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.


Potterton Myson

Statesman System 65/85 Efficiency

SAP seasonal efficiency


Rating band

Band D


ManufacturerPotterton Myson Boilers
ModelStatesman System 65/85
Fuel TypeOil
Flue TypeOpen
FanFan Assisted
Output (kW)19.0 - 25.0
Boiler IDLNA
Manufactured From/To1996 - 2001


The Potterton Myson Statesman System 65/85 is a 'D' rated boiler with an efficiency of 81.1%.

The Statesman System 65/85 is a Non-Condensing Conventional boiler with a maximum power output of 25.0kw that uses Oil as its fuel source.

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


Similar Potterton Myson Boilers to the Statesman System 65/85
(Non-Condensing Oil Conventional)

Results ordered by efficiency. Some models may be obsolete.

Most Efficient Conventional Oil Boilers

Grant Vortex 36

97.0% Efficient