Worcester Boiler Models, Features, Prices, and Alternatives (2024 Update)

A Worcester boiler is one of the most coveted heating appliances on the UK market. A Worcester boiler is a worthy investment if you don’t mind paying a premium in return for proven reliability, high energy efficiency, and a range of user-friendly, convenient features. Boilers from Worcester Bosch come as combination, system, and regular boilers in a wide assortment of sizes and use the most common fuel types.

Worcester’s Greenstar boiler lineup includes premium, high-capacity boilers meant for large detached homes, such as the Greenstar 8000, as well as boilers for the smallest apartments, like the Greenstar CDi Compact combi. Worcester have an impressive selection of oil boilers to serve customers who do not have a gas connection, and most of their gas boilers are convertible to LPG. Below is a list of the 12 boilers in the Worcester Bosch Greenstar line-up.

• Greenstar 2000
• Greenstar 4000
• Greenstar 8000 Life and Style
• Greenstar CDi Compact
• Greenstar CDi Highflow
• Greenstar CDi FS
• Greenstar Si Compact
• Greenstar i
• Greenstar Ri
• Greenstar Heatslave II
• Greenstar Danesmoor External
• Greenstar Danesmoor Utility

Boilers manufactured by Worcester Bosch cost between £1,200 and £3,500, with higher-capacity oil boilers costing more and smaller gas boilers having the lowest price tag. This price range excludes installation, which typically adds another £1,000 to the total costs. Worcester’s prices are on the higher end of the scale in the UK, but they’re not the highest.

Bosch build durable boilers and offer one of the heating industry’s longest and most comprehensive guarantees to back up the quality of their product. Annual boiler service is a condition for keeping the guarantee valid throughout its term. Servicing a Worcester boiler is likewise an effective way to keep common boiler problems, such as low or high pressure, leaks, ignition lockouts, lack of hot water, and other component failures from occurring.

The typical boiler from Worcester is designed to integrate with the latest smart home technology. The company’s EasyControl system and app allow you to operate most of the company’s boiler models from your smartphone or an intelligent room thermostat. That said, Worcester boilers are compatible with Bosch’s wireless digital programmers and even mechanical timers if you prefer simple controls.

A Worcester boiler is a worthwhile investment if you’re looking to get value for your money. Boilers produced by Worcester are not cheap, but they’re reliable, powerful, efficient, user-friendly, and come with generous, all-encompassing guarantees. Their only two drawbacks are the relatively high price point and the fact that Worcester heat exchangers are made from aluminium, which is arguably less durable than stainless steel.

Alternatives to Worcester boilers include models from Viessmann and Baxi, which have similar quality construction, lengthy warranties, and high-to-midrange prices.

Below is our review of the Worcester Bosch brand, which takes you through all of the manufacturer’s boiler models, their prices, warranties, control options, and common faults.

What is the Worcester Greenstar boiler range?

The Worcester Greenstar boiler range is a series of boilers that includes all models manufactured by Worcester Bosch. Worcester’s Greenstar range comprises boilers of different types, sizes, and fuel compatibilities, and is considered to be the leading range among the UK’s top boiler brands. The table below summarises Worcester Greenstar boiler types, models, heating capacities, and fuel types.

Worcester Greenstar boiler range
Boiler Type	Worcester Models	Heating Capacity	Fuel Type*
Combi	Greenstar 2000	25kW, 30kW	Natural Gas, LPG
Combi	Greenstar 4000	25kW, 30kW	Natural Gas, LPG
Combi	Greenstar CDi Compact	24kW	Natural Gas, LPG
Combi	Greenstar CDi Highflow	30kW	Natural Gas, LPG
Combi	Greenstar Si Compact	24kW	Natural Gas, LPG
Combi	Greenstar Heatslave II	18kW	Oil
Combi, System	Greenstar 8000 Style	30kW, 35kW, 40kW, 45kW, 50kW	Natural Gas, LPG
Combi, System	Greenstar 8000 Life	35kW, 40kW, 45kW	Natural Gas, LPG
System	Greenstar i	27kW, 30kW	Natural Gas, LPG
System, Regular	Greenstar Danesmoor External	18kW, 25kW, 32kW	Oil
System, Regular	Greenstar Danesmoor Utility	18kW, 25kW, 32kW	Oil
Regular	Greenstar CDi FS	30kW, 42kW	Natural Gas, LPG
Regular	Greenstar Ri	12kW, 15kW, 18kW, 21 kW, 24kW,	Natural Gas, LPG
*Worcester gas boiler models are capable of running on Liquefied Petroleum Gas (LPG) as long as you purchase the LPG conversion kit.

Below is a more comprehensive guide to Worcester Bosch Greenstar combi, system, and regular boiler models.

What are the Worcester Bosch combi boiler models?

The seven Worcester combi boiler models are as follows.

• Greenstar 2000
• Greenstar 4000
• Greenstar 8000 Life
• Greenstar 8000 Style
• Greenstar CDi Compact and Highflow
• Greenstar Si Compact
• Greenstar Heatslave II

Worcester combination boilers heat water directly from the cold mains, whilst alternating their operation between domestic hot water and central heating. Combi boilers (short for “combination boilers) are the most popular in the UK due to their compact footprint and ability to heat water on demand.

Below is an in-depth look at the features and specifications of Worcester combi boiler models.

Worcester Bosch Greenstar 2000 combi

The Worcester Bosch Greenstar 2000 is an entry-level, budget boiler that’s suitable for smaller properties and homes with modest hot water consumption. The specifications and features of the Worcester Bosch Greenstar 2000 combi boiler are listed below.

