Boiler Efficiency Ratings

Compare new boilers and assess whether your current boiler would be better off being replaced

Our boiler efficiency tables provided by SEDBUK (the seasonal efficiency of domestic boilers in the UK) provide a guide of how effective your boiler is at turning fuel into heat.

You can check your boilers rating by selecting it’s make and model below. Ratings are based on the SEDBUK Rating which is an indicator of its efficiency when used within an average domestic household, it’s a great benchmark for comparing new boilers and also assessing whether your current boiler would be better off being replaced due to low efficiencies.

For new boiler installations call British Gas Boilers on 0333 230 5216 for a no-obligation quote, alternatively visit Boiler Guide to request quotes from independent local and regional heating engineers.



Kabin Pak KP150HE Efficiency

SAP seasonal efficiency


Rating band

Band A


ManufacturerWarmflow Boilers
ModelKabin Pak KP150HE
Fuel TypeOil
Flue TypeOpen
FanFan Assisted
Output (kW)33 - 44
Boiler ID
Manufactured From/To2008 - current


The Warmflow Kabin Pak KP150HE is an 'A' rated boiler which has an excellent efficiency of 91.8%.

The Kabin Pak KP150HE is a Condensing Conventional boiler with a maximum power output of 44kw that uses Oil as its fuel source.

As this boiler is 'A' rated it will provide efficient heating and subsequently reduce fuel bills and carbon dioxide emissions.


Similar Warmflow Boilers to the Kabin Pak KP150HE
(Condensing Oil Conventional)

Results ordered by efficiency. Some models may be obsolete.

Warmflow Utility UP90HE

92.8% Efficient

Warmflow System S90HE

92.8% Efficient

Warmflow Utility U90HE

92.8% Efficient

Warmflow Kabin Pak K90HE

92.8% Efficient

Most Efficient Conventional Oil Boilers

Grant Vortex 36

97.0% Efficient