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GEM - Boiler Efficiency Ratings

Boiler Efficiency Rating

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 0800 327 7119 for a no-obligation quote, alternatively visit Boiler Guide to request quotes from independent local and regional heating engineers.

GEM Boilers

ModelTypeFuelEfficiencyMore Info
GEM CC1 15/20 Condensing Oil 90.0% More Info
GEM CC2 20/26 Condensing Oil 90.0% More Info
GEM CC3 26/35 Condensing Oil 90.2% More Info
GEM CC4 35/41 Condensing Oil 90.2% More Info
GEM CKUT1 15/20 Condensing Oil 92.8% More Info
GEM CKUT2 20/26 Condensing Oil 92.8% More Info
GEM CKUT3 26/35 Condensing Oil 93.0% More Info
GEM CKUT4 35/41 Condensing Oil 93.0% More Info
GEM COD C1 15/20 Condensing Oil 90.0% More Info
GEM COD C2 20/26 Condensing Oil 90.0% More Info
GEM COD C3 26/35 Condensing Oil 90.2% More Info
GEM COD C4 35/41 Condensing Oil 90.2% More Info
GEM COD1 15/20 Condensing Oil 92.8% More Info
GEM COD1 SS 15/20 Condensing Oil 92.8% More Info
GEM COD2 20/26 Condensing Oil 92.8% More Info
GEM COD2 SS 20/26 Condensing Oil 92.8% More Info
GEM COD3 26/35 Condensing Oil 93.0% More Info
GEM COD3 SS 26/35 Condensing Oil 93.0% More Info
GEM COD4 35/41 Condensing Oil 93.0% More Info
GEM COD4 SS 35/41 Condensing Oil 93.0% More Info
GEM CS1 15/20 Condensing Oil 92.8% More Info
GEM CS2 20/26 Condensing Oil 92.8% More Info
GEM CS3 26/35 Condensing Oil 93.0% More Info
GEM CS4 35/41 Condensing Oil 93.0% More Info
GEM E-Compact 50/70 Boiler House Condensing Oil 94.5% More Info
GEM E-Compact 50/70 Cosyman Condensing Oil 94.5% More Info
GEM E-Compact 70/90 Boiler House Condensing Oil 93.5% More Info
GEM E-Compact 70/90 Cosyman Condensing Oil 93.5% More Info