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Worcester Bosch Greenstar 8000 Life and Style Sizes, Features, Prices, and Alternatives (2024 Review)

The Greenstar 8000 is a boiler range from Worcester Bosch that’s split into two similar but distinct line-ups: Life and Style. Greenstar 8000 Life are a direct descendant of the Greenstar CDi range, whilst Greenstar 8000 Style are their more premium counterparts with a focus on user-friendliness.

Worcester Greenstar 8000
Worcester Bosch Greenstar 8000 review

Greenstar 8000 range comes in a variety of sizes and boiler types. The Greenstar 8000 Life offers 40kW/45kW/50kW combination boilers, a 35kW system boiler, and 35kW/40kW/45kW/50kW regular boilers. The Greenstar 8000 Style, on the other hand, offers 30kW/35kW/40kW/45kW/50kW combination boilers and 30kW/35kW system boilers.

Both the Life and Style lineups of the Greenstar 8000 range are highly durable boilers. The durability of the Greenstar 8000 range stems from the boilers’ quality components (notably the heat exchanger), the boilers’ ability to modulate, and Worcester’s professional installation services. Greenstar 8000’s 12-year parts-and-labour guarantee and its part-specific 10-year heat exchanger warranty are a testament to the durability of the boilers in this range.

The Greenstar 8000 range boasts industry-leading energy efficiency for both space heating and hot water. The boilers’ space heating efficiency is 94% whilst the hot water efficiency is rated “A”. Both of these ratings are in line with modern efficiency standards, and both directly reduce how much you spend on your energy bills.

The Worcester Bosch Greenstar 8000 range offers homeowners the four key features and benefits below.

  • Intelligent Filling System: This system tops the boiler up automatically when it loses pressure.
  • Easy maintenance: Greenstar 8000 boilers have easily removable panels for easy (and inexpensive) service and repairs.
  • Wireless control options: Both Life and Style lineups are compatible with various wireless (and wired) thermostats, including proprietary Bosch controls and third-party alternatives.
  • User-friendly LCD display: Worcester 8000 boilers have simple, intuitive LCD displays that make it easy to adjust various settings on the boiler. On the Style, advanced temperature controls and troubleshooting functions make it easy to manage your boiler your way.

The installation costs for Greenstar 8000 boilers range from £3,000 to £3,500, including the boiler and installation. The prices vary depending on three broad factors. First, higher-capacity models cost a bit more than their lower-output peers. Second, established, national boiler fitters charge more than local or online boiler installers. Finally, the site-specific conditions can drive the cost of a Greenstar 8000 up or down. For example, installing your Worcester 8000 in a new place inflates your bill, whilst keeping the boiler in the same place keeps the costs down.

Boilers in the Greenstar 8000 range are suitable for a large assortment of property types and households with varying heating demands. However, the 8000 range is quite pricey compared to equivalents from other boiler brands and even Worcester’s own boilers.

The best alternative for the Greenstar 8000 range comes from Viessmann Vitodens 100-W. The boilers’ mid-range outputs are similar, as are the flow rates, physical dimensions, and other parameters. The installation costs for Vitodens 100-W and Greenstar 8000 are similar, too.

What are the key benefits of the Greenstar 8000 Life?

The following are six key benefits of The Greenstar 8000 Life.

  • 12-year guarantee: The Greenstar 8000 Life comes with a standard 5-year guarantee that increases to 12 years if you use a local Worcester-accredited installer and use a Greenstar system filter. Such a long warranty term speaks to the durability of the product and protects your investment for over a decade.
  • High energy efficiency: The Greenstar 8000 boilers have a seasonal space heating efficiency of 94%, thus ensuring that 94p of every pound you spend on gas is converted to heat.
  • Advanced remote control system: The Greenstar 8000 comes with an easy-to-use LED display and remote control systems that allow you to adjust your boiler settings when you’re in or out of the house.
  • Modern sleek design: The Greenstar 8000 Life comes in glossy white while the Style comes in black and white. Both models look sleek enough that you won’t want to hide them in a closet.
  • Optional Intelligent Filling System: The Greenstar 8000’s Intelligent Filling System automatically monitors your boiler’s water pressure and refills the system as needed. This intelligent function ensures your boiler doesn’t operate with low pressure.
  • Brand security: Worcester Bosch are one of the most well-regarded boiler brands on the market. Rest assured that a premium Worcester boiler such as the Greenstar 8000 is well-built and expertly serviced.
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What is the difference between Greenstar 8000 Life and Style?

