News, Views & Reviews on Domestic Central Heating, Boiler & Renewable Energy


Get Free, No Obligation Boiler Quotes

Viessmann Vitodens 100-W BPJA 21kW P25 Gas - 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.

Viessmann Vitodens 100-W BPJA 21kW P25 Efficiency

SAP seasonal efficiency90.2%
Rating bandBand A


ManufacturerViessmann Boilers
ModelVitodens 100-W BPJA 21kW P25
Fuel TypeGas
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)19.1 - 19.1
Boiler ID
Manufactured From/To2012 - current


The Viessmann Vitodens 100-W BPJA 21kW P25 is an 'A' rated boiler which has an excellent efficiency of 90.2%.

The Vitodens 100-W BPJA 21kW P25 is a Condensing Combi boiler with a maximum power output of 19.1kw 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 Viessmann Boilers to the Vitodens 100-W BPJA 21kW P25
(Condensing Gas Combi)

Results ordered by efficiency. Some models may be obsolete.

Most Efficient Combi Gas Boilers