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GEM - Boiler Efficiency Ratings

Boiler Efficiency Rating

You can find out the energy efficiency of your boiler by checking its energy rating; you can do this now by selecting the make and model below.

A boiler’s energy rating is an indicator of its efficiency when used within an average domestic household. It's a great benchmark for comparing new boilers and can help you work out how much money you could save on energy bills if you replaced your current boiler with a more efficient model.

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