• Dimensions (mm): 400 x 724 x 300
• Fuel type: Natural Gas, LPG
• Hot water output: 25kW – 30kW
• Central heating output: 4.8kW – 20kW
• Flow rate: 10 l/min, 12 l/min.
• Efficiency rating: A/93% Erp seasonal space heating efficiency
• Key features: The Greenstar 2000 combi comes with a C6 heat exchanger that can modulate down to 4.8kW, a 6-year guarantee, and the Greenstar system filter.
• Suitable for: A small property with two bedrooms, ten or fewer radiators, and one bathroom
• Boiler-only price range: £1,200 – £1,600
• Fitted cost range: £1,700 – £2,900
• Standard warranty length: 6 years

Worcester Bosch Greenstar 4000 combi

The Greenstar 4000 is an advanced, mid-range boiler that delivers efficiency without breaking the bank. The specifications and features of the Worcester Bosch Greenstar 4000 combi are listed below.

• Dimensions (mm): 724 x 400 x 310
• Fuel type: Natural Gas, 20% hydrogen blend, LPG available
• Hot water output: 25kW – 30kW
• Central heating output: 24kW
• Flow rate: 9 l/min, 10.8 l/min.
• Efficiency rating: A, 94% Erp Seasonal Space Heating Efficiency
• Key features: The Greenstar 4000 combi boiler has a “Quick Tap” feature to save on energy, a full-colour display, and Bosch EasyControl to integrate with smart devices.
• Suitable for: A small to a medium-sized property with 1-3 bedrooms, 1-2 bathrooms, and 10-15 radiators.
• Boiler-only price range: £1,400 – £1,600
• Fitted cost range: £2,600 – £2,900
• Standard warranty length: 10 years

Worcester Bosch Greenstar 8000 Life combi

The Greenstar 8000 Life is the most advanced gas boiler from Worcester Bosch. The boiler comes at a premium price and offers the latest technological innovations that streamline ease of use and boost energy efficiency. The specifications and features of the Worcester Bosch Greenstar 8000 combi are listed below.

• Dimensions (mm): 780 x 440 x 365
• Fuel type: Natural Gas, 20% hydrogen blend, LPG available
• Hot water output: 40kW – 50kW
• Central heating output: 30-kW-35kW
• Flow Rate: 14.3 l/min, 16.1 l/min, and 17.9 l/min for the 40kW, 45kW, and 50kW units respectively.
• Efficiency rating: A, 94% Erp Seasonal Space Heating Efficiency
• Key features: The Greenstar 8000 Life comes with Worcester’s longest-ever guarantee, wireless controls via the EasyControl System, an intelligent filling system, and a full LCD display.
• Suitable for: The Worcester Greenstar 8000 Life is suitable for large properties with 5 bedrooms, 2 bathrooms, and 15-20 radiators.
• Boiler-only price range: £1,700 – £2,700
• Fitted cost range: £3,500 – 4,000
• Standard warranty length: 12 years

Worcester Bosch Greenstar 8000 Style combi

The Greenstar 8000 Style has all of the 8000 Life’s advanced features, but with a sleek, black glossy finish and additional options on the control panel.  The specifications and features of the Worcester Bosch Greenstar 8000 Style combi are listed below.

• Dimensions (mm): 780 x 440 x 365
• Fuel type: Natural Gas, LPG
• Hot water output: 30kW – 50kW
• Central heating output: 35kW
• Flow rate: 10.7 l/min, 12.5 l/min, 14.3 l/min, 16.1 l/min, and 17.9 l/min.
• Efficiency rating: A, 94% Erp Seasonal Space Heating Efficiency
• Key features: The Greenstar 8000 Style comes with the same features as the 8000 Life but adds a colour option and more advanced control options.
• Suitable for: The smaller output 30kW, 35kW, and 40kW models are suitable for medium-sized properties with 2-3 bedrooms, 2 bathrooms, and 15 radiators. The larger 45kW and 50kW models are suitable for larger properties with 4-5 bedrooms, 2 bathrooms, and 15-20 radiators.
• Boiler-only price range: £1,500 – £2,800
• Fitted cost range: £2,300 – £3,600
• Standard warranty length: 12 years

Worcester Bosch Greenstar CDi Compact combi

The Greenstar CDi compact is a combi that’s small enough to be tucked away inside a kitchen cupboard. The model comes in three sizes: the 28CDi Compact, the 32CDi Compact, and the 36CDi Compact. The specifications and features of the Worcester Bosch Greenstar CDi Compact combi are listed below.

• Dimensions (mm): 690 x 390 x 280
• Fuel type: Natural Gas, LPG
• Hot water output: 28kW – 36kW
• Central heating output: The Greenstar CDi Compact has a central heating output of 24kW.
• Flow rate: 11.5l/min, 12.9 l/min
• Efficiency rating: A, 94% ErP Seasonal Space Heating Energy Efficiency
• Key features: The Greenstar CDi Compact combi boiler features a wide range of controls to increase fuel economy, frost protection, and a low-energy pump that saves you money on your energy bills.
• Suitable for: The Worcester Greenstar CDi Compact combi boiler is suitable for a medium-sized property with 10-15 radiators, 2 bathrooms, and 2-4 bedrooms.
• Boiler-only price range: £1,100 – £1,500
• Fitted cost range: £1,800 – £2,300
• Standard warranty length: 10 years

Worcester Bosch Greenstar CDi Highflow combi

The Greenstar CDi Highflow offers some of Worcester Bosch’s most impressive flow rates, which allow the model to accommodate households with high water consumption. The specifications and features of the Worcester Bosch Greenstar CDi Highflow combi are listed below.

