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Alpha Boilers Reviews: Best Prices for Alpha Boilers 2024

Alpha boilers are manufactured by Alpha Heating Innovation, who are part of the Immergas group. Alpha boilers’ parent company, Immergas, is headquartered in Italy but has operations in more than thirty countries across the world, and is one of the leading heating appliance manufacturers in Europe. Alpha’ UK headquarters are located in Kent.

Alpha Boiler
Alpha boilers offer some of the best value for money on the UK heating market

Alpha boilers have three main advantages. Firstly, Alpha boilers strike a decent balance between affordability and quality. Alpha boilers are budget-friendly compared to the UK’s top-shelf boiler brands, with average prices of £800-£900 before installation. This price range is roughly 30% lower than that of leading boiler manufacturers, despite relatively high performance standards, long warranties, and decent customer satisfaction. Secondly, Alpha boilers have a durable build that translates into robust reliability. The boilers’ heat exchangers are made with a combination of thermoplastic and stainless steel, which makes them light and durable despite constant exposure to heat, pressure, and moisture. Combis produced by Alpha include high-efficiency, premium Grundfos pumps, which are known for their excellent performance and reliability. These are just some of the features that help Alpha boilers withstand wear and tear for many years after entering service. Alpha boilers are slightly below average in terms of reliability according to Which? but this is not surprising given the considerably low price point. Luckily, the warranties that come with Alpha boilers are quite generous, ranging between 7 and 13 years depending on the model and the extras you purchase with it. These warranty terms afford Alpha boiler users peace of mind since any faults occurring within the coverage period do not require out-of-pocket repairs. Thirdly, Alpha boilers’ replacement parts are easy to source, and this availability streamlines repairs, service, and warranty calls. Alpha boiler parts are widely available at online heating merchants and brick-and-mortar stores specialising in boiler replacement parts.

Alpha boilers have three primary disadvantages. Firstly, many heating engineers consider Alpha’s installer support to be unreliable, which at times interferes with repairs and warranty calls. Notably, customer support is of much higher quality, and most Alpha boiler users are content with the service they’ve gotten from the manufacturer. Secondly, Alpha boilers do not have advanced features, such as intelligent filling or an interactive colour display. This lack of innovative features has no effect on the boilers’ performance, but it does make Alpha boilers less user-friendly than their equivalents from many leading brands. Thirdly, Alpha boilers have relatively plain aesthetics. The boiler casing comes either in white or off-white colour and lacks the sleek, smooth lines and gloss of Worcester Greenstar 4000 or Viessmann Vitodens 100. That said, the boilers’ aesthetics are a small enough tradeoff for their affordable price point, and most people looking for a quality budget boiler wouldn’t see it as a major disadvantage.

Alpha boilers produce combination (combi), system, and regular (also known as “heat-only” and “conventional”) boilers. The boilers’ price ranges between £750 and £1,200, excluding installation. Alpha’s system boilers and E-Tec Plus range combis tend to be the most expensive, whilst its regular boilers cost the least. The boilers’ standard warranty lengths vary depending on the type and model, with E-Tec Plus combis offering 10-year standard warranties that extend to 13 years if you purchase the Premier installation pack.

Below is a detailed overview of the Alpha boiler ranges, prices, pros and cons, as well as common problems, internal components, and alternative brands.

What is the price range for Alpha Boilers?

The price range of Alpha boilers spans between £750 and £1,300, excluding installation. The cost of an Alpha boiler depends on three factors. Firstly, the type of Alpha boiler you purchase has an effect on the boiler’s cost. Alpha system boilers cost around £1,000 on average, whilst combination boilers from Alpha have a slightly lower average cost of £900. Meanwhile, Alpha heat-only boilers cost £800 on average, without installation. Secondly, the Alpha model you choose has an impact on the boiler price, as some models cost significantly more or less than the average for their boiler type. The most expensive Alpha boiler model is the INTEC 40GS combi, which costs £2,400 to purchase. The cheapest Alpha boiler is the E-Tec 15R heat-only boiler, with a price tag of £750 without installation. Thirdly, an Alpha boiler’s warranty often affects the unit’s purchase price. Alpha models that come with shorter warranty terms of 7 years cost roughly £150 less than those with standard warranty durations of 10-13 years. That said, warranty durations are not as substantial of a cost factor with Alpha boilers as they are with other boiler brands. For example, some of Alpha’s priciest system boilers (the ProTEC Plus range) come with a moderate warranty term of just 5 years. The infographic below provides an overview of Alpha boiler prices for the brand’s combination, system, and heat-only boilers ranges.

Alpha boilers prices
Alpha boilers’ price ranges for combi, system, and regular boilers

Below is a table that provides a rating of Alpha boilers’ prices and performance, design, installation, customer service, safety, and warranty duration.

Alpha Boilers
Alpha Boiler Specs Rating – 4.3/5.0
Price and performance efficiency 4.8
Design 4.0
Customer service 3.0
Safety 5.0
Warranty duration 5.0

How do Alpha boilers work?

How Alpha boilers work depends on the boiler type and the fuel that powers the boiler model. The list below overviews the functionality of different fuel and boiler types of Alpha Heating Innovation.

  • How Alpha combi boilers work: Alpha combi boilers work by heating the tap water and central heating water on demand. Alpha combis come with two heat exchangers that heat each of the two types of water separately (potable water and central heating water never come into contact with one another). The combi is able to change its mode from domestic to central heating water by means of a diverter valve, which alternates water flow between the two heat exchangers. An Alpha combination boiler thus does not require any hot or cold water storage tanks. However, Alpha combis are unable to supply both domestic and central heating water simultaneously: they always prioritise heating domestic water when you turn on a tap or a shower. Alpha combis additionally have two modes of operations: the winter mode and the summer mode. The winter mode has the Alpha combi alternating between central heating and domestic hot water based on the user’s inputs. The summer mode shuts down central heating completely, so the boiler only activates to heat water for taps and showers.
  • How Alpha system boilers work: Alpha system boilers only heat water for the central heating system. This heating water then transfers heat to the domestic hot water cylinder via an internal coil inside the cylinder. The hot water cylinder then supplies domestic hot water to the taps or showers when these are running and gets refilled from the mains as its supply runs out. The hot water cylinder is sold separately from Alpha system boilers. Alpha system boilers are able to satisfy a more robust hot water demand than their combi counterparts thanks to the added volume of hot water stored in the cylinder.
  • How Alpha regular boilers work: Alpha regular boilers (also known as “heat-only” or “conventional” boilers) work much like the system boilers, except their water supply comes from cold water storage tanks. A regular boiler requires two cold water storage tanks: one for domestic hot water, and another one for central heating. The former supplies water to the hot water cylinder, whilst the latter keeps the central heating system at the correct water pressure. It allows the system to release some excess water when the pressure gets too high and feeds more water into the heating system when the water pressure dips. The hot and cold water storage tanks are sold separately from the boiler. Alpha regular boilers are able to produce large quantities of domestic hot water due to the hot water cylinder with which they work, but their setup requires lots of space at home.
  • How Alpha gas boilers work: Alpha gas boilers of all types work in a similar fashion: natural gas flows into the home from the gas mains, then gets piped to the boiler’s burner, where ignition occurs and the resulting flame heats water via the heat exchanger. The fumes produced by the combustion of gas escape the boiler to the outdoors via the flue.
  • How Alpha LPG boilers work: Alpha Liquefied Petroleum Gas (LPG) boilers work much like gas boilers, except they combust LPG instead of natural gas to generate heat. The LPG requires on-site storage at the user’s property, and the user must refill their LPG tanks frequently.

What kind of fuel does your boiler use?

Fixed price online with next day installation

Worcester boilers from as little as £1,965.

What are the different types of Alpha Boilers?

There are three different Alpha boiler types, all of which are available in the UK: combi boilers, system boilers, and regular boilers. The list below provides an overview of the three different types of Alpha boilers, their function, price ranges, parts, safety, and warranty options.

  • Alpha combi boilers: Alpha combination boilers heat domestic and central heating water on demand. Alpha combis alternate between these two functions based on your inputs but are unable to heat water for taps and radiators at the same time. Alpha combi boilers’ ability to alternate between heating and hot water stems from their internal configuration, in which a diverter valve routes either heating or domestic water through one of the boiler’s two heat exchangers. An Alpha combi has two heat exchangers so that the radiator and tap water never come into contact. Since a combi boiler draws its domestic water supply from the mains directly, there is no need to use any cold or hot water storage tanks when you buy an Alpha combi. Combis are Alpha’s midrange boilers, with an average price point that’s lower than that of a system boiler and higher than that of a regular boiler. Alpha’s combi range comes with long standard warranty terms of 7 to 10 years (extendable to 13 years with the Alpha Premium Pack), with models that have longer warranties costing slightly more than those with shorter terms. Alpha combis are suitable for small households with moderate hot water demand and are a particularly attractive option
  • Alpha system boilers: Alpha system boilers have a single heat exchanger and only heat the water for a home’s radiators. This central heating water then passes through a coil inside a hot water cylinder, thus indirectly heating domestic water. The cylinder gets refilled via the mains and provides hot water to a home’s taps and showers as needed. Unlike a combi, an Alpha system boiler is able to supply domestic water and heat radiators at the same time. Alpha’s system boilers cost more than the manufacturer’s combi and heat-only boilers, on average. On top of the higher boiler costs, purchasing an Alpha system boiler likewise entails buying and installing a hot water cylinder if you don’t have one already. Alpha offer slightly shorter warranties on their system boilers than they do on their combis, and the warranty term lengths do not have a substantial effect on the price of the boiler. Buying an Alpha system boiler makes sense if you’ve got high demand for hot tap water, or if you have a hot water cylinder installed already.
  • Alpha regular boilers: Alpha regular boilers have a single heat exchanger, produce heating water only, and rely on a hot water cylinder to supply the home’s tap water just like their system boiler counterparts. However, Alpha regular boilers and the hot water cylinders with which they connect do not get their water from the mains directly. Instead, a heating setup with an Alpha regular boiler relies on two cold water storage tanks. One of these tanks refills the hot water cylinder when the latter runs empty, whilst the other maintains pressure in the heating system. Alpha’s regular boilers cost less than their system and combi counterparts and come with warranty terms of 2-7 years. Buying a new Alpha regular boiler is a fitting option if you already have a regular boiler installed, as swapping boilers of the same type generally costs less than changing your type of boiler. Alpha regular boilers are additionally a suitable heating option if you’ve got a high demand for domestic hot water.
What is the Alpha combi boiler price range?

