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Ferroli Sigma 30 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.

Ferroli Sigma 30 Efficiency

SAP seasonal efficiency76.9%
Rating bandBand E


ManufacturerFerroli Boilers
ModelSigma 30
Fuel TypeGas
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)5.5 - 8.8
Boiler ID
Manufactured From/To1999 - 2001


The Ferroli Sigma 30 is an 'E' rated boiler with an efficiency of 76.9%.

The Sigma 30 is a Non-Condensing Conventional boiler with a maximum power output of 8.8kw that uses Gas as its fuel source.

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

Similar Ferroli Boilers to the Sigma 30
(Non-Condensing Gas Conventional)

Results ordered by efficiency. Some models may be obsolete.

Most Efficient Conventional Gas Boilers