• Dimensions (mm): 850 x 600 x 600
• Fuel type: Natural Gas, LPG
• Hot water output: 30 – 31kW
• Central heating output: 29.2kW – 30.6kW
• Flow rate: 20 l/min, 25 l/min
• Efficiency rating: A, 92% ErP Seasonal Space Heating Efficiency
• Key features: The Greenstar CDi Highflow features industry-leading flow rates, frost protection, and a 90-litre draw-off to ensure high hot water flow rates.
• Suitable for: The Greenstar CDi Highflow is suitable for a medium-sized property with 2 bathrooms, 10-15 radiators, and 2-4 bedrooms
• Boiler-only price range: £2,500 – £3,000
• Fitted cost range: £3,500 – £4,000
• Standard warranty length: 10 years

Worcester Bosch Greenstar Si Compact combi

The Greenstar Si Compact combi is designed for smaller apartments and owners with modest hot water needs. The specifications and features of the Worcester Bosch Greenstar Si Compact combi are listed below.

• Dimensions (mm): 690 x 390 x 280
• Fuel type: Natural Gas, LPG
• Hot water output: 25kW – 30kW
• Central heating output: 24kW
• Flow rate: 8.9 l/min, 10.7 l/min
• Efficiency rating: A
• Key features: The Greenstar Si Compact features frost protection, simple boiler control knobs, and a low-energy pump to save you money on fuel.
• Suitable for: The Greenstar Si Compact is suitable for a smaller property with one bathroom, 10 radiators, and 2 bedrooms.
• Boiler-only price range: £1,200 – £1,400
  Installation cost range: £2,800 – £3,400
• Standard warranty length: 10 years

Worcester Bosch Greenstar Heatslave II oil combi boiler

The Greenstar Heatslave II is Worcester’s only oil combi boiler and is thus a suitable choice for households that are off the gas grid. The specifications and features of the Worcester Bosch Greenstar Heatslave II combi are listed below.

• Dimensions (mm): 855 x 520 x 600
• Fuel type: Oil
• Hot water output: 18 – 32 kW
• Central heating output: The Greenstar Heatslave II has a central heating output of 12kW.
• Flow rate: 15l/min
• Efficiency rating: A, 90% ErP seasonal space heating efficiency
• Key features: The Greenstar Heatslave II comes with Eco hot water mode, precise heating and water controls, and EasyControl smartphone integration.
• Suitable for: The Heatslave II is suitable for small and medium properties with 1-2 bathrooms, 10-15 radiators, and 2-3 bedrooms.
• Boiler-only price range: £3,000 – £3,300
• Fitted cost range: £3,700 – £4,300
• Standard warranty length: 7 years

What are the Worcester Bosch system boiler models?

The five Worcester system boiler models are as follows.

• Greenstar 8000 Style
• Greenstar 8000 Life
• Greenstar i
• Greenstar Danesmoor Utility
• Greenstar Danesmoor External

Worcester system boilers heat and store domestic water in a hot water cylinder, while separately circulating water through the central heating system. System boilers are suitable for larger households that consume lots of hot water simultaneously. Below is a detailed overview of Worcester’s five system boiler models.

Worcester Bosch Greenstar 8000 Style system boiler

The Greenstar 8000 Style system boiler is a high-end appliance with premium features and impressive performance that’s designed specifically for mid-sized and large family homes. The specifications and features of the Worcester Bosch Greenstar 8000 Style system boiler are listed below.

• Dimensions (mm): 780 x 365 x 440
• Fuel type: Natural Gas, LPG
• Central heating output: 30kW – 35kW
• Efficiency rating: A, 94% ErP Seasonal Space Heating Efficiency
• Key features: The Greenstar 8000 Style comes with a sleek black finish, advanced controls with smartphone integration, and is one of Worcester’s quietest boilers.
• Suitable for: The Greenstar 8000 Style is suitable for large properties with 2+ bathrooms, 4 bedrooms, and 15 radiators.
• Boiler-only price range: £2,000 – £2,400
• Fitted cost range: £3,500 – £3,700
• Standard warranty length: 12 years (when installed by an accredited installer)

Worcester Bosch Greenstar 8000 Life system boiler

The Greenstar 8000 Life system boiler performs to a high standard in terms of both energy efficiency and output. The specifications and features of the Worcester Bosch Greenstar 8000 Life system boiler are as follows.

• Dimensions (mm): 780 x 365 x 440
• Fuel type: Natural Gas, LPG
• Central heating output: 35kW
• Efficiency rating: A, 94% ErP Seasonal Space Heating Efficiency
• Key features: The Greenstar 8000 Style comes with intelligent filling and advanced controls with smartphone integration and is one of Worcester’s quietest boilers.
• Suitable for: The Greenstar 8000 Style is suitable for large properties with 2+ bathrooms, 4 bedrooms, and 15 radiators.
• Boiler-only price range: £1,600 – £2,000
• Fitted cost range: £3,800 – £4,200
• Standard warranty length: 12 years (when installed by an accredited installer)

Worcester Bosch Greenstar i system boiler (Obsolete as of 2020)

The Greenstar i is now obsolete, but was once the most popular Worcester system boiler choice for small properties and those on a budget. The Worcester Bosch Greenstar i system boiler comes in several sizes, including the Greenstar 24i, Greenstar 25i, and Greenstar 30i. The specifications and features of the Worcester Bosch Greenstar i are listed below.

• Dimensions (mm): 690 x 390 x 280
• Fuel type: Natural Gas, LPG
• Central heating output: 9kW – 30kW
• Efficiency rating: A, 94% ErP Seasonal Space Heating Efficiency.
• Key features: The Greenstar i system boiler features user-friendly displays, a low-energy pump, Greenskies solar panel compatibility, and simple control knobs.
• Suitable for: Suitable to medium-sized properties with 10-15 radiators, 2-3 bedrooms, and 1-2 bathrooms.
• Boiler-only price range: £1,400 – £1,500
• Fitted cost range: £2,400 – £2,500
• Standard warranty length: 10 years

Worcester Bosch Greenstar Danesmoor External oil system boiler

The Worcester Bosch Danesmoor External is a freestanding, oil-fired system boiler meant to be installed outdoors. The specifications and features of the Danesmoor External system boiler are listed below.