The table below provides an overview of the current Alpha combi boiler type price range.

Alpha Combi Boiler Models Heating kW Consumption Hot Water kW Consumption Warranty Duration Boiler Price Range Installation Cost
Alpha E-Tec 28kW/33kW 26.1kW-29.7kW 28kW-33kW 7 years £800-1,000 £800-1,500
Alpha E-Tec Plus 28kW/33kW/38kW 26.1kW-32kW 28kW-38kW 13 years* £900-1,200 £800-1,500
Alpha E-Tec NX 26.1kW-30.4kW 28kW-33kW 7 years £900-1,100 £800-1,500
Alpha Evoke 26.1kW-29.7kW 28kW-33kW 7 years £800-900 £800-1,500
*When installed with the Alpha Premier Pack, otherwise 10 years
What is the Alpha system boiler price range?

Below is a table with an overview of the current Alpha system boiler type price range.

Alpha System Boiler Models kW Consumption Warranty Duration Boiler Price Range Installation Cost
Alpha E-Tec 20s 26.1kW 10 years* £800-900 £800-1,800
Alpha E-Tec 30s 29.7kW 10 years* £900-1,000 £800-1,800
Alpha E-Tec 35s 35kW 10 years* £1,000-1,300 £800-1,800
**When installed with the Alpha Premier Pack, otherwise 7 years
What is the Alpha regular boiler price range?

The current Alpha regular boiler type price range is provided in the table below.

Alpha Regular Boiler Models kW Consumption Warranty Duration Boiler Price Range Installation Cost
Alpha E-Tec 15R 15.1kW 7 years £750-850 £800-1,800
Alpha E-Tec 20R 20.4kW 7 years £750-850 £800-1,800
Alpha E-Tec 25R 32kW 2 years £800-900 £800-1,800

Note that the boiler and installation costs in the tables above are estimates that may change depending on your location, the type of boiler you have installed at home, and whom you choose to fit your new Alpha. You’re able to get a firm estimate for a new Alpha from Heatable, an online boiler installer operating nationally in the UK. All you need to do is fill out Heatable’s anonymous questionnaire to get a fixed-price Alpha boiler quote on your screen.

What are the different Alpha boiler models?

The table below summarises the different Alpha boiler models, along with their price and power ranges.

Model Price Range (Boiler Only) Power Output
Alpha E-Tec 28kW combi boiler £800-1,000 26.1kW (heating)/28kW (hot water)
Alpha E-Tec 33kW combi boiler £800-1,000 29.7kW (heating)/33kW (hot water)
Alpha E-Tec Plus 28kW combi boiler £900-1,200 26.1kW (heating)/28kW (hot water)
Alpha E-Tec Plus 33kW combi boiler £900-1,200 29.7kW (heating)/33kW (hot water)
Alpha E-Tec Plus 38kW combi boiler £900-1,200 32kW (heating)/38kW (hot water)
Alpha E-Tec NX 28kW combi boiler £900-1,100 26.1kW (heating)/28kW (hot water)
Alpha E-Tec NX 33kW combi boiler £900-1,100 29.7kW (heating)/33kW (hot water)
Alpha Evoke 28kW combi boiler £800-900 26.1kW (heating)/28kW (hot water)
Alpha Evoke 33kW combi boiler £800-900 29.7kW (heating)/33kW (hot water)
Alpha E-Tec 20S system boiler £800-900 26.1kW
Alpha E-Tec 30S system boiler £900-1,000 35kW
Alpha E-Tec 35S system boiler £1,000-1,300 29.7kW
Alpha E-Tec 15R regular boiler £750-850 15.1kW
Alpha E-Tec 20R regular boiler £750-850 20.4kW
Alpha E-Tec 25R regular boiler £800-900 32kW

1. Alpha E-Tec Plus

Alpha E-Tec Plus is Alpha’s flagship combi boiler range that offers models in the three heating and hot water outputs listed below along with their suitability.

  • Alpha E-Tec Plus 28kW (hot water)/26.1kW (heating): Suitable for apartments and smaller houses with 10 or fewer radiators and a single bathroom.
  • Alpha E-Tec Plus 33kW (hot water)/29.7kW (heating): Well-suited for mid-sized homes with 10-15 radiators, 2 bathrooms, and 2-4 bedrooms.
  • Alpha E-Tec Plus 38kW (hot water)/32kW (heating): A fitting choice for larger properties with 15-20 radiators, 2 bathrooms, and 3-5 bedrooms.

Alpha E-Tec Plus boiler models cost between £800 and £1,300 excluding the boiler fitting cost, which represents the higher end of the range for Alpha’s pricing. The higher prices stem from the fact that E-Tec Plus boilers come loaded with features that other Alpha boilers lack, such as a backlit LCD display with diagnostics, and longer warranty terms. These characteristics set the E-Tec Plus range apart from other Alpha boilers, along with the fact that E-Tec Plus models additionally have larger physical dimensions.

Boilers in Alpha’s E-Tec Plus range are combination boilers, so they’re able to produce central heating and domestic hot water without needing hot or cold water storage tanks. There are no special safety considerations related to Alpha E-Tec Plus combis, apart from those that apply to all gas-fired boilers. The models comprising the E-Tec Plus lineup come with a standard 10-year warranty that goes up to 13 years if you purchase Alpha’s Premium Pack for installation.

2. Alpha E-Tec

The Alpha E-Tec range is broad and includes combi, regular, and system boilers to cater to different household needs. The three sections below provide a detailed breakdown of the combi, system, and regular boilers in the Alpha E-Tec range.

Alpha E-Tec combi boilers

The list below provides the heating output and suitability information for the two combination boilers in the Alpha E-Tec range.

  • Alpha E-Tec 28kW (hot water)/26.1kW (heating): Suitable for small to medium-sized houses with up to 10 radiators and one bathroom.
  • Alpha E-Tec 33kW (hot water)/29.7kW (heating): Well-suited for medium-sized homes with 10-15 radiators, 2 bathrooms, and 2-4 bedrooms.

Alpha E-Tec combi boilers are priced between £800 and £1,000 (without installation). These combis have a small footprint, which makes them a good choice for homes with limited space and sets them apart from the larger E-Tec Plus combi boilers. E-Tec combis have a durable stainless steel heat exchanger, energy-efficient Grundfos pump, and a backlit LCD with push button controls for easy navigation by the user. A standard 7-year warranty comes with the E-Tec combination boilers. See if a new Alpha E-Tec is suitable for your home by filling out Heatable’s online heating questionnaire.

Alpha E-Tec system boilers

The Alpha E-Tec system boilers are available in the three models listed below.

  • Alpha E-Tec 20S: The 20S model has a heating capacity of 26.1kW, which makes it suitable for small to medium-sized homes with modest demand for domestic hot water.
  • Alpha E-Tec 30S: Alpha E-Tec 30S comes with 29.7kW of heating capacity, so it’s able to power larger properties with multiple bedrooms and robust hot water consumption.
  • Alpha E-Tec 35S: The E-Tec 35S system boiler is well-suited for medium to large-sized homes with more than one bathroom thanks to its comparatively high, 35kW heating output.

System boilers in the E-Tec S range cost between £800 and £1,300, excluding installation. They require a hot water cylinder to supply domestic hot water and are thus able to serve homes with higher hot water consumption than E-Tec combis. The S range comes with a 7-year warranty that extends to 10 years with the purchase of the Alpha Premier Pack.

Alpha E-Tec regular boilers

Below is a list of the three regular boilers available in the E-Tec range, along with their ideal application.

  • Alpha E-Tec 15R: The 15R regular boiler produces a heating output of 15.1kW. It is suitable for smaller homes with 10-15 radiators.
  • Alpha E-Tec 20R: Alpha E-Tec 20R has a heating output of 20.4kW, and is well-suited for medium-sized homes with 15-20 radiators.
  • Alpha E-Tec 25R: The E-Tec 25 has a high central heating capacity of 32kW, which makes it a good fit for larger homes with over 20 radiators.

The regular boilers in the E-Tec range cost between £750 and £900, without installation. However, note that you must purchase and install cold and hot water tanks if you haven’t got them fitted already. The E-Tec regular boilers are able to work either with the open-vented or sealed hot water tanks. The physical dimensions of the E-Tec regular boiler range set these boilers apart from other models in the Alpha lineup. These regular boilers are truly compact by definition, measuring just 600mm x 390mm x 305mm (HxWxD), so they fit into the smaller kitchen cupboards without issue. The 15R and 20R boilers come with a 7-year standard warranty, whilst the 25R model has only a 2-year warranty.

3. Alpha E-Tec NX

Alpha E-Tec NX is Alpha’s advanced combi boiler range that offers models in the following two heating and hot water outputs.

  • Alpha E-Tec NX 28kW (hot water)/26.1kW (heating): Suitable for apartments and smaller houses with 10 or fewer radiators and a single bathroom.
  • Alpha E-Tec NX 33kW (hot water)/29.7kW (heating): Well-suited for mid-sized homes with 10-15 radiators, 2 bathrooms, and 2-4 bedrooms.

