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Worcester Highflow 400 RSF 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 Highflow 400 RSF Efficiency

SAP seasonal efficiency79.2%
Rating bandBand D


ManufacturerWorcester Boilers
ModelHighflow 400 RSF
Fuel TypeGas
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)8.8 - 24
Boiler ID47 311 18
Manufactured From/To1997 - 2002


The Worcester Highflow 400 RSF is a 'D' rated boiler with an efficiency of 79.2%.

The Highflow 400 RSF is a Non-Condensing Combi boiler with a maximum power output of 24kw that uses Gas as its fuel source.

Being a 'D' rated boiler it would be worthwhile replacing it with a higher efficiency 'A' rated boiler.

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(Non-Condensing Gas Combi)

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