Worcester Bosch

Founded in 1962, Worcester Bosch is one of the most popular and most well-respected boiler manufacturers on the market. Its range of models includes gas and LPG compatible combi, regular and system boilers, as well as internal and external oil-fired combi, regular and system boilers.

Prices tend to be at the top end of the scale but for a premium price you get a premium boiler. Worcester Bosch boilers are known for their reliability and impressive build quality. They are also covered by parts and labour warranties of up to 12 years (depending on the model and whether it is installed by a Worcester Bosch accredited installer).

This level of quality is reflected in the number of awards Worcester Bosch has won over the years: its boilers are regular winners in the annual Which? awards, including winning the ‘Best Buy’ award several years in a row.

Worcester Bosch also holds a Royal Warrant for supplying boilers to Her Majesty The Queen’s Sandringham Estate.

Worcester Bosch combi boilers

Combi boilers connect directly to your mains water, providing both hot water and central heating. This removes the need to install a cold water storage tank and hot water cylinder, meaning you end up saving a lot of space inside your home.

Worcester Bosch offers a range of combi boilers to suit homes of different sizes and budgets. Smaller output sizes are more suited to homes with only 2-3 bedrooms and 1 bathroom, whereas the 35kW output models are ideal for houses with 4-5 bedrooms and more than 1 bathroom.

All of Worcester Bosch’s combi boilers are ErP A-rated for efficiency, which could save you a lot of money on your energy bills when compared to an older, more inefficient boiler. They are also compact and can be wall-mounted, meaning they can be fitted inside a kitchen cabinet or bedroom cupboard.

Worcester Bosch regular boilers

Regular boilers, also known as traditional boilers, are typically what you tend to find in older properties. Rather than connecting directly to the mains water supply, a regular boiler is supplied by a cold water storage tank that sits above the boiler (usually in the loft).

The water is heated and either stored in a hot water cylinder ready for when you run a shower or turn the tap, or used for central heating.

If you already have a regular boiler and need to replace it, the cheapest and easiest solution is usually to buy a new regular boiler. This is because you will already have a tank and cylinder installed, as well as the existing pipework.

Some regular boilers used to have a reputation for being inefficient but the modern range of regular boilers from Worcester Bosch are all ErP A-rated for efficiency and come with parts and labour warranties of up to 12 years.

Boiler model kW Output Efficiency Warranty Price
Worcester Bosch Greenstar 12Ri Regular Gas Boiler 12kW 92% Up to 10 years £814
Worcester Bosch Greenstar 15Ri Regular Gas Boiler 15kW 92% Up to 10 years £843
Worcester Bosch Greenstar 18Ri Regular Gas Boiler 18kW 92% Up to 10 years £898
Worcester Bosch Greenstar 21Ri Regular Gas Boiler 21kW 92% Up to 10 years £996
Worcester Bosch Greenstar 24Ri Regular Gas Boiler 24kW  92% Up to 10 years £954
Worcester Bosch Greenstar 27Ri Regular Gas Boiler 27kW  92% Up to 10 years £1,114
Worcester Bosch Greenstar 30Ri Regular Gas Boiler 30kW  93% Up to 10 years £1,080

Worcester Bosch system boilers

With a system boiler, you benefit from being able to supply hot water on demand without the need for a cold water storage tank. Unlike a regular boiler, a system boiler connects directly to the mains water supply, which the boiler heats and stores in a hot water cylinder.

If you have more than one bathroom in your property or have a high demand for hot water, a system boiler will be able to meet your needs (as long as your hot water cylinder is big enough and doesn’t run out of hot water).

Worcester Bosch offers a range of system boilers to suit households of every size, starting at 9.2kW and increasing all the way to 99.5kW.

Boiler model kW Output Efficiency Warranty Price
Worcester Bosch Greenstar 9i System Gas Boiler 9.2kW 93% Up to 7 years £899
Worcester Bosch Greenstar 12i System Gas Boiler 12.2kW 94% Up to 7 years £908
Worcester Bosch Greenstar 15i System Gas Boiler 15.3kW 94% Up to 7 years £971
Worcester Bosch Greenstar 18i System Gas Boiler 18.4kW 94% Up to 7 years £1,024
Worcester Bosch Greenstar 21i System Gas Boiler 21.6kW  94% Up to 7 years £1,034
Worcester Bosch Greenstar 24i System Gas Boiler 24.6kW  94% Up to 7 years £1,080
Worcester Bosch Greenstar 27i System Gas Boiler 27kW  92% Up to 7 years £1,067
Worcester Bosch Greenstar 30i System Gas Boiler 30kW 92% Up to 7 years £1,114

Worcester Bosch combi oil boilers

There are roughly 4 million homes in the UK that aren’t connected to the gas network, with these properties relying on other fuel sources to supply heat and hot water.