• Dimensions (mm): 950 x 565 x 780
• Fuel type: Oil
• Central heating output: 18kW – 32kW
• Efficiency rating: A, 90% Seasonal Space Heating Efficiency
• Key features: Frost protection, green cabinet to blend in with your garden, compatible with Greenskies solar panel, compatible with Greenstore cylinders.
• Suitable for: Suitable for a medium-sized property with 10-15 radiators, 1 bathroom, and 2 bedrooms
• Boiler-only price range: £3,000 – £3,400
  
• Fitted cost range: £3,600 – £4,500
• Standard warranty length: 7 years

Worcester Bosch Greenstar Danesmoor Utility oil system boiler

The Greenstar Danesmoor Utility is a durable oil system boiler with plenty of functionality to keep your heating and hot water infrastructure running smoothly in an off-grid setting. The specifications and features of the Worcester Bosch Danesmoor Utility oil boiler are listed below.

• Dimensions (mm): 855 x 370 x 600
• Fuel type: Oil
• Central heating output: 18kW – 32kW
• Efficiency rating: A, 91% Seasonal Space Heating Efficiency.
• Key features: Concealed boiler controls, compatible with Greenstore cylinders, compatible with Greenskies solar panels.
• Suitable for: Suits a range of properties, including medium-sized properties with 10-15 radiators, 1 bathroom, and 2 bedrooms.
• Boiler-only price range: £2,000 – £2,900
  
• Fitted cost range: £3,000 – £4,000
• Standard warranty length: 7 years.

What are the Worcester Bosch heat-only boiler models?

The five Worcester Bosch heat-only boiler models are as follows.

• Greenstar 8000 Life
• Greenstar CDi FS
• Greenstar R
• Worcester Bosch Greenstar Danesmoor External oil boiler
• Worcester Bosch Greenstar Danesmoor Utility oil boiler

A Worcester heat-only boiler stores water in a special cylinder, just like its system counterpart. The difference between Worcester’s regular boilers and their system boilers is that Worcester’s regular boilers have separate cold water tanks. These cold water tanks and an expansion vessel help to maintain pressure in your central heating system. The cold tanks are typically installed in the attic so that gravity helps maintain the pressure in your taps. Heat-only boilers from Worcester (and other brands) are suitable for large homes that are already equipped with water storage facilities.

We offer a thorough overview of each of the five Worcester heat-only boiler models below.

Worcester Bosch Greenstar 8000 Life regular boiler

The Greenstar 8000 Life Regular is Bosch’s highest-capacity regular boiler. The Greenstar 8000 has all the modern functionality of a boiler in its price range and performs well in terms of output and energy efficiency. The specifications and features of the Worcester Bosch Greenstar 8000 Life regular boiler are listed below.

• Dimensions (mm): 780 x 440 x 365
• Fuel type: Natural Gas, LPG
• Central heating output: 35kW – 50kW
• Efficiency rating: A, 94% ErP Seasonal Space Heating Efficiency
• Key features: The Greenstar 8000 Life regular comes with Worcester’s longest-ever guarantee, wireless connections to your thermostat and smartphone, and an intuitive LCD display.
• Suitable for: The Greenstar 8000 Life is suitable for different properties depending on your selected output size
• Boiler-only price range: £1,700 – £2,700
  
• Fitted cost range: £3,400 – £4,100
• Standard warranty length: 12 years

Worcester Bosch Greenstar CDi FS regular boiler

The Greenstar CDi FS is a discrete boiler designed to fit perfectly in a kitchen cabinet while also supporting the hot water needs of larger properties. The specifications and features of the Worcester Bosch Greenstar CDi FS regular boiler are listed below.

• Dimensions (mm): 850 x 400 x 600
• Fuel type: Natural Gas, LPG
• Hot water output: 30kW – 42kW
• Central heating output: 30kW – 41kW
• Efficiency rating: A, 92% ErP Seasonal Space Heating Efficiency.
• Key features: The Greenstar CDi FS regular boiler fits under a standard kitchen counter, features simple control knobs, and is compatible with Greenskies solar panels.
• Suitable for: The Greenstar CDi FS is suitable for larger properties of between 20+ radiators, 4+ bedrooms, and 2+ bathrooms.
• Boiler-only price range: £1,900 – £2,500
• Fitted cost range: £2,400 – £3,400
• Standard warranty length: 10 years

Worcester Bosch Greenstar Ri regular boiler

The Greenstar Ri is a heat-only boiler suited to small and medium-sized properties. The specifications and features of the Worcester Bosch Greenstar Ri regular boiler are listed below.

• Dimensions (mm): 600 x 390 x 270
• Fuel Type: Natural Gas, LPG
• Central Heating Output: 12kW – 24kW
• Efficiency Rating: A, 92% ErP Seasonal Space Heating Efficiency.
• Key Features: The Greenstar Ri comes with frost protection and Greenskies solar panel compatibility, and it fits under the kitchen counter.
• Suitable for: The suitable property sizes for the Greenstar Ri will depend on your selected size. The line has models suited to properties with 6 radiators, 1 bathroom, and 1 bedroom and 15 radiators, 2 bathrooms, and 2+ bedrooms.
• Boiler-only price range: £1,000 – £1,200
• Fitted Cost Range: £3,400 – £3,800
• Standard Warranty Length: 10 years.

Worcester Bosch Greenstar Danesmoor oil boiler

The Greenstar Danesmoor is an oil-fired regular boiler that works well for homeowners without mains gas but with plenty of space for cold water storage. The specifications and features of the Worcester Bosch Greenstar Danesmoor are listed below.

