Boiler Efficiency Ratings


Compare new boilers and assess whether your current boiler would be better off being replaced

Our boiler efficiency tables provided by SEDBUK (the seasonal efficiency of domestic boilers in the UK) provide a guide of how effective your boiler is at turning fuel into heat.

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 0333 230 5216 for a no-obligation quote, alternatively visit Boiler Guide to request quotes from independent local and regional heating engineers.

VIEWING DETAILS ABOUT

Worcester

Heat Slave 20/25.OSO Efficiency

SAP seasonal efficiency

81.6%

Rating band

Band D

Specification

ManufacturerWorcester Boilers
ModelHeat Slave 20/25.OSO
Fuel TypeOil
TypeCombi
MethodNon-Condensing
Flue TypeOpen
FanFan Assisted
Output (kW)20 - 25
Boiler IDC14769/4-1
Manufactured From/To1997 - current

Summary

The Worcester Heat Slave 20/25.OSO is a 'D' rated boiler with an efficiency of 81.6%.

The Heat Slave 20/25.OSO is a Non-Condensing Combi boiler with a maximum power output of 25kw that uses Oil as its fuel source.

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

SEDBUK Rating

Similar Worcester Boilers to the Heat Slave 20/25.OSO
(Non-Condensing Oil Combi)

Results ordered by efficiency. Some models may be obsolete.

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