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.

Alpha Boilers

ModelTypeFuelEfficiency
Alpha 240E Alpha Combimax 350Non-CondensingGas78.7%
Alpha 240E Non-CondensingGas78.3%
Alpha 240p Non-CondensingGas70%
Alpha 240X Non-CondensingGas74.3%
Alpha 240xe Non-CondensingGas70%
Alpha 240xp Non-CondensingGas70%
Alpha 280E Alpha Combimax 600Non-CondensingGas79.3%
Alpha 280E Non-CondensingGas78.9%
Alpha 280P Non-CondensingGas74.9%
Alpha 500E Non-CondensingGas78.6%
Alpha C23 Non-CondensingGas78.9%
Alpha C27 Non-CondensingGas78.9%
Alpha CB24 Non-CondensingGas79.2%
Alpha CB24X Non-CondensingGas79.2%
Alpha CB28 Non-CondensingGas80.1%
Alpha CB28X Non-CondensingGas80.1%
Alpha CB50 Non-CondensingGas80.3%
Alpha CD 25 C CondensingGas90.2%
Alpha CD 25 C CondensingLPG91.9%
Alpha CD 28 C CondensingGas90.3%
Alpha CD 28 C CondensingLPG91.6%
Alpha CD 35 C CondensingGas90.5%
Alpha CD 35 C CondensingLPG92.4%
Alpha CD 50 S CondensingGas90.4%
Alpha CD 50 S CondensingLPG91.4%
Alpha CD 70 S CondensingGas90.0%
Alpha CD 70 S CondensingLPG91.3%
Alpha CD12S CondensingGas90.1%
Alpha CD12S CondensingLPG91.2%
Alpha CD13R CondensingGas90.1%
Alpha CD13R CondensingLPG91.1%
Alpha CD18R CondensingGas90.1%
Alpha CD18R CondensingLPG91.2%
Alpha CD18S CondensingGas90.5%
Alpha CD18S CondensingLPG91.5%
Alpha CD20S CondensingGas90.1%
Alpha CD20S CondensingLPG91.5%
Alpha CD24C CondensingGas90.7%
Alpha CD24C CondensingLPG91.8%
Alpha CD24R CondensingGas90.3%
Alpha CD24R CondensingLPG91.3%
Alpha CD24S CondensingGas90.8%
Alpha CD24S CondensingLPG91.9%
Alpha CD25X CondensingGas90.1%
Alpha CD25X CondensingLPG91.3%
Alpha CD28S CondensingGas90.1%
Alpha CD28S CondensingLPG91.6%
Alpha CD28X CondensingGas90.1%
Alpha CD28X CondensingLPG91.2%
Alpha CD30S CondensingGas90.4%
Alpha CD32C CondensingLPG92.0%
Alpha CD32C CondensingGas90.7%
Alpha CD50 CondensingGas91.2%
Alpha CD50 CondensingLPG92.5%
Alpha Eco CondensingGas90.3%
Alpha HE CB25 CondensingGas86.7%
Alpha HE CB33 CondensingGas86.7%
Alpha HE SY25 CondensingGas86.8%
Alpha InTec 12S CondensingGas90.1%
Alpha InTec 12S CondensingLPG91.4%
Alpha InTec 18S CondensingGas90.4%
Alpha InTec 18S CondensingLPG92.4%
Alpha InTec 24X CondensingGas90.3%
Alpha InTec 24X CondensingLPG92.3%
Alpha InTec 26C CondensingGas90.3%
Alpha InTec 26C CondensingLPG92.3%
Alpha InTec 28S CondensingGas90.6%
Alpha InTec 28S CondensingLPG91.9%
Alpha InTec 28X CondensingGas90.0%
Alpha InTec 28X CondensingLPG91.1%
Alpha InTec 30C CondensingGas90.0%
Alpha InTec 30C CondensingLPG91.1%
Alpha InTec 30GS CondensingGas90.5%
Alpha InTec 30GS CondensingLPG91.8%
Alpha InTec 34C CondensingGas90.5%
Alpha InTec 34C CondensingLPG91.8%
Alpha InTec 40 GS CondensingLPG92.2%
Alpha InTec 40GS CondensingGas90.8%
Alpha InTec 50 CS CondensingGas90.6%
Alpha InTec 50 CS CondensingLPG91.7%
Alpha SY24 Non-CondensingGas79.3%