• Dimensions (mm): 855 x 370 x 600
• Fuel type: Oil
• Central heating output: 18kW – 32kW
• Efficiency rating: A, 90% ErP Seasonal Space Heating Efficiency.
• Key features: The Greenstar Danesmoor is compatible with Greenskies solar panels, Greenstore hot water cylinders, and comes with an optional 7-day programmer.
• Suitable for: The Greenstar Danesmoor has model sizes suitable for all properties.
• Boiler-only price range: £2,100 – £2,700
• Fitted cost range: £2,700 – £3,900
• Standard warranty length: 7 years

Worcester Bosch Greenstar Danesmoor External oil boiler

The Greenstar Danesmoor external is a regular oil boiler designed to operate in an outdoor space. The specifications and features of the Worcester Bosch Greenstar Danesmoor External oil boiler are listed below.

• Dimensions (mm): 950 x 565 x 780
• Fuel type: Oil
• Central heating output: 18kW – 32kW
• Efficiency rating: A, 90% ErP Seasonal Space Heating Efficiency
• Key features: The Greenstar Danesmoor is compatible with Greenskies solar panels, and Greenstor hot water cylinders and features a green exterior that blends into your garden.
• Suitable for: The Greenstar Danesmoor has model sizes suitable for all properties.
• Boiler-only price range: £2,400 – £3,000
• Fitted cost range: £2,300 – £4,500
• Standard warranty length: 7 years

Worcester Bosch Greenstar Danesmoor Utility oil boiler

The Greenstar Danesmoor Utility is a regular oil boiler that comes in a range of heating capacities to fit various property sizes. The specifications and features of the Worcester Bosch Greenstar Danesmoor Utility are listed below.

• Dimensions (mm): 855 x 370 x 600
• Fuel type: Oil
• Central heating output: 18kW – 32kW
• Efficiency rating: A, 90% ErP Seasonal Space Heating Efficiency.
• Key features: The Greenstar Danesmoor is compatible with Greenskies solar panels, and Greenstore hot water cylinders and features concealed boiler controls.
• Suitable for: The Greenstar Danesmoor comes with model sizes suitable for all properties.
• Boiler-only price range: £2,100 – £2,800
• Fitted cost range: £2,800 – £4,000
• Standard warranty length: 7 years.

If you’re not sure which Worcester boiler model is most suitable for your home, try using Heatable’s online boiler calculator. The calculator processes your property parameters (all the info you supply remains anonymous) and returns a range of suitable boilers from Worcester and other leading brands.

How are the Worcester Bosch boiler prices?

Worcester Bosch boiler prices are on the higher end of the range, but Worcester boilers are not the most expensive in the UK. Worcester boiler prices sit in the middle between their costlier Vaillant and less expensive Viessmann counterparts. However, the price of  Worcester Bosch boilers differs quite a bit depending on the model, fuel, and boiler type. Below is a summary of typical boiler-only price ranges for Worcester combi, system, and heat-only boilers as of 2024.

• Worcester combi boiler prices: Worcester gas combi boilers range between £1,200 and £3,000, whilst the oil combis typically start around £3,300.
• Worcester system boiler prices: Worcester’s system boilers cost £1,400-£2,400 if gas-fired, whilst their oil counterparts start at £3,000. Note that buying a system boiler (regardless of fuel) entails purchasing a separate hot water tank, which may add as much as £1500 to the purchase costs (before installation).
• Worcester heat-only boiler prices: Heat-only gas boilers from Worcester Bosch range in price between £1,000 and  £2,500. Meanwhile, oil-fired heat-only models cost £2,400 – £3,000 on average.

Note that the prices indicated above are only estimates, and may change frequently due to the volatility of the market and the ongoing economic uncertainty. Likewise, bear in mind that the aforementioned price ranges include the appliance only and exclude the installation.

Worcester boiler prices fitted

Worcester boiler prices go up by about £1,000 on average if they include fitting. However, the exact costs to install a Worcester boiler depend on the six broad factors below.

• Worcester boiler type: Combi boilers generally cost less to fit than regular or system boilers, since they do not require hot and cold water storage tanks.
• Boiler location: Installing a Worcester in the same location as your old boiler costs less than fitting the replacement in a new spot.
• Installer: National heating companies generally charge more for boiler installation than local trades or online boiler fitters.
• Where you live: Boiler installation generally costs the most in the capital region, whereas the North is typically the least expensive.
• Site-specific circumstances: Your boiler’s location in the house, ease of access to the boiler, flue configuration, and other factors all influence the boiler fitting costs.
• Extras: Opting for extras, such as third-party controls, extended warranties, or a system cleanse increases the overall price of getting a new Worcester boiler.

You’re able to get a firm idea of how much your preferred Worcester costs (fitted) by filling in an anonymous questionnaire from Heatable. Heatable’s online boiler calculator accounts for all the cost factors listed above, so you actually get a fixed-price quote for a new Worcester, including installation and financing options.

How long is the Worcester boiler warranty?

The Worcester boiler warranty ranges between 5 and 12 years, depending on the model. These warranty durations entail getting your new boiler installed by a Worcester-accredited installer or Heatable, who are able to offer 10-12-year warranty terms on their Worcester installations.

Note that a Worcester Bosch warranty differs substantially from warranties that other boiler makers offer with their products. In fact, a Worcester warranty is not a “warranty” per se, at least not according to the manufacturer themselves. What Worcester offer their buyers is a guarantee: a legal document that entails a higher degree of care from the manufacturer than a standard boiler warranty typically does.

