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


Get Free, No Obligation Boiler Quotes

Worcester Bosch Greenstar ZWBR 7-25A 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.

Worcester Bosch Greenstar ZWBR 7-25A Efficiency

SAP seasonal efficiency90.7%
Rating bandBand A


ManufacturerWorcester Boilers
ModelBosch Greenstar ZWBR 7-25A
Fuel TypeGas
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)25.3 - 25.3
Boiler ID47 311 44
Manufactured From/To1999 - 2001


The Worcester Bosch Greenstar ZWBR 7-25A is an 'A' rated boiler which has an excellent efficiency of 90.7%.

The Bosch Greenstar ZWBR 7-25A is a Condensing Combi boiler with a maximum power output of 25.3kw 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 Worcester Boilers to the Bosch Greenstar ZWBR 7-25A
(Condensing Gas Combi)

Results ordered by efficiency. Some models may be obsolete.

Most Efficient Combi Gas Boilers