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Atag Q25SC Gas - 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.

Atag Q25SC Efficiency

SAP seasonal efficiency90.3%
Rating bandBand A


ManufacturerAtag Boilers
Fuel TypeGas
Flue TypeOpen or Room-Sealed
FanFan Assisted
Output (kW)21.9 - 21.9
Boiler IDGC No. 41-310-08
Manufactured From/To2007 - current


The Atag Q25SC is an 'A' rated boiler which has an excellent efficiency of 90.3%.

The Q25SC is a Condensing Conventional boiler with a maximum power output of 21.9kw that uses Gas as its fuel source.

As this boiler is 'A' rated it will provide efficient heating and subsequently reduce fuel bills and carbon dioxide emissions.

Similar Atag Boilers to the Q25SC
(Condensing Gas Conventional)

Results ordered by efficiency. Some models may be obsolete.

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