Worcester guarantee vs warranty

The difference between a Worcester guarantee and a warranty is threefold. Firstly, Worcester’s guarantee does not incur an additional charge at the time of purchase, whilst most boiler warranties come at an added cost (especially those that are longer than 1-2 years). Secondly, the Worcester Bosch guarantee protects the entire boiler and all of its components in the event of a malfunction. In contrast, a standard boiler warranty may exclude parts the manufacturer knows to be unreliable. The final difference between Worcester’s guarantee and a regular warranty is that the latter often comes with a callout charge, whilst the former does not. Worcester guarantees not to charge for callouts when a covered boiler stops working properly.

Worcester warranty checker

The Worcester warranty checker is an online tool from Worcester Bosch that allows you to check the remaining length of your boiler’s warranty. Simply input your boiler’s serial number and the tool will show you the remaining warranty duration. You’re able to access the Worcester guarantee checker here.

Is Worcester boiler service worth it?

Worcester boiler service is worth it for two reasons. Firstly, boiler service is mandatory for maintaining the validity of the Worcester guarantee. You must get your boiler serviced annually if you want the guarantee to remain in effect. Secondly, having your boiler inspected annually by Worcester Bosch-approved service engineers gives you a chance to catch component failures in their early stages. Lack of regular service allows faulty parts to deteriorate to a point where you need extensive repairs or a full boiler replacement.

How long should a Worcester boiler last?

A Worcester boiler should last around 15 years. However, how long the boiler lasts without needing significant repairs varies depending on which model you choose. A boiler’s warranty length is a good indicator of how long your boiler is likely to function well without needing fixes. The Greenstar 4000 and 8000 combi boilers have 12-year warranties and are likely to last long without repairs by that standard. Meanwhile, the Danesmoor Utility system boiler has a 7-year warranty, indicating it might need some repairs sooner than a Greenstar 8000.

The way you take care of your Worcester boiler has significant implications for the boiler’s lifespan. Your Worcester boiler should last over a decade or longer if you service it regularly, as frequent service finds faults before they deteriorate. Likewise, fitting your Worcester with a system filter prevents sludge accumulation, blockage, and the resulting damage to parts. Maintaining your boiler properly is an effective way of prolonging its service life and preventing common boiler problems.

What are the common Worcester boilers’ problems?

Problems common among Worcester boilers are similar to the issues other boiler brands experience. Worcester boilers’ main issues largely stem from stress-related wear-and-tear, debris buildup, and failure of safety mechanisms. Despite the possibility of such problems occurring, Worcester boilers are generally reliable with proper maintenance and annual service.

Below is a list of the nine most common Worcester boiler problems.

• Pressure problems: Worcester boiler pressure problems stem from root causes such as leaks in the central heating system, overheating, and malfunctioning pressure gauges. The vast majority of pressure problems may be resolved by adjusting water levels and fixing leaks in the system.
• No hot water: A Worcester that’s producing no hot water likely has an issue with its diverter valve. Alternatively, the problem may arise due to any failed component that allows the boiler to operate safely. Such a failure would result in a boiler lockout and the subsequent loss of hot water and heating.
• Boiler leaking water: A Worcester boiler that’s leaking water underneath likely has a crack in one of its internal components or a blown seal. A Gas Safe engineer is able to identify the source of the leak and recommend a suitable fix.
• Boiler making noise: A noisy Worcester boiler likely suffers from debris buildup, an airlock, or a loose component. You need a Gas Safe engineer to diagnose and troubleshoot this fault.
• Not responding to the thermostat: A Worcester boiler that’s not responding to thermostat commands could be simply off. Otherwise, it’s an issue with the thermostat, which you may be able to troubleshoot yourself using the manufacturer’s instructions.
• Boiler overheating: An overheating Worcester boiler likely has a faulty internal component that’s preventing the pressure from being relieved properly. You need a Gas Safe engineer to examine this fault and recommend a fix.
• Frozen condensate pipe: Modern Worcester Bosch boilers are equipped with a feature that prevents the freezing of condensate pipes. However, you’re able to thaw the pipe if it freezes by pouring warm water over it right where it exits the exterior wall (on the outside face).
• Pilot light not coming on: A Worcester’s pilot light may not be coming on because of a malfunctioning thermocouple, carbon deposits, or a gas supply issue. Each of these root causes requires resolution by a Gas Safe engineer.
• Ignition locks out on boiler: Worcester boiler lockout stems from the failure of a critical safety mechanism, such as a pressure relief valve. Only a Gas Safe-registered engineer is able to safely analyse and resolve this problem.

Worcester boiler faults that stem from broken internal components or issues with the gas supply require professional diagnostics and fixing from a Gas Safe engineer. However, you may be able to troubleshoot some of the simpler issues (such as a frozen condensate pipe) on your own. The Worcester boiler fault codes that appear on the display when a problem occurs give you an indication of what the malfunction is, and whether you’re able to fix it on your own.

How to reset a Worcester boiler?

To reset a Worcester boiler all you need to do is press and hold the reset button for several seconds, or until the fault code on the display has cleared. The Worcester boiler reset button is usually right on the display screen, although some models require you to turn the temperature knob to the “reset” position instead and hold it there for a few seconds. You’re able to find the exact reset procedure for your Worcester model in the boiler instructions you received at the time of installation. The manufacturer’s user manual provides an overview of the boiler’s controls, including the reset procedure.

How are the Worcester Bosch boiler controls?

Worcester Bosch boiler controls are wide-ranging in their type and functionality. You’re able to choose how you control your Worcester boiler depending on your preference and lifestyle. Below are the standard control options available to anyone fitting a boiler manufactured by Worcester Bosch.