Alpha E-Tec NX boiler models cost between £900 and £1,100, which is on the higher end of the scale for Alpha and similar to the pricing of the E-Tec Plus. What sets the NX range apart from other boilers is its renewed heat exchanger design. The heat exchanger has a stainless steel coil encased in composite thermoplastic, a configuration that enhances the boiler’s durability while reducing its weight.

The boilers in Alpha’s E-Tec NX range are combination boilers, so they’re capable of providing central heating and domestic hot water without requiring hot or cold water storage tanks. Standard safety considerations apply to Alpha E-Tec NX combis similar to all gas-fired boilers. The models in the E-Tec NX lineup come with a warranty period of 7 years, which is comparable to warranties that other leading boiler brands offer.

4. Alpha Evoke

Alpha Evoke is Alpha’s high-efficiency combi boiler range. The two Alpha Evoke models and their specifications are detailed in the list below.

  • Alpha Evoke 28kW (hot water)/ 26.1kW (heating): The model is suitable for small to medium-sized homes with up to 10 radiators and modest heating needs.
  • Alpha Evoke 33kW (hot water)/30.1kW (heating): This model is a good fit for medium-sized homes, with 10-15 radiators and 2 bathrooms.

Boilers in the Evoke range cost between £800-£900, without installation. The price point is a bit lower than that of the E-Tec Plus range, and Evoke boilers come with a shorter, 7-year standard warranty. The Evoke-series boilers come with the same stainless steel and thermoplastic heat exchanger as their E-Tec Plus counterparts, but their dimensions are a bit smaller in depth. The E-Tec Plus boilers measure 268mm in depth, whilst Evoke combis are 255mm deep, which means they’re able to fit into shallower cabinets.

Find out which Alpha range and model is most fitting for your property using Heatable’s online boiler selection tool. The tool uses the information you supply about your home’s heating configuration to recommend the most suitable boiler models, along with fixed-price quotes.

How is the efficiency of Alpha boilers according to the reviews?

There are no reviews related specifically to the efficiency of Alpha boilers since efficiency is not easy for boiler owners to quantify and track consistently in the face of fluctuating energy prices. However, there are two facts that confirm Alpha boilers’ ability to operate with high levels of fuel efficiency. Firstly, all Alpha boilers available on the market are manufactured to modern efficiency standards (a legal requirement in the UK), with an average heating efficiency of 93% and a hot water ErP rating of A. The 93% heating efficiency means that for every pound spent on gas, an Alpha boiler converts 93p into usable heat, and only 7p escapes up the flue and through the boiler’s casing. It’s an impressive efficiency rating, considering that old boilers tend to waste as much as 30p for every pound spent on fuel. Secondly, a study by Which? revealed that 81% of Alpha boiler owners are happy with their boilers. Such a high level of satisfaction would be unlikely had these boilers guzzled fuel and led to unreasonably high utility bills.

Does Alpha Boiler heat home quickly?

Whether an Alpha boiler heats a home quickly depends on two factors. Firstly, an Alpha boiler’s ability to raise the air temperature inside a home quickly depends on whether the boiler is correctly sized. A boiler with a heating output that’s too low in relation to the quantity of radiators is likely to struggle to heat the home quickly, and the indoor air temperatures may not reach the desired level at all. However, an Alpha boiler that’s sized correctly for the property should be able to raise the interior air temperature by approximately 1°C per hour. Secondly, the rate at which an Alpha boiler is able to heat a home depends on the flow water temperature setting. The flow water is the heated water exiting the boiler on its way to circulate throughout the home’s radiators. The ideal flow temperature is between 60°C and 70°C. Setting your Alpha boiler flow temperature any higher leads to quicker heating times for the home, but doing so prevents the boiler from operating in the energy-efficient condensing mode.

Is an Alpha boiler good for the United Kingdom winter conditions?

Yes, an Alpha boiler is good for the United Kingdom winter conditions for three reasons. Firstly, Alpha boilers are able to supply sufficient heat to raise the interior air temperature of a home via radiators, given that the boiler is correctly sized for the property. Most Alpha boiler models have a central heating output of 15-30kW, which is enough to heat homes with 10-30 radiators on cold winter days. Secondly, Alpha boilers feature a built-in frost thermostat, which prevents the water inside the boiler from freezing over while the boiler is inactive on a frigid day. The frost thermostat causes the boiler to turn on, and the pump to begin circulating water (thus preventing freezing and subsequent blockages) if the internal water temperature dips to 5°C. Thirdly, Alpha boilers are sufficiently energy-efficient to shield users from the inflated energy costs of heating their homes during a typical UK winter, when the mercury often sinks below 0°C and the boiler must stay on for longer periods to keep the home warm. Alpha boilers’ energy efficiency is between on average 93%, so households using their Alpha boilers to heat homes in winter should expect 93p of every pound spent on gas to convert into usable heat. Fourthly, Alpha boilers come with an optional weather compensation probe, which adjusts the boiler’s operation based on the outdoor temperatures. This probe allows the boiler to heat a home quickly when the outdoor temperatures dip during winter.

What are the advantages of Alpha boilers?

Below are the four advantages of Alpha boilers.

  • Offer a budget-friendly heating solution: Alpha boilers are affordable compared to competing premium brands in the UK. An Alpha boiler costs around £900 on average (excluding installation), whilst Worcester, Viessmann, and Vaillant boilers with an equivalent power output and warranty length typically cost £1,100-£1,300.
  • Operate fault-free for several years: A study performed by Which? found that 75% of surveyed Alpha boiler owners did not have any faults in the first six years of their boilers’ operation. This is a comforting statistic if you’re considering an Alpha boiler, especially considering the fact that many Alpha models come with warranty terms of 10-13 years. However, this figure is roughly 5% less than the national average, according to the same Which? study.
  • Come with parts that are easy to source: UK heating engineers surveyed by Which? shared that Alpha parts are readily available, and this availability simplifies repairs and warranty calls. That said, the same survey shows that the majority of heating engineers find replacement Alpha components to be slightly more expensive than those of competing boiler brands.
  • Offer a range of useful optional features: The Alpha boiler range comes with an assortment of optional features and devices that further improve the boilers’ functionality. For example, the Gas Saver is an optional device that fits on top of the boiler and captures latent heat escaping with the flue gasses. The device then uses the latent heat to raise the temperature of the mains water as it enters an Alpha combi, thus reducing the amount of gas used to heat domestic water by up to 35%. Alpha boilers additionally come with a weather compensation feature, which enables the boiler to adjust its heating output based on outdoor temperatures, thus improving home comfort and reducing fuel waste.
boiler installation cost Heatable

How is the energy consumption of Alpha boilers?

The energy consumption of Alpha boilers is different for electricity and natural gas, both of which are required to power a boiler. A gas boiler consumes electricity, which powers its PCB and allows various boiler components to communicate with each other as they receive user commands. The amount of electricity used to power a boiler usually stays the same whenever the boiler is turned on. A boiler additionally uses gas to produce heat, which it then transfers to heating water and domestic water. Combination boilers perform the heating and domestic hot water functions separately, so Alpha combis’ energy consumption differs between central heating and hot water. System and regular boilers only heat the radiator water directly, so there’s a single energy consumption data point to consider with an Alpha system or regular boiler.

Determining how much electricity an Alpha boiler consumes is simple: the value is generally stated in the manufacturer’s literature. Finding out how much gas a particular Alpha boiler model uses for hot water and heating is possible by dividing the boiler’s output by its efficiency rating. The efficiency rating is expressed as a percentile that represents the amount of energy converted into heat. The example below illustrates how to calculate the gas consumption of an Alpha E-Tec 28 Plus combi boiler at its maximum outputs.

Alpha E-tec 28 Plus central heating and hot water capacity and efficiency:

  • Alpha E-Tec Plus 28 central heating output: 26.1kW
  • Alpha E-Tec Plus 28 hot water output: 28kW
  • Alpha E-Tec Plus 28 heating efficiency: 93%
  • Alpha E-Tec Plus 28 hot water efficiency: 87%

Alpha E-tec Plus 28 central heating gas consumption per hour:

26.1 / 0.93 = 28.06kW

Therefore, an Alpha E-Tec Plus 28 consumes 28.06kW of gas per hour of operation at maximum capacity when heating a home.

Alpha E-tec Plus 28 hot water gas consumption per hour:

28k / 0.87 = 32.18kW

Therefore, an Alpha E-Tec Plus 28 consumes 32.18kW of gas per hour of operation while heating domestic water.

The table below provides an overview of typical electricity and gas consumption by common Alpha boiler models.

Alpha boiler model Approximate electricity consumption per hour (operating/standby) Approximate natural gas consumption per hour for heating Approximate natural gas consumption per hour for hot water
Alpha E-Tec 28 combi boiler 80W/2W 28.06 kW 32.41 kW
Alpha E-Tec 33 combi boiler 105W/2W 31.94 kW 36.78 kW
Alpha E-Tec Plus 28 combi boiler 80W/2W 28.06 kW 32.41 kW
Alpha E-Tec Plus 33 combi boiler 105W/2W 31.94 kW 36.78 kW
Alpha E-Tec Plus 38 combi boiler 120W/2W 34.41 kW 43.56 kW
Alpha E-Tec NX 28 combi boiler 90W/3W 27.76 kW 32.13 kW
Alpha E-Tec NX 33 combi boiler 120W/3W 32.34 kW 36.78 kW
Alpha Evoke 28 combi boiler 80W/2W 28.06 kW 32.53 kW
Alpha Evoke 33 combi boiler 105W/2W 31.94 kW 36.78 kW
Alpha E-Tec 20s system boiler 80W/2W 28.06 kW n/a
Alpha E-Tec 30s system boiler 105W/2W 31.94 kW n/a
Alpha E-Tec 15R regular boiler 55W/6W 17.72 kW n/a
Alpha E-Tec 20R regular boiler 55W/6W 23.59 kW n/a
Alpha E-Tec 25R regular boiler 55W/6W 28.37 kW n/a

Do Alpha boilers give a signal for fuel waste?

