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Glow-worm 105-120B 105-120B 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.

Glow-worm 105-120B 105-120B Efficiency

SAP seasonal efficiency65%
Rating bandUnknown


ManufacturerGlow-worm Boilers
Model105-120B 105-120B
Fuel TypeGas
Flue TypeRoom-Sealed
FanNo Fan
Output (kW)35.2 - 35.2
Boiler ID4131556
Manufactured From/ToUnknown - 1985


The Glow-worm 105-120B 105-120B is unrated, this probably means it's obsolete or very old.

The 105-120B 105-120B is a Non-Condensing Conventional boiler with a maximum power output of 35.2kw 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 Glow-worm Boilers to the 105-120B 105-120B
(Non-Condensing Gas Conventional)

Results ordered by efficiency. Some models may be obsolete.

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