• Bosch EasyControl Smart Thermostat: The EasyControl smart thermostat presents the easiest option for controlling your Worcester boiler, which you’re able to do from anywhere via the EasyControl smartphone app, or by changing settings on a wall-mounted thermostat.
• Bosch Smart Individual Room Thermostat: The individual room smart thermostat from Bosch gives you heating control over specific zones in your home. The individual room thermostat works in unison with the Bosch EasyControl Smart Thermostat and smartphone app.
• Third-party thermostats: Honeywell, Nest, and tado° smart thermostats are compatible with most Worcester Bosch boilers. However, Hive does not work with some Worcester combis, so it’s best to check if your desired Worcester model is compatible with Hive if that’s the thermostat you plan to use.
• Greenstar Comfort II: The Greenstar Comfort II integrates the room thermostat and the boiler programmer. This control option allows you to input indoor temperature commands and change boiler settings from the room thermostat, without having to use the boiler’s integral control panel.
• Greenstar Comfort digital programmer: This digital programmer plugs directly into the boiler and allows you to program central heating and domestic hot water settings.
• Greenstar Comfort I: The Comfort I comprises two units: the room thermostat and a programmer that plugs into the boiler. The two devices communicate wirelessly, allowing you to adjust both indoor climate commands and boiler settings.
• Greenstar Comfort + II RF: The Comfort+II RF combines a room thermostat with an RF key that plugs into the boiler. The two devices communicate wirelessly and enable to you control the indoor temperature, as well as the boiler’s central heating and hot water output temperatures from the room thermostat.
• Mechanical controls: Worcester Bosch offer basic mechanical, wireless controllers that give you the ability to set daytime and nighttime temperatures and program the boiler to turn on and off at specific times. These controls have a mechanical display, which is essentially a timer dial.
• Worcester Bosch boiler control panel: The control panel of any Worcester unit lets you set the water temperature, program the boiler to turn on and off, and reset the boiler.

What are Worcester boiler settings 1 to 6?

Worcester boiler settings 1 to 6 are the boiler’s flow water temperature settings. 1 is the lowest temperature level, which leads the boiler to produce water that’s lukewarm. 6 is the highest level, which gets your rads hot quickly but is highly inefficient. The optimal output temperature settings for condensing boilers like Worcesters is somewhere between 3 and 5, depending on the model (the user manual should specify which temperature settings are ideal). You may have two sets of temperature controls, depending on the boiler type. Worcester combis have separate temp controls for central heating and domestic hot water, whilst their system and regular counterparts have a single means of controlling the flow water heat.  You’re able to adjust the flow water temperature on the boiler’s control panel or using the Bosch room thermostat.

How to set a timer on a Worcester boiler?

How you set a timer on a Worcester boiler depends on what type of controls you’re using and the exact boiler model. Below are the three possible methods you have for setting the timer and manually turning on or off heating on a Worcester boiler.

• On a mechanical timer: A mechanical boiler timer has a dial with pins around it. You’re able to set the timer by turning the arrow on the dial to the current time, flipping the pins to the on or off position at the desired time, and activating the timer switch.
• On a digital programmer: Worcester’s Comfort programmers comprise a display screen with buttons and a knob on the console. Use the knob to select the Time programs menu, then enter the menu by clicking the knob. Rotate and press the knob to make time period and temperature selections.
• On a smart thermostat: A smart thermostat allows you to create a detailed heating programme days and weeks in advance. The programme gives you more control than simply setting the boiler to turn on or off. Using a smart thermostat, you’re able to select desired temperatures for specific times and days. The smart thermostat is then able to learn from your programme (and your tweaks to it) and replicate its heating pattern without your input.

Is a Worcester boiler worth it?

A Worcester boiler is worth it if you don’t mind paying more for a boiler with superior performance, durability, user-friendly controls, and a comprehensive guarantee. Worcester Bosch is one of the best boiler brands, and Worcester boilers are reliable, highly energy-efficient, user-friendly, and come packed with a wide assortment of handy features. That said, all the benefits of Worcester boilers come at a cost — these high-end boilers command a premium compared to equivalents from other brands.

What are the advantages of Worcester boilers?

The four key advantages of Worcester boilers are listed below.

• Industry-leading guarantees: Worcester Bosch offers some of the longest guarantees in the industry, reflecting the quality of their products. The newer models in the Greenstar lineup come with 12-year guarantees when installed by a Worcester-accredited installer. The guarantee gives you a legal right to have your boiler repaired, which is not the case with the warranties offered by other manufacturers.
• Wide selection for all home sizes and budgets: Worcester Bosch produces boilers suited to any size property. Small boilers like the CDi Compact work well in one or two-bedroom apartments, while the Greenstar 8000 can support the largest homes on the market.
• High energy efficiency Every boiler in the Worcester lineup has an A-grade efficiency rating. The company’s highly efficient boilers save you money by cutting down on electricity costs. Some of their boilers come with advanced energy-saving features, like Eco Mode and Weather Compensation.
• Technologically advanced features: Worcester’s boilers take advantage of the latest technological innovations. Their newer boilers feature advanced LCD displays with well-designed interfaces that make operating your boiler easy. The newest Greenstar models even connect to your phone and smart speaker for full smart home integration.

What are the disadvantages of Worcester boilers?

The two main disadvantages of Worcester boilers are listed below.

• Above-average costs: Worcester produces boilers that are expensive compared to those produced by their competitors. However, Worcester boilers are not the most expensive on the UK market.
• Aluminium heat exchangers: Worcester use aluminium heat exchangers in their combi boilers. Aluminium increases Worcester’s heat exchangers’ efficiency but also makes them more susceptible to corrosion and damage when compared to stainless steel alternatives.

Which is more reliable, Vaillant or Worcester Bosch?

Both Worcester Bosch and Vaillant boilers are reliable. Worcester Bosch boilers have longer and more comprehensive guarantees, which is typically an indicator of the company’s faith in their product. That said, Vaillant boiler warranties are extendable, and the boilers come fitted with superior, stainless steel heat exchangers. Meanwhile, their Worcester peers have aluminium heat exchangers, which are generally more vulnerable to corrosion.