No, Alpha boilers do not give a signal for fuel waste specifically. However, Alpha boilers do give signals that may indirectly indicate that the boiler is wasting fuel. These error codes differ depending on the model and fault, but below are two examples of fault codes that may point to fuel waste.

  • 0A15- 0A18 – Flow and return water anomalies: These fault codes may indicate issues with the heating water circulation, which may mean that the boiler is not operating efficiently. A boiler that’s not operating efficiently is likely wasting fuel.
  • 10 – Primary system pressure low: A low system pressure means that the radiators are not getting the volume of water needed to stay sufficiently hot. This error means that the boiler is wasting fuel to create heat that does not reach the radiators.

What is the estimated lifespan for an Alpha boiler?

The estimated lifespan for an Alpha boiler is 10 to 15 years. The lifespan of the boiler depends on three factors. Firstly, some Alpha boiler models are more reliable than others, so they tend to have the longest lifespans as their parts endure wear and tear better. The warranty attached to the Alpha boiler is a credible indicator of when wear-and-tear-related issues should begin to emerge. Boilers with 13-year warranties, such as the Alpha E-Tec Plus, should be expected to operate over a decade before developing significant faults, and possibly even longer with annual boiler service. On the other hand, the 2-year standard warranty that comes with the E-Tec 25R regular boiler indicates Alpha’s lack of trust that the boiler is capable of operating fault-free for a long time. Secondly, proper maintenance and annual boiler service help extend an Alpha boiler’s lifespan. Maintaining and servicing a boiler frequently provides an opportunity to rectify minor issues before they progress and cause major faults that negatively impact the boiler’s longevity.

Note that an Alpha boiler’s lifespan does not fully indicate its ability to endure wear and tear, as faults tend to develop well before the boiler is expected to break down completely. Research performed by Which? Shows that 25% of Alpha boiler owners begin experiencing faults with their boilers within the first six years of service. These boiler faults do not necessarily mean a full boiler breakdown, nor do they necessitate a full boiler replacement. However, this statistic indicates that Alpha boilers’ 10-15-year lifespan does not equal a lifetime free of errors.

What are the disadvantages of Alpha Boilers?

Below are the four disadvantages of Alpha boilers.

  • Offer unreliable installer support: Alpha’s support is seen as inadequate by heating engineers trying to repair the boilers, according to a Which? survey. Poor manufacturer support translates into longer repair times and uncertain outcomes in terms of repair quality.
  • Lack advanced features: Alpha boilers do not have some of the advanced features their premium competitors offer. For example, Alpha’s boilers do not have a full-colour display, intelligent filling function, or a system that automatically calibrates the burner’s operation to the gas quality. However, the lack of these features is not a deal-breaker for households that are content with a no-frills, low-cost boiler.
  • Plain aesthetics: Alpha boilers lack the sleek, contemporary design of their Worcester or Viessmann counterparts, characterised by glossy casings and large colour displays. Boilers produced by Alpha feature a minimalistic design and a basic digital display.
  • Come with a questionable build quality: Alpha boilers are known among engineers for several issues that entail repairs. These include blocked burners, ignition errors, and faulty diverter valves. These are minor issues that do not necessitate expensive fixes and are covered by the manufacturer’s warranty. However, it’s good to be mindful of these potential problems with Alpha boilers and choose a model with a sufficiently long warranty period (7-10 years as a minimum) to avoid having to pay for repairs out-of-pocket.

Do Alpha boilers operate quietly?

No, Alpha boilers do not operate quietly. Most Alpha boiler models operate at a noise level of 50dB-55dB, which is comparable to the noise produced by a normal conversation or rainfall. These noise levels are above those produced by a refrigerator (~45dB), but lower than those a washing machine or hair dryer generates (60-75dB). Alpha’s noise levels make the manufacturer’s boilers relatively noisy compared to counterparts from competing brands. For example, Viessmann, Worcester, Vaillant, and Ideal boilers operate at 40dB-50dB, a noise level more comparable to that produced by a fridge.

Do the Alpha boilers vibrate while working?

Alpha boilers sometimes vibrate while working (as all boilers do), but inconsistent vibrations may indicate the following four problems.

  • Seized pump: Alpha boilers have a pump that circulates water throughout the central heating system. The pump may operate improperly due to blockages or wear-and-tear, and this malfunction often causes the pump to produce vibrations. These vibrations are often audible to the boiler user.
  • Debris buildup: Limescale and sludge buildup inside any of the components comprising the boiler’s hydraulic block, including the diverter valve, heat exchanger, pump, pressure release valve, and bypass valve, may cause the boiler to vibrate as the blockages inhibit proper water circulation.
  • Boiler fan fault: An Alpha boiler may vibrate while working if its fan develops a fault, either due to wear and tear or parts coming loose.
  • Improper boiler installation: You may hear an Alpha boiler vibrating if it hasn’t been installed properly. A boiler that’s not fitted correctly in its spacing bracket may vibrate during operation because it doesn’t have a snug enough fit against the bracket and the wall.

Do Alpha boilers have any safety concerns?

No, Alpha boilers do not have any safety concerns beyond the general safety risks associated with boilers and all gas appliances, as long as they are installed and operated in accordance with Alpha’s instructions. The installation of Alpha boilers should comply with the following ten standards to be safe, according to Alpha’s installation instructions.

  • BS 5440-1: 2008 – Flueing and Ventilation Requirements
  • BS 5440-2: 2009 – Installation and Maintenance of Flues and Ventilation
  • BS 5546: 2010 – Specification for Water Heating Appliances
  • BS 6798: 2009 – Specification for Installation gas fired boilers up to 70 kW
  • BS 6891: 2005 + A2: 2008 – Installation of low-pressure Gas Pipework
  • IGEM/UP/2 – Installation of pipework
  • IGEM/UP/4 – Commissioning of gas-fired plant
  • IGE/UP/10 – Installation of Flued gas appliances
  • IGEM/UP/16 – Design for natural gas installations
  • IGE/UP/1 and 1B – Strength Testing and tightness testing Natural Gas Installations

Alpha boiler users should operate their boilers in accordance with the manufacturer’s instructions, which are generally supplied during installation. Adhering to the manufacturer’s instructions lowers the probability of the following possible hazardous situations occurring.

  • Gas leak: Alpha gas boilers are designed to combust natural gas safely. However, issues with the gas valve or other internal components may produce a gas leak. Noticing a gas odour around the boiler is an indication of this fault.
  • Carbon monoxide leak: Alpha boilers are designed to vent their exhaust fumes, which contain carbon monoxide, to the outdoors via the flue. However, component failure may cause the toxic gas to escape the boiler inside the home. The carbon monoxide alarm that’s typically installed next to the gas boiler should warn the user of this problem, at which point the user needs to shut off their boiler and seek help from a Gas Safe-registered heating engineer.
  • Explosion: Any boiler, including one produced by Alpha, may explode due to a malfunction in the internal components that transport and combust gas, or due to excessive pressure buildup. However, modern Alpha boilers are fitted with numerous safety mechanisms that shut the boiler down if the gas is not burning or flowing the way it should, as well as devices that allow the boiler to release excess pressure.
  • Electrocution: Operating a boiler poses no risk of electrocution. However, a major boiler leak may cause some of the home’s wiring to become submerged in water, thus creating an electrocution hazard for the user.

The best course of action for preventing any of the above hazards associated with operating a boiler is to contact a Gas Safe engineer at any sign of trouble with the boiler, particularly if the boiler locks out. Attempting to fix an Alpha boiler (or any other boiler) on your own amplifies the likelihood of any of the above hazards causing an immediate threat to your health and safety.

What are the most common problems of Alpha boilers?

Below are the four most common problems of Alpha boilers.

  • Burner not igniting: An Alpha boiler that’s failing to ignite on several attempts displays a consistent red light at the “A” indicator. The most likely reason an Alpha boiler is struggling to ignite is that its burner is blocked with debris or carbon buildup. A Gas Safe engineer is able to rectify this problem by cleaning the burner in most cases, although older burners with significant wear may require replacement.
  • No hot water: No hot water coming from an Alpha boiler generally points to a faulty diverter valve. The diverter valve is the component that alternates a combi boiler’s function between heating and domestic hot water, and a faulty valve may be stuck in the “heating” position, thus preventing the boiler from heating tap water. A Gas Safe engineer may be able to repair the diverter valve in some cases, although older valves may be too worn out and need to be replaced.
  • Water is lukewarm: An Alpha boiler producing lukewarm water may have a thermistor fault. The thermistor senses the water temperature, and a fault in this component may lead to incorrect signals telling the boiler to scale down its heating output. A Gas Safe engineer needs to diagnose and troubleshoot an Alpha boiler that’s failing to produce sufficiently hot water.
  • Low pressure: Alpha boiler components sometimes leak, thus causing system pressure to drop. Low system pressure means that the boiler is unable to operate efficiently, as not enough hot water circulates the heating system. The root cause of low pressure (the leak) is dangerous in itself, as it may permanently damage expensive electrical components, such as the Printed Circuit Board (PCB).
Alpha boilers problems
Common problems of Alpha boilers

What are the Alpha combi boiler ranges?

The table below provides an overview of the Alpha combi boiler ranges.

