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Maxol Marathon mk1r 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.

Maxol Marathon mk1r Efficiency

SAP seasonal efficiency65%
Rating bandUnknown


ManufacturerMaxol Boilers
ModelMarathon mk1r
Fuel TypeGas
Flue TypeOpen
FanNo Fan
Output (kW) -
Boiler ID4420204
Manufactured From/ToUnknown - 1975


The Maxol Marathon mk1r is unrated, this probably means it's obsolete or very old.

The Marathon mk1r is a Non-Condensing Conventional boiler with a maximum power output of kw that uses Gas as its fuel source.

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

Similar Maxol Boilers to the Marathon mk1r
(Non-Condensing Gas Conventional)

Results ordered by efficiency. Some models may be obsolete.

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