There are four differences between Greenstar 8000 Life and Style. Firstly, the Life models come only in white colour, whilst the Style models come in black or white. Secondly, the Life models are available as combi, system, and regular boilers, whilst the Style models do not include a regular boiler type. Thirdly, the Greenstar 8000 Style boiler comes in more sizes (heating outputs) than its Life counterpart. Finally, the Style comes with a more advanced full-touch display and a more intuitive navigation system. Style’s controls allow you to run simple diagnostics yourself, minimising the need for additional callouts.

What sizes does the Worcester Bosch Greenstar 8000 come in?

The Worcester Bosch Greenstar 8000 comes in five sizes: 30kW, 35kW, 40 kW, 45 kW, and 50 kW. These five boiler sizes represent the domestic hot water heating capacity for combi boilers and central heating capacity for system and regular boilers. The size ranges vary slightly between Greenstar 8000’s combi, system, and regular boilers, and between the LIfe and Style models.

Below are three tables with all available sizes of the Greenstar 8000, along with their specifications, for combination, system, and regular boiler.

What are the Greenstar 8000 combi boiler sizes?

The Greenstar 8000 combi boiler sizes are listed in the table below, along with the specifications for each boiler size.

Worcester Bosch Greenstar 8000 Combination Boilers Sizes and Specifications
Specifications 30kW Style 35kW








Depth (mm) 365 365 365 365 365
Height (mm) 780 780 780 780 780
Width (mm) 440 440 440 440 440
Seasonal Heating Efficiency Rating 94% 94% 94% 94% 94%
Hot Water Efficiency Rating A A A A A
Maximum Central Heating Output 30kW 35kW 35kW 35kW 35kW
Hot Water Flow Rate (35°C) 12.3 l/min 14.3 l/min 16.4 l/min 18.3 l/min 20.3 l/min
Hot Water Flow Rate (40°C) 10.7 l/min 12.5 l/min 14.3 l/min 16.1 l/min 17.9 l/min
Noise Level (dB) 53 53 53 53 53
Solar Compatible No No No No No
Guarantee Length 12 years* 12 years* 12 years* 12 years* 12 years*
Suitable properties 1-3 beds, 1 bath, ~15 radiators 2-4 beds, 2 baths, 15-20 radiators 2-4 beds, 2+ bathrooms, 15-20 radiators 2-4 beds, 3+ bathrooms, 15-20 radiators 2-4 beds, 4+ bathrooms, 15-20 radiators
*With Worcester Bosch-accredited installer

What are the Worcester Greenstar 8000 system boiler sizes?

The Worcester Greenstar 8000 system boiler sizes are presented in the following table along with the specifications for each size of boiler.

Worcester Bosch Greenstar 8000 System Boilers Sizes and Specifications
Specifications 30kW Style 35kW Life/Style
Depth (mm) 365 365
Height (mm) 780 780
Width (mm) 440 440
Energy Rating 94% 94%
Efficiency Rating A A
Noise Level (dB) 53 53
Solar Compatible No Life only
Guarantee Length 12 years* 12 years*
Suitable properties 1-3 beds, 2 baths, ~15 radiators 2-4 beds, 2 baths, 15-20 radiators
*With Worcester Bosch-accredited installer

What are the Worcester Bosch Greenstar 8000 regular boiler sizes?

Below is a table with the Worcester Bosch Greenstar 8000 regular boiler sizes and specifications.

