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.



Systemiser SE Efficiency

SAP seasonal efficiency


Rating band

Band B


ManufacturerIdeal Boilers
ModelSystemiser SE
Fuel TypeGas
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)24.0 - 24.0
Boiler IDG.C.No 41 349 70
Manufactured From/ToUnknown - 2001


The Ideal Systemiser SE is a 'B' rated boiler which has good efficiency of 88.4%.

The Systemiser SE is a Condensing Conventional boiler with a maximum power output of 24.0kw that uses Gas as its fuel source.

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


Similar Ideal Boilers to the Systemiser SE
(Condensing Gas Conventional)

Results ordered by efficiency. Some models may be obsolete.

Ideal Logic + Heat 12

91.2% Efficient

Ideal Logic Heat 12

91.2% Efficient

Ideal Vogue s18

91.1% Efficient

Ideal Vogue s32

91.1% Efficient

Most Efficient Conventional Gas Boilers

Baxi Solo 15 HE A

91.3% Efficient

Main 15 HE A

91.3% Efficient

Potterton Promax SL 15

91.3% Efficient

Potterton Gold H 15

91.3% Efficient