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.



Ultracom 2 30cxi Efficiency

SAP seasonal efficiency


Rating band

Band A


ManufacturerGlow-worm Boilers
ModelUltracom 2 30cxi
Fuel TypeLPG
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)24.6 - 24.6
Boiler IDG.C.No.47-019-11
Manufactured From/To2010 - current


The Glow-worm Ultracom 2 30cxi is an 'A' rated boiler which has an excellent efficiency of 92.4%.

The Ultracom 2 30cxi is a Condensing Combi boiler with a maximum power output of 24.6kw that uses LPG as its fuel source.

As this boiler is 'A' rated it will provide efficient heating and subsequently reduce fuel bills and carbon dioxide emissions.


Similar Glow-worm Boilers to the Ultracom 2 30cxi
(Condensing LPG Combi)

Results ordered by efficiency. Some models may be obsolete.

Most Efficient Combi LPG Boilers

Keston C 36P Combi

92.8% Efficient

Ravenheat Combistore 32 LPG

92.8% Efficient