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.



Hero 75 Efficiency

SAP seasonal efficiency


Rating band

Band D


ManufacturerHalstead Boilers
ModelHero 75
Fuel TypeGas
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)22 - 22.0
Boiler IDHR 75
Manufactured From/To2002 - 2006


The Halstead Hero 75 is a 'D' rated boiler with an efficiency of 78.4%.

The Hero 75 is a Non-Condensing Conventional boiler with a maximum power output of 22.0kw 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 Halstead Boilers to the Hero 75
(Non-Condensing Gas Conventional)

Results ordered by efficiency. Some models may be obsolete.

Halstead Wickes LW 60 ci

79.2% Efficient

Halstead Best 60 db

79.2% Efficient

Halstead Hero 30

79.2% Efficient

Halstead Hero 60

79.1% 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