Worcester Bosch Greenstar 8000 Regular Boilers Sizes and Specifications
Specifications 35kW Life 40kW Life 45kW Life 50kW Life
Depth (mm) 365 365 365 365
Height (mm) 780 780 780 780
Width (mm) 440 440 440 440
Energy Rating 94% 94% 94% 94%
Efficiency Rating A A A A
Noise Level (dB) 53 53 53 53
Solar Compatible Yes Yes Yes Yes
Guarantee Length 12 years* 12 years* 12 years* 12 years*
Suitable properties 1-3 beds, 2 baths, ~15 radiators 2-4 beds, 2 baths, ~20 radiators 4+ beds, 3+ baths, 20+ radiators 5+ beds, 4+ baths, 20+ radiators
*With Worcester Bosch-accredited installer

What Greenstar 8000 size do I need?

The Greenstar 8000 size you need depends on the following two factors.

  • Your property size: Large properties require boilers with a central heating output that’s high enough to serve all of the home’s radiators and keep the interior temperatures at the desired level.
  • Your hot water demand: The more hot water your household uses, the higher the hot water heating output and flow rate your boiler requires. Families with a particularly high hot water demand (i.e. those that often run multiple taps and showers simultaneously) need a large-sized regular or system boiler – a high-capacity combi may not suffice.

There are two ways for you to establish an accurate Greenstar 8000 boiler size for your home. First, you have the option of calling out a heating engineer to come and survey your property. Such a callout may cost you money and you will likely have to wait for an appointment. Second, you’re able to use Heatable’s online boiler calculator to get an accurate size on your screen now. The calculator asks for key parameters, including the number of bathrooms, radiators, bedrooms, and shower cubicles, before calculating the appropriate boiler size.

Is the Worcester Bosch Greenstar 8000 Life durable?

Yes, the Worcester Bosch Greenstar 8000 is durable for three reasons. First, the Greenstar 8000 has a 10 to 1 modulation ratio that reduces part wear and tear by limiting the number of times the boiler has to start and stop. Second, Worcester-accredited technicians are well-trained to make sure your boiler is installed correctly. Worcester backs up the durability of its boilers with an impressive 12-year warranty if they’re installed by a Worcester-accredited engineer. Third, the Greenstar heat exchanger comes with a 10-year warranty, which is an indicator of Worcester’s confidence in its durability. Heat exchangers are notoriously expensive to replace, so the 10-year heat exchanger warranty protects you from high, unexpected repair costs for a long time after you install the boiler.

1:10 modulation ratio

The Worcester Bosch Greenstar 8000 has a modulation ratio of 1:10. This modulation ratio means that the boiler is able to operate at 10 heating output levels, ranging from the minimum to the maximum. For example, the Greenstar 8000 35kW can operate at ten different output levels with a minimum of 3.5kW and a maximum of 35kW.

The ability to operate at different output levels means that the boiler doesn’t need to shut down and start again in response to thermostat commands. This ability to modulate has two primary benefits. First, the modulation protects the boiler’s parts from damage caused by constant on/off cycling. A boiler’s parts cool when the boiler turns off and heat up when it turns on. This fluctuation in temperature expands and contracts the components’ materials, weakening them in the process. The Greenstar 8000’s ability to modulate keeps the boiler’s components at a stable temperature and thus protects them from damage. Second, a modulating boiler conserves more fuel than a boiler that goes through multiple start-up/shutdown cycles.

Aluminium heat exchanger

The Greenstar 8000 comes with an aluminium heat exchanger that’s covered by a separate, 10-year warranty. Whether aluminium is a more suitable material for heat exchangers is up for debate, and reputable boiler brands use both materials to make highly reliable heat exchangers. Aluminium heat exchangers last long if they are properly maintained, but are more susceptible to incidental damage than their stainless steel peers. However, Worcester Bosch provides a 10-year warranty for the heat exchanger specifically. This long part-specific warranty shows that Worcester are confident in their heat exchanger’s reliability.

Professional installation

Worcester boilers come with the highest quality professional installation. Worcester require you to use installers they’ve accredited to secure their longest warranty since poor installation is one of the leading causes of later repair issues. Using installers accredited by the boiler manufacturer with a leading reputation in the industry minimises the risk of boiler faults.

Worcester Greenstar 8000 is a durable boiler, but extending its lifespan, even more, is entirely in your power. One easy way to protect your Worcester 8000 from defects is to service the boiler regularly. Boiler service flags problems before they become expensive emergencies and are a requirement of the Greenstar 8000’s warranty. The cost of boiler service is usually around 100 pounds, which is a small price to pay to keep the boiler in tip-top shape and ensure the validity of the warranty.