Boiler Model Heating kW Hot Water kW Efficiency Warranty Boiler Price Range
Alpha E-Tec 28kW/33kW 26.1kW-29.7kW 28kW-33kW 93% 7 years £800-1,000
Alpha E-Tec Plus 28kW/33kW/38kW 26.1kW-32kW 28kW-38kW 93% 13 years £900-1,200
Alpha E-Tec NX 26.1kW-30.4kW 28kW-33kW 93% 7 years £900-1,100
Alpha Evoke 26.1kW-29.7kW 28kW-33kW 93% 7 years £800-900

Where is an Alpha combi boiler suitable? An Alpha combi boiler is suitable in small-to-mid-sized properties in which the households consume hot water moderately, and where budget is a crucial factor in boiler model selection. Alpha combi boilers are capable of supplying heat and hot water to homes with up to 15 radiators and two bathrooms. The relatively low price point of Alpha boilers, combined with these boilers’ high fuel efficiency and reasonable reliability make Alpha an appealing choice for those who prefer a no-frills, durable, and inexpensive boiler. Check out Alpha’s prices (including installation) using Heatable’s online boiler quotation tool.

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What are the Alpha boiler parts?

The table below summarises the alpha boiler parts and their function.

Alpha Boiler Parts Function Model/Part Number
Heat exchanger for heating Transfers heat from the burner to the central heating water E-Tec Plus 28/20S/15R/20R/25R/Evoke 28 – 3.027697

E-Tec Plus 33/30S/Evoke 33 – 3.027698

E-Tec Plus 38 – 3.031018

E-Tec NX 28 – 3.034435

E-Tec NX 33 – 3.034434

Burner Produces heat by combusting fuel (natural gas or LPG) E-Tec Plus 28/20S/15R/20R/25R/Evoke 28 – 1.040669

E-Tec Plus 33/30S/Evoke 33 – 1.040670

E-Tec Plus 38 – 1.043043

E-Tec NX 28 – 1.046538

E-Tec NX 33 – 1.045690

Flue Expels toxic exhaust gases to the outdoors E-Tec Plus 28/33/38/20S/30S/Evoke 28/33 – 3.027702

E-Tec NX 28/33 – 3.032822

E-Tec 15R/20R/25R – 3.029728

Ignition system Ignites the fuel flowing into the burner E-Tec Plus 28/33/38/20S/30S/Evoke 28/33 – 1.039673

E-Tec NX 28/33 – 1.046654

E-Tec 15R/20R/25R – 1.041173

Pump Circulates hot water throughout the central heating system E-Tec 28/33/E-Tec Plus 28/33/20S/30S/Evoke 28/33 – 3.025935
Printed Circuit Board (PCB) Controls and enables communication between various boiler components E-Tec Plus 28/33/38/20S/30S/Evoke 28/33 – 1.037031

E-Tec NX 28/33 – 1.045759

E-Tec 15R/20R/25R – 1.041489

Gas valve Controls the flow of gas to the boiler’s burner E-Tec Plus 28/33/38/20S/30S/15R/20R/25R/Evoke 28/33 – 1.039944

E-Tec NX 28/33 – 1.047483

Expansion vessel Absorbs excess pressure as the water inside the boiler heats and expands E-Tec Plus 28/33/38/20S/30S/Evoke 28/32 – 1.039208

E-Tec NX 28/33 – 1.044389

Pressure relief valve (PRV) Allows the boiler to release pressure when it climbs above the normal operating levels E-Tec Plus/NX 28/33/38/20S/30S/Evoke 28/33 – 1.028561
Overheat thermostat Regulates the temperature of the water that the boiler heats E-Tec 15R/20R/25R – 1.040935
Diverter valve Allows a combi boiler to alternate its function between central heating and domestic hot water E-Tec Plus/NX 28/33/38/Evoke 28/33 – 3.025230/1.033918
Air vent Allows the heating system to expel air trapped in the water E-Tec Plus/NX 28/33/38/20S/30S/Evoke 28/33 – 1.027110
Condensate trap Collects and removes condensate produced by the boiler during operation E-Tec Plus 28/33/38/20S/30S/Evoke 28/33 – 1.039244

E-Tec NX 28/33 – 1.043051

E-Tec 15R/20/25R – 1.037797

Heat exchanger for domestic hot water Transfers heat from the burner to the domestic water E-Tec Plus 28/Evoke 28 – 3.022783

E-Tec Plus 33/Evoke 33 – 3.021693

E-Tec Plus 38 – 3.022784

E-Tec NX 28 – 3.034535

E-Tec NX 33 – 3.034536

Filling loop Allows users to top up their central heating system if the water pressure is low 3.023115
Filter Prevents sludge and unwanted debris from accumulating inside the boiler’s internal components Cyclone Plus

1. Heat exchanger in Alpha boilers

A heat exchanger in Alpha boilers transfers heat from the flame produced by the boiler’s burner to the central heating water. This heat exchanger is referred to as the “primary” heat exchanger in Alpha combi boilers, since combis additionally have a secondary heat exchanger to transfer heat to domestic water. Below is a table listing the Alpha primary heat exchangers’ part numbers, along with the models that use them.

Heat Exchanger Part Number Alpha Boiler Model
3.027697 E-Tec Plus 28 combi boiler
E-Tec 20S system boiler
E-Tec 15R/20R/25R regular boilers
Evoke 28 combi boiler
3.027698 E-Tec Plus 33 combi boiler
E-Tec 30S system boiler
Evoke 33 combi boiler
3.031018 E-Tec Plus 38 combi boiler
3.034435 E-Tec NX 28 combi boiler
3.034434 E-Tec NX 33 combi boiler

All of the Alpha boilers’ primary heat exchangers are manufactured from stainless steel, a material that helps the part endure constant stresses associated with high heat, pressure, and moisture. Having a boiler with a quality heat exchanger that withstands wear-and-tear is essential, since heat exchangers are among the most expensive parts in any boiler, including those made by Alpha. The cost of an Alpha E-Tec plus combi heat exchanger is about £250-300, excluding the labour needed to perform the replacement. Common problems with Alpha’s heat exchangers (despite their inherent durability) include cracking due to the wear-and-tear that’s inevitable after years of service, and blockages due to limescale and heating sludge buildup. Luckily, Alpha’s heat exchangers come with a separate 10-year warranty, so you shouldn’t have to pay out-of-pocket for any faults within the first 10 years of service.

2. Burner in Alpha boilers

The burner in an Alpha boiler combusts gas to generate heat, which the heat exchanger then transfers to the central heating or domestic water. The gas flow to the burner is controlled by the gas valve, while the electrodes inside the burner chamber produce sparks to light the gas. The burner model used in Alpha boilers differs depending on the boiler model, the table below lists Alpha burners’ part numbers along with their corresponding boiler models.

Burner Part Number Alpha Boiler Model
1.040669 E-Tec Plus 28 combi boiler
E-Tec 20S system boiler
E-Tec 15R/20R/25R regular boiler
Evoke 28 combi boiler
1.040670 E-Tec Plus 33 combi boiler
E-Tec 30S system boiler
Evoke 33 combi boiler
1.043043 E-Tec Plus 38 combi boiler
1.046538 E-Tec NX 28 combi boiler
1.045690 E-Tec NX 33 combi boiler

A burner is an integral part of any boiler, since it generates the heat needed to raise the temperature of heating and tap water. Alpha’s burners are made to withstand years of heat-related stress. However, a common problem burners experience is blockage due to carbon deposits. Most burner issues surrounding carbon deposits are not difficult to repair, and a simple cleanup usually suffices. However, older burners may require replacement if their blockage is too severe or they’re too worn out after years of service. An Alpha burner costs between £50 and £70 without labour.

3. Flue in Alpha boilers

The flue in an Alpha boiler is a vital safety component that carries exhaust fumes from the boiler’s burner to the outdoors, where it expels them. Alpha boilers use the telescopic Alpha CD EasyFlue, which comes in two lengths, 500mm and 1,000mm, with 12m and 15m extension kits for horizontal and vertical applications, respectively. Alpha’s CD EasyFlue provides an effective solution for expelling flue gases from the home, and its integral plume management kit allows users to channel the plume direction away from the home’s doors and windows.

Common problems with boiler flues include blockages and acidic condensation that may leak and damage surrounding infrastructure. Boiler flues may get clogged with debris, such as twigs, feathers, leaves, and rubbish. A flue blockage triggers a boiler lockout, since the boiler is unable to expel its toxic exhaust fumes safely. Such a blockage is a problem that typically requires a Gas Safe engineer’s input, especially if you’re unsure where the flue is blocked or how to get to the location of the built-up debris. Flues that aren’t able to drain condensate (which often appears as warm, moist flue gases cool down on their way to the outdoors) may damage the boiler and surrounding pipework due to the condensate’s acidic nature. A flue error that triggers a boiler lockout may be addressed with a simple cleanup of the blockage if the latter is the culprit. However, worn-out flues that crack or leak likely need a replacement. An Alpha CD EasyFlue replacement costs roughly £90 if you need the 500mm version, and £150 for the 1,000mm variant, excluding installation.

4. Ignition system in Alpha boilers

The ignition system in Alpha boilers typically comprises electrodes that produce a spark to light the gas flowing into the burner. The ignition system functions in this manner in all Alpha boilers, although different Alpha models use different electrodes. Below is a table listing the ignition electrodes used by common Alpha combi, system, and regular boiler models.

Ignition electrode part number Alpha boiler model
1.039673 E-Tec Plus 28/33/38 combi boiler
E-Tec Plus 20S/30S system boiler
Evoke 28/33 combi boiler
1.046654 E-Tec NX 28/33 combi boiler
1.041173 E-Tec 15R/20R/25R regular boiler

Alpha’s electrodes are not known for any defects, although all boiler electrodes suffer damage with age and years of wear and tear. A cracked electrode causes the boiler to operate inconsistently, as it’s unable to light the gas every time it has to. A boiler may be unable to ignite at all if the ignition system is severely damaged. An ignition electrode is thus a vital boiler component that needs either immediate repairs or replacement when it ceases to function properly. Replacing a broken ignition electrode is usually preferred over repairs, and a replacement Alpha electrode costs £60-£80 without labour.

