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


Get Free, No Obligation Boiler Quotes

Vaillant Ecomax 635 E LPG - 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.

Vaillant Ecomax 635 E Efficiency

SAP seasonal efficiency92.6%
Rating bandBand A


ManufacturerVaillant Boilers
ModelEcomax 635 E
Fuel TypeLPG
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)34.9 - 34.9
Boiler IDVU GB 356-C
Manufactured From/To2004 - 2010


The Vaillant Ecomax 635 E is an 'A' rated boiler which has an excellent efficiency of 92.6%.

The Ecomax 635 E is a Condensing Conventional boiler with a maximum power output of 34.9kw that uses LPG 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 Vaillant Boilers to the Ecomax 635 E
(Condensing LPG Conventional)

Results ordered by efficiency. Some models may be obsolete.

Most Efficient Conventional LPG Boilers