Is the Worcester Greenstar 8000 energy-efficient?

Yes, the Worcester Greenstar 8000 is highly energy-efficient. All boiler types and capacities in the range share the same energy efficiency rating of A at 94% seasonal space heating energy efficiency.

Boiler space heating efficiency is a measure of how much energy it should take to heat a space compared to the actual amount of energy the boiler uses. The amount of energy required to heat space changes depending on the season, hence the “seasonal” nature of the metric. 100% space heating efficiency is impossible to achieve because there will always be some heat lost in the process of boiling and maintaining the temperature of the water. So, Worcester’s 94% is quite a high energy efficiency rating by industry standards.

The following four features contribute to the high energy efficiency of the Greenstar 8000 boiler range.

  • Eco Mode: Greenstar’s controls allow you to set your boiler to Eco Mode. This state optimises energy efficiency so you can reduce your impact on the environment.
  • Remote control of heating: The Greenstar’s remote control and smart home features allow you to adjust your boiler’s settings at your convenience. This remote control allows you to easily reduce its energy consumption when you are out of the house, saving you money.
  • Modulation: Modulation allows Greenstar 8000 boilers to adjust their output based on demand instead of turning off and starting up on maximum output, thus conserving fuel.
  • Condensing operation: The Greenstar 8000 is a condensing boiler that recycles excess vapours and uses them to warm water. This process saves potentially wasted energy and puts it to use.

Eco Mode

All models of the Greenstar 8000 come with the Eco Mode setting. Eco Mode disables the fuel-consuming Preheat function, which keeps the heat exchanger warm to reduce hot water delivery time. Disabling the Preheat function improves your boiler’s energy efficiency dramatically. However, you have to wait longer to get warm water as it takes more time to heat up when you turn on the taps.

Remote control

Greenstar 8000’s remote controls enable you to fine-tune your boiler’s heating output as required from your smartphone. Monitoring and controlling the boiler’s heat output allows you to cut down on inefficiencies, such as the boiler continuing to run at full blast when you already feel warm.


Modulation allows a Greenstar 8000 boiler to reduce and increase heating output in increments instead of constantly shutting down and firing back up. Precise control over the heating output decreases the boiler’s overall fuel consumption and improves its energy efficiency.

Condensing operation

All Greenstar 8000 models are condensing boilers, which are more energy-efficient than traditional, non-condensing boilers when operated correctly. Traditional boilers dispose of the excess fumes and water vapour produced when fuel burns through the boiler’s flue. However, these exhaust gases contain a lot of heat, all of which is lost through the flue. A condensing boiler like the Greenstar 8000 captures these fumes into what is known as the primary circuit. This circuit then returns the latent heat from these gases to the boiler, reducing the waste of heat and fuel consumption in the process.

How does Greenstar 8000 save money on energy bills?

Greenstar 8000 saves money on energy bills thanks to its 94% energy efficiency. This high level of energy efficiency means that for every pound spent on gas, a Greenstar 8000 boiler is able to convert 94p to heat. A 94% energy efficiency means that replacing an old, inefficient boiler with a Greenstar 8000 can produce sizable savings on annual energy bills. The energy savings that result from an upgrade to an efficient boiler may be as high as £840 per year, according to the Energy Saving Trust.

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What are the main features of the Greenstar 8000?

Below are the four main features of the Greenstar 8000.

  • Intelligent filling system: The intelligent filling system monitors your boiler’s pressure and adjusts the amount of water in the system. This filling system ensures you have fewer low-pressure problems and fewer call-outs.
  • Wireless control: The Greenstar comes with smart thermostat controls that connect wirelessly to your smartphone. This remote control option allows you to adjust your heating and hot water wherever you are.
  • Easy maintenance. Worcester designed The Greenstar with easy repairs in mind. Removable panels and easily accessible components make repairs speedy and inexpensive.
  • Full colour, touchscreen display. Greenstar 8000 Style units come with an easy-to-use, full-brightness display that makes it easy for non-technical users to troubleshoot issues.

