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Gerkros Gem fdc 50/70 Oil - 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.

Gerkros Gem fdc 50/70 Efficiency

SAP seasonal efficiency84.2%
Rating bandBand C


ManufacturerGerkros Boilers
ModelGem fdc 50/70
Fuel TypeOil
Flue TypeOpen or Room-Sealed
FanFan Assisted
Output (kW)14.65 - 20.51
Boiler ID
Manufactured From/To1988 - current


The Gerkros Gem fdc 50/70 is a 'C' rated boiler with an efficiency of 84.2%.

The Gem fdc 50/70 is a Non-Condensing Conventional boiler with a maximum power output of 20.51kw that uses Oil as its fuel source.

Although a 'C' rated boiler is not as efficient as many other modern boilers it's still pretty good, only a marginal reduction in fuel bills and carbon dioxide emissions would be observed by replacing it.

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(Non-Condensing Oil Conventional)

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