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.



Ecomax 828/2E Efficiency

SAP seasonal efficiency


Rating band

Band A


ManufacturerVaillant Boilers
ModelEcomax 828/2E
Fuel TypeLPG
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)22.4 - 22.4
Boiler IDVUW 286/2E-C
Manufactured From/To2001 - 2010


The Vaillant Ecomax 828/2E is an 'A' rated boiler which has an excellent efficiency of 92.2%.

The Ecomax 828/2E is a Condensing Combi boiler with a maximum power output of 22.4kw that uses LPG 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 Vaillant Boilers to the Ecomax 828/2E
(Condensing LPG Combi)

Results ordered by efficiency. Some models may be obsolete.

Vaillant Ecomax 835/2 E

92.5% Efficient

Most Efficient Combi LPG Boilers

Keston C 36P Combi

92.8% Efficient