5. Pump in Alpha boilers

A pump in Alpha boilers helps circulate heated water throughout the heating system. A circulator pump is an important component without which a boiler is unable to generate the flow of water through the home’s pipework and radiators. Alpha combi and system boilers have internal pumps, whilst regular boilers work with pumps that are installed externally at the heating pipework.

Alpha boilers use circulator pumps manufactured by Grundfos pumps (Alpha part number 3.025935). Grundfos pumps are considered to be the best in terms of quality, as they resist wear and tear for many years without seizing or developing leaks. However, all pumps may develop faults from time to time, such as gasket leaks. Such leaks require a straightforward fix, which usually entails a gasket replacement. However, more severe pump issues, such as broken bearings, may necessitate a complete replacement of the faulty pump. Replacement Grundfos pumps, such as the ones used in Alpha boilers, cost approximately £250-£300 without labour. 

Given the high price of replacement, it may be wise to consider installing a new boiler if your old, out-of-warranty Alpha has a broken pump. Start your boiler search by getting a fixed-price, no-obligation quote from Heatable. You’re able to then use this online quote as a benchmark as you ring up local heating merchants.

6. Control Panel/PCB (Printed Circuit Board) in Alpha Boilers

The Printed Circuit Board (PCB) of an Alpha boiler is the boiler’s control centre that allows various electrical components to communicate as the boiler executes commands based on user inputs. A boiler’s PCB is an indispensable component without which a boiler is unable to function. Alpha boilers may use the following PCB variants, depending on the boiler model.

PCB part number Alpha boiler model
1.037031 E-Tec Plus 28/33/38 combi boiler
Evoke 28/33 combi boiler
E-Tec 20S/30S system boiler
1.045759 E-Tec NX 28/33 combi boiler
1.041489 E-Tec 15R/20R/25R regular boiler

Alpha’s PCBs are not known for any specific issues that cause them to malfunction. However, all boiler PCBs may develop faults from time to time. PCB faults may be caused by wiring connections that have come loose or detached over time, either due to wear and tear or because of the boiler vibrating. Leaks may additionally cause severe, irreparable damage to a boiler’s PCB. Replacing an Alpha PCB costs approximately £200-250, excluding labour.

7. Gas valve in Alpha boilers

The gas valve in Alpha boilers is an essential component that controls the supply of gas to the burner based on user commands related to central heating and domestic hot water (in combi boilers). Raising the temperature setting on the thermostat tells the boiler to begin heating water, and the boiler’s PCB processes and relays the command to several components, including the gas valve. The gas valve then ensures that the burner gets enough gas pressure to produce sufficient heat for reaching the desired water temperature quickly and efficiently. Turning on a hot water tap produces the same response from the gas valve in an Alpha combi boiler. Alpha boilers may contain the following gas valves, depending on the boiler model.

Gas valve part number Alpha boiler model
1.039944 E-Tec Plus 28/33/38 combi boiler
E-Tec 20S/30S system boiler
Evoke 28/33 combi boiler
E-Tec 15R/20R/25R regular boiler
1.047483 E-Tec NX 28/33 combi boiler

Alpha boiler gas valves have no known issues, although any boiler gas valve may develop faults over time. Typically gas valve faults stem from either loose wiring connections or wear and tear due to old age. A gas valve experiencing a wiring problem is a simple matter that a Gas Safe engineer should be able to repair. However, wear and tear often causes irreparable damage to boiler gas valves, which necessitates a replacement of the part. Typical replacement costs for an Alpha boiler gas valve range between £50 and £75, excluding labour.

8. Expansion vessel in Alpha boilers

An expansion vessel (also known as an “expansion tank”) in Alpha boilers are essential safety mechanisms that prevent excess pressure from building up. All Alpha combi and system boilers have integral expansion vessels that absorb and regulate the pressure changes that occur when the water heats up and cools down. Alpha regular boilers do not have expansion vessels inside their casings; instead, their system pressure is regulated by the feed and expansion tank, which additionally supplies cold water for the central heating system. Below are the two variations of integral expansion vessels found in Alpha combi and system boilers.

Expansion vessel part number Alpha boiler model
1.039208 E-Tec Plus 28/33/38 combi boiler
E-Tec 20S/30S system boiler
Evoke 28/32 combi boiler
1.044389 E-Tec NX 28/33 combi boiler

There are no common issues that are specific to Alpha boilers’ expansion vessels, which are zinc-coated for added corrosion resistance. However, all expansion vessels may develop leaks over time, and such leaks create a hazard for the boiler’s electrical components. Additionally, leaky expansion vessels allow the boiler pressure to drop below normal operating levels, thus reducing the boiler’s ability to heat the home efficiently. Repairing a faulty expansion vessel may be possible if it’s relatively new. However, a replacement is often necessary when the expansion tank exhibits a great deal of wear and tear. Alpha-compatible expansion vessels cost between £60 and £150, without labour.

9. Pressure relief valve in Alpha boilers

A pressure relief valve (PRV) in an Alpha boiler allows excess pressure to escape the heating system by letting out water. A PRV is calibrated to open when the heating water pressure rises above normal operating levels (normally above 3 bar). The PRV in most Alpha boiler models has a combined outlet with the condensate, which allows the fitter to get away with making fewer connections during installation. Alpha models E-Tec Plus/NX 28/33/38, 20S/30S, and Evoke 28/33 use the pressure relief valve with the part number 1.028561.

Alpha PRVs have no known quality issues, apart from issues that occasionally arise with all boiler PRVs. Typical PRV problems include water leakage due to worn-out seals, and malfunctions that cause the valve to either release water at low pressure, or failing to let water out when the pressure climbs gets too high. Age-related deterioration is the most common culprit behind boiler PRV failures. PRV problems are sometimes fixable if the root cause is minor enough, but a replacement is often necessary if the PRV has deteriorated due to age. A typical Alpha PRV costs £30-£50 without labour.

10. Overheat thermostats in Alpha boilers

Overheat thermostats in Alpha boilers monitor the boiler water temperature and shut the boiler’s output if the water gets hotter than required per the temperature setting. An overheat thermostat is an essential boiler component that prevents the boiler from overheating, becoming over-pressurised, and locking out. Different Alpha boilers have different versions of the overheat thermostat, as summarised in the table below.

Overheat thermostat part number Alpha boiler model
1.040935 E-Tec 15R/20R/25R regular boiler
1.016870 PRO Tec range of boilers

There are no documented quality issues with Alpha boiler overheat thermostats. However, overheat thermostats may break down due to age-related deterioration or faulty wiring, which may stem from the boiler’s vibrations. A malfunctioning overheat thermostat may either shut off the boiler before the water reaches its temperature threshold or fail to stop the water temperature from rising beyond the set limit. A Gas Safe engineer is able to determine whether the overheat thermostat may be repaired (in case of minor faults, like loose wiring), or whether a replacement is necessary. Replacement Alpha boiler overheat thermostats cost £15-£30 without labour.

11. Diverter valve in Alpha boilers

A diverter valve in Alpha combis is an important component that switches the boiler’s operation mode between central heating and hot water. The valve directs either heating or domestic hot water to one of the combi boiler’s two heat exchangers, one serving the central heating water and water producing hot water for the taps. Only Alpha combination boilers have a diverter valve, as system and regular boilers have an external valve connected to the heating and hot water pipework instead. Alpha E-Tec, E-Tec Plus, E-Tec NX, and Evoke combi boiler ranges have diverter valves, and these comprise two components with two distinct part numbers. Firstly, these boilers have a diverter valve cartridge (part number 3.025230), which holds the valve assembly together. Secondly, there valves have a motor (part number 1.033918), which activates the piston that actually switches the boiler’s function between central heating and domestic hot water.

Alpha boiler diverter valves are known to leak at times, according to a survey of heating engineers performed by Which?. Other common diverter valve faults that are not specific to Alpha boilers include seizures that cause the valve to become stuck in one position, leaving boiler users without heat or hot tap water. A Gas Safe heating engineer may be able to fix simple issues affecting the valve, such as faulty wiring or a valve that’s stuck. However, severely damaged or cracked valves require replacement. An Alpha diverter valve cartridge costs approximately £120, whilst the motor costs about £60, without labour.

12. Air vent in Alpha boilers

An air vent (sometimes called an “auto-air vent”) in Alpha boilers allows air trapped in the home’s heating system to escape. Air trapped inside the heating system (called an “air lock”) causes water circulation issues, prevents the radiators from heating up properly, and may cause the boiler or pipework to make noises. An air vent is a simple yet vital device that allows air locks to clear out without the boiler user needing to bleed radiators. Alpha boilers from the E-Tec, E-Tec Plus, E-Tec NX, and Evoke ranges utilise the air vent with the part number 1.027110.

There are no documented issues specific to air vents in Alpha boilers. Air vents of all boiler makes are known for getting their valves stuck on occasion, which may be a problem that’s simple enough for a heating engineer to fix on the spot. That said, air vents on older boilers may suffer from severe, irreparable wear-and-tear that prevents them from letting out air properly or causing water to leak out. A replacement Alpha auto-air vent costs £60-£70 without labour.

13. Condensate trap/drain in Alpha boilers

The condensate trap/drain in Alpha boilers allows the condensate created during the boiler’s operation to be released and drained outside the home via the condensate pipe. A well-built condensate trap is an essential component in all condensing boilers (including Alpha), since the condensate produced by these boilers is acidic and is able to damage surfaces with which it comes in contact over time. A condensate trap collects this condensate and releases it at certain intervals to prevent the condensate from freezing over in subzero temperatures. The table below shows the different variations of the condensate trap and drain used in different Alpha boiler models.

