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.



Camray Quartet 40/60 B Efficiency

SAP seasonal efficiency


Rating band



ManufacturerBoulter Boilers
ModelCamray Quartet 40/60 B
Fuel TypeOil
Flue TypeRoom-Sealed
FanNo Fan
Output (kW)12 - 17
Boiler ID
Manufactured From/ToUnknown - obsolete


The Boulter Camray Quartet 40/60 B is unrated, this probably means it's obsolete or very old.

The Camray Quartet 40/60 B is a Non-Condensing Conventional boiler with a maximum power output of 17kw that uses Oil as its fuel source.

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


Similar Boulter Boilers to the Camray Quartet 40/60 B
(Non-Condensing Oil Conventional)

Results ordered by efficiency. Some models may be obsolete.

Boulter Bonus 40/65

85.7% Efficient

Boulter Eco-System 12/19

85.7% Efficient

Most Efficient Conventional Oil Boilers

Grant Vortex 36

97.0% Efficient