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Worcester 25 Si - L RSF LPG - 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.

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Worcester 25 Si - L RSF Efficiency

SAP seasonal efficiency81.1%
Rating bandBand D


ManufacturerWorcester Boilers
Model25 Si - L RSF
Fuel TypeLPG
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)25 - 25
Boiler ID47 311 50
Manufactured From/To1999 - 2001


The Worcester 25 Si - L RSF is a 'D' rated boiler with an efficiency of 81.1%.

The 25 Si - L RSF is a Non-Condensing Combi boiler with a maximum power output of 25kw that uses LPG 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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