Which Worcester boiler should I get for my home?

Which Worcester boiler you should get for your home depends on your property and hot water and heating needs. Consider the five factors below when deciding which Worcester Bosch model is most suitable for your home.

• Boiler type: A key factor in picking the right Worcester boiler for you is which boiler type suits your property and needs. A combi boiler is a good choice if you are unlikely to run multiple hot water taps at the same time. A system or regular boiler is a good fit for families with high hot water demand but is best suited for properties where you have enough space to accommodate the water storage tanks.
• Fuel type: You should consider which type of fuel you want to use. Most properties will have access to gas mains which most likely makes gas the best choice. Oil or LPG are good alternatives if you don’t have gas mains.
• Boiler size: Larger properties with more radiators and bathrooms need higher-capacity boilers to maintain water pressure and provide adequate heating.
• Hot water usage: You need a boiler that has a high enough output to provide for your particular usage. You may need a larger boiler if several of your home’s occupants are likely to use the shower simultaneously, for example.
• Budget: You need a boiler that suits your budget.

Below is a more thorough overview of the factors you must consider when selecting a Worcester Bosch boiler model.

Choose the right Worcester boiler type

Worcester boilers come in system, combi, and regular boiler types, and you must choose which of these boiler types is most suitable for your home. Below is a quick guide for choosing the right Worcester boiler type.

• Regular boiler: A regular boiler like the Worcester Greenstar CDi FS has both a hot water cylinder and a cold water tank. This boiler type is increasingly uncommon but can be a good fit if you already have a regular boiler installed or if you need a large amount of hot water readily available.
• Combi boiler: A combi boiler like the Worcester Greenstar 4000 combi differs from a regular boiler because it has no storage tank. Rather, it heats water directly from the mains as you need it. Combi boilers are a good choice if you want a cost-effective, energy-efficient system and rarely use large volumes of hot water.
• System boiler: System boilers like the Worcester Greenstar i system sit in the middle of regular and combi boilers. These boilers store hot water in a cylinder but do away with the cold water tanks that regular boilers require to operate. A system boiler is well suited to larger family homes where several people may need hot water simultaneously.

Try Heatable’s online boiler selection tool if you’re not sure which boiler type you need. Heatable’s tool considers factors such as your heating and hot water demand, property configuration, and existing heating infrastructure to recommend a boiler type that’s most suitable.

Choose the Worcester Bosch boiler fuel type

Worcester Bosch produce boilers that run on natural gas, LPG, and oil. Natural gas is the most common fuel option, as most UK households are connected to the gas grid. However, properties with no mains gas require a Worcester boiler that’s either powered by oil or LPG. The three fuel types are listed below, along with their advantages and disadvantages.

The three fuel options for Worcester boilers are listed below.

• Natural gas: Most Worcester boilers run on gas. The fuel is readily available if you have a gas connection in your home and is a relatively inexpensive fuel source.
• Liquid Petroleum Gas (LPG): LPG is an alternative to fueling boilers from the gas mains as it comes in a storage tank. LPG is a good option for people who live off the grid but don’t want an oil boiler.
• Oil: Oil is a common fuel source among older boiler models and households without a gas connection. The Worcester Greenstar Danesmoor line-up offers a selection of oil-fueled boilers if you fall into this category. Oil is a less environmentally friendly option when compared with both gas and hydrogen.

Choose the correct size for your Worcester boiler

Choosing the right size of Worcester boiler for your property is essential to ensure adequate heating and hot water for your needs. Below is a quick guide to boiler sizes.

• 24kW to 27kW Combi Boiler: A 24-27kW combi boiler is suitable for a property with 10 or fewer radiators, 1 bathroom, and 2 bedrooms.
• 28kW to 34kW Combi Boiler: A 28-34kW combi boiler is best for a property with 10-15 radiators, 2 bathrooms, and 2-4 bedrooms.
• 35kW+ Combi Boiler: A 35kW combi boiler is suitable for the largest properties with 15+ radiators, 2+ bathrooms, and 5+ bedrooms.
• 12kW to 20kW system or regular boiler: A 12-26kW system or regular boiler is suitable for a property with 12 or fewer radiators.
• 21kW to 26kW system or regular boiler: A 21-26kW system or regular boiler is suitable for a property with 12-15 radiators.
• 26kW to 33kW system or regular boiler: A 26-33kW system or regular boiler can support 15-20 radiators.

Select the Worcester boiler model with the right features

You should choose a Worcester boiler that gives you the features you need. The Greenstar 8000 and 4000 are good choices if you want advanced smart device integration. Similarly, the Greenstar Ri is a great option if you want solar compatibility.

Consider the Worcester boiler price

You should consider the price carefully when selecting your Worcester boiler. Worcester boilers generally have a higher price compared to the competition. The Greenstar 8000 Style is an excellent option if money is no object, whilst the Greenstar 2000 offers a more affordable alternative while still delivering the quality and features for which Worcester is well-known. Go to Heatable to get personalised quotes for Worcester boilers based on your location, property, and boiler type.

What are the alternatives to a Worcester boiler?

Below are the two alternatives you should consider if you’re not sure about getting a Worcester boiler.

• Baxi: Baxi are a quality boiler manufacturer that have been around for decades and have gained a stellar reputation in the UK. The Baxi boiler range is similar to Worcester’s, but with a lower price point, so they’re a fitting Worcester alternative if you’re on a budget.
• Viessmann: Viessmann are a German brand known for their boilers’ robust construction and extreme energy efficiency. Viessmann offer a range of combi, system, and heat-only boilers, as well as innovative solutions such as storage combis. The average price of a Viessmann boiler is slightly lower than that of a Worcester, so Viessmann is a less expensive Worcester alternative that makes no compromises on quality.