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Boulter Bonus 40/65 Oil - 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.

Boulter Bonus 40/65 Efficiency

SAP seasonal efficiency85.7%
Rating bandBand C


ManufacturerBoulter Boilers
ModelBonus 40/65
Fuel TypeOil
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)11.7 - 19
Boiler ID0001099950
Manufactured From/To1999 - 2005


The Boulter Bonus 40/65 is a 'C' rated boiler with an efficiency of 85.7%.

The Bonus 40/65 is a Non-Condensing Conventional boiler with a maximum power output of 19kw that uses Oil as its fuel source.

Although a 'C' rated boiler is not as efficient as many other modern boilers it's still pretty good, only a marginal reduction in fuel bills and carbon dioxide emissions would be observed by replacing it.

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(Non-Condensing Oil Conventional)

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