Compare the UK's most-fitted boilers
The 12 boilers UK installers actually fit, side by side on output, hot water, efficiency and warranty. Got a preference? Say so on the form and we'll pass it on.
Worcester Bosch
Greenstar 4000
- Type
- Combi
- Output
- 30 kW
- Efficiency
- 94% · ErP A
- Warranty
- Up to 12 yrs
- Best for
- The long warranty, and engineers everywhere know them
Worcester Bosch
Greenstar 8000 Life
- Type
- Combi
- Output
- 35 kW
- Efficiency
- 94% · ErP A
- Warranty
- Up to 12 yrs
- Best for
- Big houses, two bathrooms, strong showers
Worcester Bosch
Greenstar 2000
- Type
- Combi
- Output
- 25 kW
- Efficiency
- 94% · ErP A
- Warranty
- Up to 10 yrs
- Best for
- Worcester quality on a tighter budget
Vaillant
ecoTEC Plus 832
- Type
- Combi
- Output
- 32 kW
- Efficiency
- 94% · ErP A
- Warranty
- Up to 10 yrs
- Best for
- The best shower in its class
Vaillant
ecoFIT Pure 830
- Type
- Combi
- Output
- 30 kW
- Efficiency
- 94% · ErP A
- Warranty
- Up to 10 yrs
- Best for
- Vaillant engineering, less of the Vaillant price
Ideal
Logic Max Combi C30
- Type
- Combi
- Output
- 30 kW
- Efficiency
- 94% · ErP A
- Warranty
- Up to 10 yrs
- Best for
- The value pick most installers rate
Ideal
Vogue Max Combi C40
- Type
- Combi
- Output
- 40 kW
- Efficiency
- 94% · ErP A
- Warranty
- Up to 12 yrs
- Best for
- Serious hot water demand
Baxi
800 Combi 2
- Type
- Combi
- Output
- 30 kW
- Efficiency
- 94% · ErP A
- Warranty
- Up to 10 yrs
- Best for
- British-built, easy to get parts for
Baxi
600 Combi 2
- Type
- Combi
- Output
- 24 kW
- Efficiency
- 93% · ErP A
- Warranty
- Up to 7 yrs
- Best for
- Straightforward, cheap, does the job
Viessmann
Vitodens 100-W
- Type
- Combi
- Output
- 30 kW
- Efficiency
- 94% · ErP A
- Warranty
- Up to 10 yrs
- Best for
- German build, stainless heat exchanger
Viessmann
Vitodens 050-W
- Type
- Combi
- Output
- 29 kW
- Efficiency
- 93% · ErP A
- Warranty
- Up to 7 yrs
- Best for
- The cheapest way into Viessmann
Glow-worm
Energy7 30c
- Type
- Combi
- Output
- 30 kW
- Efficiency
- 94% · ErP A
- Warranty
- Up to 7 yrs
- Best for
- Vaillant's budget brand, and it shows in a good way
We don't publish prices. What a boiler costs to fit depends on your flue, your gas run and the state of your system, and only the engineer standing in your house can tell you that. Warranties are the manufacturer's maximum and usually require installation by an accredited engineer plus an annual service. We are independent and not endorsed by any manufacturer. Logos and model names belong to their owners.
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