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Worcester Heatslave 2 g40of 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.

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Worcester Heatslave 2 g40of Efficiency

SAP seasonal efficiency65%
Rating bandUnknown


ManufacturerWorcester Boilers
ModelHeatslave 2 g40of
Fuel TypeGas
Flue TypeOpen
FanNo Fan
Output (kW)11.72 - 11.72
Boiler ID4131114
Manufactured From/ToUnknown - 1984


The Worcester Heatslave 2 g40of is unrated, this probably means it's obsolete or very old.

The Heatslave 2 g40of is a Non-Condensing Conventional boiler with a maximum power output of 11.72kw that uses Gas as its fuel source.

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

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(Non-Condensing Gas Conventional)

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