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HRM Boilers Wallstar 25/19 20 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.

HRM Boilers Wallstar 25/19 20 Efficiency

SAP seasonal efficiency82.7%
Rating bandBand C


ManufacturerHRM Boilers Boilers
ModelWallstar 25/19 20
Fuel TypeOil
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)19 - 25.4
Boiler ID20020308
Manufactured From/To2002 - current


The HRM Boilers Wallstar 25/19 20 is a 'C' rated boiler with an efficiency of 82.7%.

The Wallstar 25/19 20 is a Non-Condensing Combi boiler with a maximum power output of 25.4kw 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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