Intelligent Filling System

Greenstar 8000’s Intelligent Filling System monitors your boiler’s water levels and tops it up to maintain optimum pressure. Automatic refillings mean fewer callouts when your boiler loses pressure.

However, pay attention if your boiler is having to continuously top itself up to maintain pressure. Constant loss of pressure is a sign of deeper problems with your boiler – typically a boiler leak.

Wireless Bosch EasyControl

The wireless Bosch EasyControl is an internet-connected room thermostat that integrates with your smart home. You’re able to use EasyControl to adjust thermostat settings through your Amazon Alexa or Google Assistant, or through a mobile app. The mobile app allows you to adjust the thermostat settings whether you’re at home or on the go.

The Greenstar 8000 range is fully compatible with other thermostats besides Bosch EasyControl. The compatible Worcester controls include Wave Smart Control and the Greenstar comfort, whilst the boilers also work with third-party thermostats like the Hive and Nest.

Easy maintenance

The Greenstar 8000 is easy to maintain and service, so repair bills are generally reasonable thanks to the lower costs of labour. The Greenstar 8000 range is simple to maintain and service because of the boilers’ easy-to-remove top and side panels. These removable panels provide technicians with quick access to all of the boiler’s internal components. The boiler’s internal components are labelled clearly using large, bright-green signage.

The control mechanisms are easy to disassemble and technicians are able to access the wiring without needing to remove any screws. All these small touches might seem minor, but make repairs quicker and easier. Fast and simple repairs generally translate into lower repair bills, as technicians spend less time and charge you less for labour.

Full-colour display

The Greenstar 8000 Style has a full-colour display that streamlines your boiler controls in two ways. First, the interface gives you access to several key settings that allow you to fine-tune your boiler’s performance. For example, the display gives you a simple way to adjust the heating and hot water temperature so you can balance comfort and energy efficiency. Second, the Greenstar 8000 display has an intuitive design that makes it easy to navigate through the settings without reaching for the boiler manual.

What does it cost to install a Worcester Bosch Greenstar 8000?

It costs around £3,200-£3,500 to install a Worcester Bosch Greenstar 8000. This installation cost includes the boiler, a Gas Safe installation, standard controls, the flue, and all other boiler components. This price range is based on like-for-like boiler replacement, assuming your boiler is not changing location on your property. Note that the actual prices will fluctuate within this range based on the following five factors.

  • Location: The costs of installing a boiler vary depending on location. London is the most expensive place in the UK to install a boiler, while areas like South Wales are considerably less expensive.
  • Installer: National heating companies (such as British Gas) charge more to install boilers than most local heating trades or online installers like Heatable. Online installers generally charge less to fit boilers because they have low overheads, and are thus able to pass the savings to the consumer in order to stay competitive. You can fill out Heatable’s online questionnaire to see what they’ll charge you to install a new Greenstar 8000.
  • Scope of work: Expect higher installation costs if you plan on relocating your boiler within your home or changing the placement of your boiler’s flue. Additionally, changing to a new type of boiler comes with higher installation costs as the fitters have to change install (or remove) water storage facilities.
  • Warranty: The terms of Worcester Bosch’s 12-year guarantee require you to use a Worcester-accredited installer. Otherwise, your boiler’s warranty will be just 5 years. The installation can cost several hundred pounds more for a Worcester-accredited installer but the long-term savings on repairs tend to make up for it.
  • Extras: Adding optional extras like radiator replacement or thermostat installation to your boiler set-up drives up installation costs.
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How to find the best possible price on a new Worcester Greenstar 8000?

You can find the best possible price on a new Worcester Greenstar 8000 by going through a company like Heatable. Heatable offer some of the best boiler installation deals on the market for two reasons. First, Heatable do not operate a physical storefront and pass those savings on to you, the consumer. Second, Heatable cut down on new boiler costs by sourcing boilers directly from the manufacturers rather than going through a third party.

Heatable fit boilers across England, Wales, and Scotland, and readily available in your area (unless you’re in Northern Ireland). You can fill out this anonymous property questionnaire to get a Greenstar 8000 quote from Heatable on your screen in only 90 seconds.

