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.



Combi 80 e Efficiency

SAP seasonal efficiency


Rating band

Band D


ManufacturerBaxi Boilers
ModelCombi 80 e
Fuel TypeGas
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)26.3 - 26.3
Boiler IDGC no. 47-075-06
Manufactured From/To2001 - 2011


The Baxi Combi 80 e is a 'D' rated boiler with an efficiency of 78.6%.

The Combi 80 e is a Non-Condensing Combi boiler with a maximum power output of 26.3kw that uses Gas as its fuel source.

Being a 'D' rated boiler it would be worthwhile replacing it with a higher efficiency 'A' rated boiler.


Similar Baxi Boilers to the Combi 80 e
(Non-Condensing Gas Combi)

Results ordered by efficiency. Some models may be obsolete.

Baxi Maxflow Combi WM

79% Efficient

Baxi Maxflow Combi FS

78.9% Efficient

Baxi Combi Instant 80 e

78.6% Efficient

Baxi Combi 80 Eco

78.6% Efficient

Most Efficient Combi Gas Boilers

Alpha CD50

91.2% Efficient