Condensate trap/drain part number Alpha boiler model
1.039244 E-Tec Plus 28/33/38 combi boiler
E-Tec 20S/30S system boiler
Evoke 28/33 combi boiler
1.043051 E-Tec NX 28/33 system boiler
1.037797 E-Tec 15R/20/25R regular boiler

The most common problem with a boiler’s condensate trap is debris accumulation and the resulting blockage, which often leads to the shutdown of the boiler. These types of blockages affect condensate traps of all boiler brands, not just Alpha. The fix is usually simple: a heating engineer simply has to remove the trap, clean it, and then reinstall it. However, a condensate trap may need to be replaced completely if it has severe damage due to wear and tear. Replacement condensate traps for Alpha boilers cost between £40 and £70, without labour.

14. Heat exchanger for Domestic Hot Water (DHW) in Alpha boilers

The heat exchanger for Domestic Hot Water (DHW) in Alpha boilers is a vital component that transfers heat from the burner to the water flowing from the mains to the home’s taps and showers. Only Alpha combination boilers have this separate heat exchanger, which is typically referred to as the “secondary plate heat exchanger”. Regular and system boilers do not require a secondary heat exchanger for DHW because they heat this water indirectly via a coil that passes through the hot water cylinder. Below is a table summarising the DHW heat exchanger variants and their corresponding Alpha combi boiler models.

Domestic heat exchanger part number Alpha combi boiler model
3.022783 E-Tec Plus 28
Evoke 28
3.021693 E-Tec Plus 33
Evoke 33
3.022784 E-Tec Plus 38
3.034535 E-Tec NX 28
3.034536 E-Tec NX 33

Alpha combis’ DHW heat exchangers have no known brand-specific faults. Alpha’s secondary heat exchangers are made with stainless steel, which is the ideal material for a component that needs to resist corrosion and heat-related stress. However, all DHW heat exchangers develop faults at times, which often stem from limescale buildup or age-related cracks. Replacing an Alpha boiler DHW heat exchanger costs between £180-£230, excluding labour.

15. Filling loop in Alpha boilers

The filling loop in Alpha boilers allows boiler users to top up their heating system pressure if it’s dropped below normal operating levels and the root cause of the drop has been rectified. A filling loop is a mechanism that connects the boiler (and subsequently the central heating system) to the mains water supply. Alpha’s E-Tec range boilers use the filling loop with the part number 3.023115, whilst other boilers must be topped up via an external filling loop.

Internal Alpha boiler filling loops, such as the ones used in the E-Tec range, are durable components that do not generally experience faults. However, a filling loop may become faulty after many years of service, in which case you need a Gas Safe engineer to inspect it and decide on a course of action. Replacing an Alpha boiler filling loop costs approximately £120, without labour.

16. Filters in Alpha boilers

Filters in Alpha boilers collect sludge to prevent it from building up inside the boiler’s components. Sludge buildup causes blockages inside various boiler parts through which central heating water circulates, and these blockages in turn damage the boiler and prevent it from operating efficiently. Alpha boilers are compatible with the Alpha Cyclone Plus filter, which uses both a magnet and centrifugal force to separate and filter out heating sludge. The boiler installer must fit the filter separately when installing the boiler, as it sits outside the boiler’s casing. Getting a Cyclone Plus filter installed with your Alpha boiler increases the boiler’s warranty by one year.

There are no quality concerns regarding Alpha’s Cyclone Plus filter. However, it’s important that this vital component gets cleaned at least once per year during your annual boiler service. Replacing a Cyclone filter that’s damaged and irreparable costs approximately £170-£200 without installation.

How is the customer service of the Alpha boilers manufacturer?

The customer service of the Alpha boilers manufacturer meets a high standard according to Alpha boiler users. Trustpilot reviews show that the vast majority of Alpha boiler owners are greatly satisfied with Alpha representative’s expertise, knowledge, and promptness of service. Trustpilot reviewers are particularly happy about Alpha’s boiler service, which they overwhelmingly describe as knowledgeable, quick, and effective at identifying faults early.

However, boiler installers have a far more negative view of Alpha’s customer support than consumers do. A study performed by Which? found that most heating engineers decry the technical support offered by Alpha to engineers, as it’s inconsistent and it often takes long to give assistance.

Alpha’s customer service is available by phone at 0344 871 8760, or via email at [email protected], whether you’re a consumer or installer.

Does customer service help with Alpha boiler installation?

Yes, customer service helps with Alpha boiler installation. Alpha customer service is available to provide verbal assistance to Gas Safe boiler fitters before, during, and after installation at 0344 871 8760, [email protected], or via Alpha’s online contact form. Alpha additionally offer installer training for Gas Safe heating engineers. Alpha’s Domestic Boiler Course takes installers through the course material listed below.

  • Installation and servicing
  • Advanced boiler diagnostics
  • Advanced education on core boiler components
  • Alpha’s boiler product portfolio
  • Fault-finding training
  • Optional accessories and add-ons
  • User controls overview

Are parts of Alpha boilers available for replacement?

Yes, parts of Alpha boilers are available for replacement. Alpha boiler parts are readily available at online heating merchants, such as https://www.boilerparts.co.uk/, https://www.dhsspares.co.uk/, and https://www.wolseley.co.uk/. A heating engineer may additionally find replacement Alpha components at the local heating merchant’s physical store. A study by Which? found that replacement Alpha boiler parts are remarkably easy to source, although their price tends to be on the higher end of the range.

Is it costly to repair Alpha boilers with a possible problem?

Whether it is costly to repair Alpha boilers with a possible problem depends on four factors. Firstly, repair costs depend on the nature of the problem, as some boiler components cost far more than others. For example, replacing a faulty overheat thermostat on an Alpha boiler should cost around £100 including labour. On the other hand, heat exchanger replacement is likely to set the boiler owner back anywhere between £500-700, including the labour needed to perform the swap. Overall, Alpha boiler spares are typically costly compared to replacement components of other brands, according to a study by Which?. Secondly, the repair costs depend on whom you’re using to fix the Alpha boiler. Smaller, local heating trades charge less on average than the more reputable, national heating companies. Thirdly, the Alpha boiler repair costs depend on your warranty status. Alpha boilers that are under warranty should incur minimal (if any) costs for covered repairs, whilst those out of warranty would require out-of-pocket repairs done at market prices. Finally, how much you spend to repair an Alpha boiler depends on whether you have boiler cover. Having boiler cover that protects the faulty component means that you only pay the callout fee (typically between £0 and £90), in addition to the monthly premiums. Having no boiler cover or warranty means that you must pay the full market price when repairing your Alpha boiler.

What are the Alpha Boiler error codes?

Alpha boiler error codes are coded messages unique to Alpha that appear on a boiler’s front display whenever there is a problem affecting the boiler’s ability to operate. There are four error codes that are the most common with Alpha boilers. Firstly, the Alpha boiler error code 01 represents a problem relating to ignition. The common cause for ignition problems in an Alpha boiler is a faulty gas supply or an issue with the lead flame sensor. Seeing error code 01 necessitates a visit from a Gas Safe engineer. You just address a 01 error code promptly, as it’s never safe to take risks with issues that involve the gas supply. Secondly, the Alpha E10 fault indicates a pressure problem in your boiler. Low pressure is often indicative of a leak somewhere in the system or a stuck pressure relief valve (which is often caused by a build-up of debris in the system). Calling a Gas Safe engineer is the best course of action upon seeing the E10 fault code on your Alpha boiler. Thirdly, seeing an Alpha E37 fault code indicates an issue with the electricity supply. Check the mains power supply to your boiler if you see the E37 fault code. Request a Gas Safe engineer to come and inspect the boiler if there are no obvious issues with the mains power. Fourthly, the Alpha boiler E43 fault code means there is a problem with a loss of flame rectification. In a combi boiler, the flame acts as a connection point and is where the current changes from AC to DC. An E43 code means the flame has gone out, and therefore, the current is not converted, and the boiler cannot function correctly. The E43 fault code is typically an issue with either the gas supply or one of the sensors inside the boiler. Calling a Gas Safe engineer is the only way to resolve the issue behind the E43 error.

The four error codes above are not the only fault codes that may appear on an Alpha boiler. Alpha boilers have a total of about 100 error codes between all the different models. These fault codes advise the user when the boiler has an identified component failure or is unable to function properly or safely.

How aesthetic is the design of the Alpha boilers?

The design of Alpha boilers is plain and minimalistic. Alpha boilers do not stand out with a sleek design or glossy casing surface, and there are no colours from which to choose (as you would with Worcester Greenstar 8000). All Alpha boiler models come in basic white and off-white colours. However, the unassuming aesthetic has no bearing on the boiler’s functionality, footprint, or ability to fit into small spaces.

The table below provides a summary of the sizes of the Alpha boiler range.

Alpha boiler model Height (mm) Width (mm) Depth (mm)
Alpha E-Tec 28kW combi boiler 712 440 255
Alpha E-Tec 33kW combi boiler 712 440 255
Alpha E-Tec Plus 28kW combi boiler 712 440 268
Alpha E-Tec Plus 33kW combi boiler 712 440 268
Alpha E-Tec Plus 38kW combi boiler 712 440 268
Alpha E-Tec NX 28kkW combi boiler 712 440 255
Alpha E-Tec NX 33kW combi boiler 712 440 255
Alpha Evoke 28kW combi boiler 712 440 255
Alpha Evoke 33kW combi boiler 712 440 255
Alpha E-Tec 20s system boiler 712 440 255
Alpha E-Tec 30s system boiler 712 440 255
Alpha E-Tec 35s system boiler 712 440 255
Alpha E-Tec 15R regular boiler 600 390 305
Alpha E-Tec 20R regular boiler 600 390 305
Alpha E-Tec 25R regular boiler 600 390 305

Does an Alpha boiler fit into the intended space?