How long is the Greenstar 8000 warranty?

The Greenstar 8000 warranty ranges between 5 and 12 years, depending on who installs your boiler. You have three warranty options within this 5-12-year range. First, Worcester Bosch offer a standard 5-year warranty on the Greenstar 8000, which you get by using a third-party installer not accredited by Worcerster. Second, using a Worcester-accredited installer boosts your warranty to 12 years, but you pay a bit of a premium for this option. Third, you’re able to get a 10-year warranty by installing your Greenstar 8000 through Heatable. We recommend getting quotes from at least three installers to see how the warranty terms balance with the installation costs.

Is Worcester Greenstar 8000 a suitable boiler for me?

The following are three factors that determine if the Worcester Greenstar 8000 Life is a suitable boiler for you.

  • Is the boiler big enough for your property? The Worcester Greenstar 8000 Life comes in a variety of sizes to suit different properties. The smallest boiler is suitable for a 10-radiator property with one to three bedrooms, whilst the largest is better suited to a 20-radiator property with 5 bedrooms. You may want to look for alternatives if your property is considerably larger or smaller.
  • Does the boiler meet your hot tap water demands? The Greenstar 8000 comes in a range of hot water capacities and flow rates. The smallest Greenstar 8000 combi works well for a modest-sized property with one-two bathrooms and a shower cubicle. In contrast, the largest Greenstar 8000 regular boiler easily serves multiple bathrooms and hot water taps that run simultaneously. The Greenstar 8000 boiler range may be overkill for you if you live in a small flat, where an Ideal Logic C24 combi may be far more suitable.
  • Are you willing to pay a premium for a high-quality boiler? Worcester Bosch produces market-leading boilers but that quality doesn’t come cheap. You may want to consider more affordable Worcester models like the Greenstar 4000 (> £3,000 to install) cost or the Ideal Logic ~£2,800 to install) if you’re on a budget.
Worcester Bosch Greenstar 4000
Consider a Worcester Greenstar 4000 instead of a Greenstar 8000 to save money on a new Worcester boiler

What is the best alternative to the Greenstar 8000?

The best alternative to the Greenstar 8000 is the Viessmann Vitodens 100-W range. The boiler ranges have similar specifications and cost a similar amount to install – around £3,500.

Viessmann Vitodens 100-W is an alternative to Greenstar 8000

Below is a comparison of specifications between the Greenstar 8000 and the Vitodens 100-W.

Specifications Greenstar 8000 Vitodens 100-W
Depth(mm) 365 400
Height(mm) 780 768
Width(mm) 440 400
Energy Rating 94% 95%
Boiler Outputs 30kW – 50kW 19kW – 35 kW
Boiler Type system, combi system, combi
Hot Water Flow Rate (l/min) 10.7 – 17.9 l/min 14 l/min
Efficiency Rating A A
Noise Level (dB) 53 46.9 – 51.6
Warranty 12 Years 10 Years

Is the Worcester Bosch Greenstar 8000 worth it? (Review Verdict)

The Worcester Bosch Greenstar 8000 is worth it to anyone seeking a top-of-the-line boiler that lasts for years with minimal repairs. Both Greenstar 8000 Life and Style lines provide sufficient hot water and heating for a typical family home and offer a range of boiler types for maximum installation flexibility.

There are four major benefits of the Worcester Bosch Greenstar 8000 Life. First, the Greenstar 8000 is a high-quality, durable product that comes with a 12-year warranty when installed by a Worcester-accredited installer. Second, this boiler is highly energy efficient which will both save you money and reduce your carbon footprint. The 94% energy efficiency rating for the combi model is exceptional by industry standards. Third, Greenstar 8000 comes packed with high-tech features that integrate it perfectly into any smart home. Finally, the sleek and elegant design makes Greenstar 8000 a natural fit for a beautifully designed home. You won’t want to hide this boiler away in a storage closet.