Worcester Bosch Greenstar Heatslave II combi oil boilers are available in three sizes of output: 15kW, 25kW and 32kW. They are also available as internal or external models, giving you the option of installing your boiler inside or outside your home.

Boiler model kW Output Efficiency Warranty Price
Worcester Bosch Greenstar Heatslave II 12/18 Combi Oil Boiler 18kW 90% Up to 5 years £2,369
Worcester Bosch Greenstar Heatslave II 18/25 Combi Oil Boiler 25kW 90% Up to 5 years £2,395
Worcester Bosch Greenstar Heatslave II 25/32 Combi Oil Boiler 32kW 91% Up to 5 years £2,350
Worcester Bosch Greenstar Heatslave II External 12/18 Combi Oil Boiler 18kW 90% Up to 5 years £2,458
Worcester Bosch Greenstar Heatslave II External 18/25 Combi Oil Boiler 25kW 90% Up to 5 years

£2,564
 Worcester Bosch Greenstar Heatslave II External 25/32 Combi Oil Boiler 32kW  90%  Up to 5 years  £2,772

Worcester Bosch regular oil boilers

Regular oil boilers work in exactly the same way as gas oil boilers, so you will still need to use it alongside as a cold water storage tank and hot water cylinder.

Worcester Bosch manufactures four models of regular oil boilers, available in outputs ranging from 18kW to 70kW.

Boiler model kW Output Efficiency Warranty Price
Worcester Bosch Greenstar Danesmoor 12/18 Regular Oil Boiler 18kW 90% 2 years £1,430
Worcester Bosch Greenstar Danesmoor 18/25 Regular Oil Boiler 25kW 90% 2 years £1,700
Worcester Bosch Greenstar Danesmoor 25/32 Regular Oil Boiler 32kW 90% 2 years £2,102
Worcester Bosch Greenstar Danesmoor External 12/18 Regular Oil Boiler 18kW 90% 2 years £1,890
Worcester Bosch Greenstar Danesmoor External 18/25 Regular Oil Boiler 25kW 90% 2 years

£1,880
Worcester Bosch Greenstar Danesmoor External 25/32 Regular Oil Boiler 32kW  91%  2 years  £2,235

Worcester Bosch system oil boilers

The Worcester Bosch Greenstar Danesmoor is available in three models and each model has outputs of 18kW, 25kW and 32kW. The standard model is floor-standing, the Utility range is specially designed to be wall-mounted and installed inside a kitchen cabinet, and the external model can be fitted outside of your home.

Boiler model kW Output Efficiency Warranty Price
Worcester Bosch Greenstar Danesmoor 12/18 System Oil Boiler 18kW 90% Up to 5 years £1,760
Worcester Bosch Greenstar Danesmoor 18/25 System Oil Boiler 25kW 90% Up to 5 years £1,893
Worcester Bosch Greenstar Danesmoor 25/32 System Oil Boiler 32kW 91% Up to 5 years £2,102
Worcester Bosch Greenstar Danesmoor Utility 12/18 System Oil Boiler 18kW 90% Up to 5 years £1,738
Worcester Bosch Greenstar Danesmoor Utility 18/25 System Oil Boiler 25kW 90% Up to 5 years

£1,820
Worcester Bosch Greenstar Danesmoor Utility 25/32 System Oil Boiler 32kW  91%  Up to 5 years  £2,201
Worcester Bosch Greenstar Danesmoor External 12/18 System Oil Boiler 18kW 90% Up to 5 years £2,143
Worcester Bosch Greenstar Danesmoor External 18/25 System Oil Boiler 25kW 90% Up to 5 years £2,297
Worcester Bosch Greenstar Danesmoor External 25/32 System Oil Boiler 32kW 91% Up to 5 years £2,657
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