Whether an Alpha boiler fits into the intended space depends on where you plan to install the boiler, and which Alpha boiler type you’re looking to purchase. Alpha markets all their boilers as compact, implying that they all fit into kitchen cupboards. However, this claim is technically incorrect because Alpha’s combi and system boilers surpass the accepted dimensions of a compact boiler, which are 700mm X 400mm X 300mm (H x W x D). The only genuinely compact Alpha boiler is the E-Tec regular, which measures just 600mm x 390mm x 305mm (H x W x D). Given their dimensions, Alpha combi and system boiler models fit into large kitchen wall cabinets, which typically have a size of 900mm in height, >500mm in width, and >350 in depth. Meanwhile, Alpha’s regular boilers additionally fit into the smallest of cupboards thanks to their truly compact dimensions.

Do Alpha boilers have an electronic control panel?

Yes, Alpha boilers have an electronic control panel. All Alpha boilers come with an electrically powered control panel that includes an LCD display screen and push buttons. The LCD display shows vital information about the boiler’s settings, operational status, and fault codes that may signal a component failure or other issues with the boiler’s functionality. The push buttons allow the boiler user to adjust settings and perform the following tasks on the boiler.

  • Change between winter and summer modes: The push buttons and the LCD display let the user switch between the boiler’s summer (hot water-only) and winter (hot water and heat) settings.
  • Adjust temperature settings: The user or a heating engineer is able to use the buttons and LCD display to adjust the boiler’s domestic water and heating flow water temperatures.
  • Set the boiler’s timer: The push buttons and LCD screen enable the user to program the boiler’s timer.
  • Reset the boiler: The user may reset the boiler in the event of a lockout by using the push buttons on the electronic control panel.

What are the alternatives to Alpha boilers?

Below are the three alternatives to Alpha boilers.

  • Ideal boilers: Ideal boilers are an alternative to Alpha for three reasons. Firstly, Ideal boilers have a similar, mid-range price range as Alpha, with most models costing between £800 and 1,000. Secondly, Ideal boilers come with warranty terms of similar lengths to Alpha’s, ranging between 7 and 12 years for most models. Finally, Ideal boilers are generally considered to be a quality budget-friendly boiler brand, much like Alpha. Which? studies show that 85% of Ideal boiler owners are satisfied with their boilers, which is a relatively high level of satisfaction among industry-leading brands.
  • Baxi boilers: Baxi boilers are an alternative to their Alpha counterparts because they have a rock-solid reputation for quality and affordability. Baxi’s boilers have similar price points to Alpha’s, ranging between £700 and £1,100, and their quality is of a relatively high standard. Studies performed by Which? demonstrate that 81% of Baxi boilers continue to operate fault-free after the first six years of service, which gives Baxi a slight edge over Alpha, whose boilers have a 75% chance of working without errors during their first six years.
  • Worcester Bosch: Worcester Bosch boilers offer a pricier alternative to Alpha, although the higher price point comes with three key advantages. Firstly, Worcester Boilers have a remarkable track record in durability. Which? found that 85% of Worcester boiler owners have not experienced a single fault with their boiler during the first six years of operation. Secondly, Worcester boilers come with a guarantee instead of a warranty. The guarantee stipulates the manufacturer’s commitment to fixing faults that occur within the term instead of merely assessing them, which is what most boiler warranties offer. Finally, those with a Worcester boiler are some of the happiest boiler owners in the UK, with 87% of Worcester boiler owners reporting being highly satisfied with their appliance.

Try using Heatable’s online boiler selection tool if you’re not sure whether Alpha or another boiler brand are most suitable for your home and heating needs. The tool requires you to answer a few (anonymous) questions regarding your property and heating setup and generates a list of suitable boiler models and fixed-price quotes.

How do Alpha boilers compare to other boiler brands in the UK?

Alpha boilers offer lower price points than the more premium boiler brands in the UK, whilst their quality is substantially higher than that of the nation’s cheapest, budget brands. Consequently, Alpha offer some of the best boilers in the UK. Below is a list of the two major advantages Alpha boilers have over other boiler manufacturers in the UK.

  • Excellent value for money: Alpha boilers offer top value for money, thanks to a relatively low price point that’s balanced with a quality build and relatively high durability. Alpha boilers on average cost about 30% less than leading brands, such as Worcester or Viessmann. The lower price range does impact Alpha boilers’ ability to operate fault-free, however, as about ¾ of all Alpha boilers in service do not develop faults in their first six years of operation. Alpha boilers additionally come with warranties that match and even surpass those of premium boiler manufacturers in the UK.
  • Long standard warranties: Alpha boilers have impressively long warranty terms considering their budget-friendly pricing. Alpha’s flagship combi boiler range, E-Tec Plus, comes with 13-year standard warranties, which surpass those offered by Worcester Bosch and Viessmann equivalents. Long warranties generally reflect a boiler’s high reliability and indicate the manufacturer’s faith in their product. Paying a budget price for a boiler with a 13-year warranty is an incredible deal on the UK market.

What do HeatingForce experts think about Alpha boilers?

Our experts at HeatingForce think that Alpha boilers offer excellent value for money, and give the manufacturer’s boilers a relatively high rating of 4.3 out of 5.0. We’ve based our rating on the five considerations listed below.

  • Price and performance efficiency (4.8/5.0): HeatingForce gives Alpha boilers a high rating on price and performance efficiency for two reasons. Firstly, Alpha’s boiler prices are more than reasonable, being roughly 30% less than the nation’s leading brands whilst showcasing impressive quality and performance metrics. Secondly, Alpha’s boilers are highly fuel efficient, with an average heating efficiency of 93%. Such a high efficiency rating means that 93p of every pound spent on gas gets converted into usable heat by the boiler. This ability to waste little fuel translates into tangible savings for boiler owners, especially if they upgrade to a new Alpha from a lower-efficiency boiler.
  • Design (4.0/5.0): Our experts at HeatingForce give Alpha boilers 4.0 points out of 5.0 on design for two reasons. Firstly, Alpha boilers have well-built components, such as the highly durable stainless steel heat exchanger that comes with its own, 10-year warranty. This high-quality component design meets and exceeds the standards set by boiler brands known for their reliability, such as Viessmann. Overall, Alpha boilers’ internal parts are not known to have any serious or recurring issues, which in itself speaks to the boilers’ stellar design. Secondly, we think highly of Alpha boilers’ design because all of the boilers come with a small footprint. Not all Alpha boilers are “compact” per the industry standard, but all models fit in and between midsize and large kitchen cabinets. However, we deduct one point from our rating because Alpha’s aesthetics are rather plain: the boilers have a basic-looking casing with a rudimentary LCD display. These features are no match for the smooth and glossy exteriors of its Worcester and Viessmann contenders, nor their full-colour LED displays.
  • Customer service (3.0/5.0): We give Alpha a modest rating on customer service based on the uneven consumer and installer reviews that paint a decidedly mixed picture. On the one hand, the vast majority of Alpha boiler owners are highly satisfied with the aftercare they receive from Alpha Heating Innovation. On the other hand, Alpha boiler installers are largely dissatisfied with installation and repair support from the manufacturer.
  • Safety (5.0/5.0): Alpha boilers get our highest ranking for safety for two reasons. Firstly, Alpha boilers are manufactured to all the modern, applicable British standards. Secondly, there have been no known safety issues with these boilers to date, so there is absolutely no reason to doubt the safety of Alpha boilers.
  • Warranty duration: (5.0/5.0): We give Alpha our top marks for warranty duration. Alpha’s flagship combi boiler range comes with a 13-year warranty, a term length that surpasses most warranties offered by premium UK boiler makers, including Worcester Bosch and Viessmann. Alpha’s mid-range and budget boiler likewise come with generous warranty terms of 5-7 years, a length that meets and exceeds industry standards.

What to know before purchasing a brand-new Alpha boiler?

You should know the following four things before purchasing a brand-new Alpha boiler. Firstly, keep in mind that although Alpha’s warranty terms are overall generous, not all their boilers come with long warranties. It’s worth spending the extra £100 to get an E-Tec Plus instead of the E-Tec since the former comes with a 13-year warranty whilst the latter’s term is only 7 years. The hundred quid here is a small price to pay for an added 6 years of protection and peace of mind. Secondly, make sure you size your Alpha boiler correctly and opt for the right boiler type if you want it to operate at peak efficiency and keep your indoor home environment as comfortable as possible. Boilers that are too small in their kW output struggle to heat a space efficiently and wear out their internal components faster by placing them under undue stress as they try to keep up with the elusive temperature targets. Meanwhile, oversized boilers burn far too much fuel than they need to and cost more upfront. Additionally, getting an Alpha of the correct type is essential for meeting your domestic hot water needs. Alpha combination boilers are ideal for smaller properties and households with modest hot water consumption. In contrast, system and heat-only boilers from Alpha are optimal for larger homes and families that consume lots of hot water simultaneously. Thirdly, be sure to measure the space where you intend to fit your brand-new Alpha and see how the dimensions align with the size of your chosen boiler model. Alpha boilers have a small footprint, but not all of them are compact, meaning that not all of the models are small enough to fit into a standard kitchen cupboard. Fourthly, consider whom you will use to install your brand-new Alpha boiler. National heating companies (such as British Gas) charge significantly more for boiler installations than local heating trades or online installers. We recommend that you start your installer search by getting a free, no-obligation Alpha boiler quote from Heatable, a reputable national online boiler installation company. It takes a mere 90 seconds to get a fixed-price boiler quote from Heatable, which you’re then able to use as a benchmark when speaking with local Gas Safe boiler installers.

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Are Alpha boilers reliable?

Yes, Alpha boilers are generally reliable. However, their reliability falls a bit below the average for all boiler manufacturers available in the UK. A study conducted by Which? reveals that 75% of Alpha boilers operate fault-free in their first six years of service, whilst the national average for all boiler brands is 5% higher, at 80%. In contrast, 85% of Worcester Bosch and Ideal boilers continued to run error-free after six years of service.