The Worcester Bosch Greenstar 8000 Life has one major drawback: its high price. The boiler itself is expensive and installation costs are high. Additionally, the 12-year warranty is only valid with a Worcester-accredited installer, which further drives up installation costs. You can get your quote for a Worcester Bosch Greenstar 8000 by filling in Heatable’s anonymous form.

Worcester Bosch Greenstar 8000 FAQs

We answer some of the most frequently asked questions about the Greenstar 8000 below.

What is the difference between Worcester Greenstar 4000 and 8000?

There are two differences between the Worcester Greenstar 4000 and the 8000. First, the Greenstar 4000 has only lower-capacity models. The 4000 comes in only two power outputs: the 25kW and 30kW while the 8000 has five power outputs with the smallest being the 30kW. This size range makes the 4000 more appropriate for smaller homes. Second, the Greenstar 4000 is much cheaper than the 8000. The 4000 costs roughly £2,800 to install, whereas the 8000 model costs around £3,500.

What is the difference between Worcester Greenstar 2000 and 8000?

There are three differences between the Worcester Greenstar 200 and 8000. First, the 2000 has fewer size options. The 2000 comes in 25kW and 30kW outputs while the 8000 has 30, 35, 40, 45, and 50 kW output options. Second, the Greenstar 2000 has a 6-year warranty compared to the 12-year warranty of the Greenstar 8000. This difference in warranty lengths indicates a potentially lower quality of the 2000. Third, the Greenstar 2000 is cheaper than the 8000. A Greenstar 2000 costs roughly £2,800 to install. This cost is considerably cheaper than the £3,500 price tag to install the 8000 model.

How many radiators can a Worcester 8000 run?

The number of radiators a Worcester 8000 can run depends on the size you purchase. The boiler size-to-radiators ratios for the Greenstar 8000 range are listed below.

  • 30kW: 10-15 radiators.
  • 30kW: 10-15 radiators.
  • 35-50kW: 15-20 radiators.

These size ratings represent the domestic hot water output, not central heating capacity. Worcester’s models rated 35kW/40kW/45kW/50kW all have the same central heating output of 35kW, which is why they’re able to serve the same quantity of radiators.

Is Greenstar 8000 a condensing boiler?

Yes, the Worcester Bosch Greenstar 8000 Style is a condensing boiler. Greenstar 8000 boilers are designed to operate more efficiently by capturing and reusing the latent heat from the exhaust gases. All modern boilers produced after 2005 are condensing.

How do I reset my Greenstar 8000?

You reset your Greenstar 8000 by holding down the “reset” button. The reset button location and the duration for which you depress it differs depending on whether you’ve got the Life or the Style boiler. Below are the reset instructions for both models.

How to reset a Greenstar 8000 Life boiler?

Follow the two steps below to reset your Greenstar 8000 Life boiler.

  1. Press the “Up” and “Down” arrow buttons. Depress the “Up and “Down” arrow buttons simultaneously and hold the two buttons down for 6 seconds.
  2. Release the “Up” and “Down” buttons. Allow the boiler to restart after you’ve released the buttons.

How to reset a Greenstar 8000 Style boiler?

Reset a Greenstar 8000 Style boiler by following the two steps below.

  1. Find the “Reset” option. Scroll up or down using the corresponding arrow buttons on the display (once the screen has shown you a fault) until you find the “Reset” option.
  2. Click the “OK” button. Click the “OK” button once you see “Reset” on your screens and allow the boiler to restart itself.

How do I top up my Worcester 8000?

You have two options to top up your Worcester 8000. First, you have the option of letting the Intelligent Filling System do its job and top up the system automatically. Second, you’re able to top up your Worcester 8000 manually by following the four steps below.

  1. Unscrew the blanking cap and attach the hose to the valve. The hose should be screwed on tightly so that it cannot be tightened by hand.
  2. Open the valve. Turn the pressure handle from the closed position (at the level of the valve) 90 degrees to the open position.
  3. Fill the system. Fill the system until you reach a target pressure of 1 – 1.5 bar.
  4. Close the valve. Return the pressure handle to the closed position.

Note that your system likely has a leak if the boiler keeps losing pressure constantly. You should get a Gas Safe boiler engineer to inspect your boiler and heating system and repair any leaks before topping up the boiler.