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Boulter Classic 70/90 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 Classic 70/90 Efficiency

SAP seasonal efficiency81.4%
Rating bandBand D


ManufacturerBoulter Boilers
ModelClassic 70/90
Fuel TypeOil
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)20.5 - 26.4
Boiler ID0001039947
Manufactured From/To1999 - 2001


The Boulter Classic 70/90 is a 'D' rated boiler with an efficiency of 81.4%.

The Classic 70/90 is a Non-Condensing Conventional boiler with a maximum power output of 26.4kw 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.

Similar Boulter Boilers to the Classic 70/90
(Non-Condensing Oil Conventional)

Results ordered by efficiency. Some models may be obsolete.

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