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Mistral CS1 - 5070 Sealed System Oil - 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 0333 230 5216 for a no-obligation quote. Alternatively visit Boiler Guide to request quotes from independent local and regional heating engineers.

Mistral CS1 - 5070 Sealed System Efficiency

SAP seasonal efficiency92.5%
Rating bandBand A


ManufacturerMistral Boilers
ModelCS1 - 5070 Sealed System
Fuel TypeOil
Flue TypeOpen or Room-Sealed
FanNo Fan
Output (kW)14.6 - 20.5
Boiler ID
Manufactured From/To2003 - current


The Mistral CS1 - 5070 Sealed System is an 'A' rated boiler which has an excellent efficiency of 92.5%.

The CS1 - 5070 Sealed System is a Condensing Conventional boiler with a maximum power output of 20.5kw that uses Oil 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 Mistral Boilers to the CS1 - 5070 Sealed System
(Condensing Oil Conventional)

Results ordered by efficiency. Some models may be obsolete.

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