News, Views & Reviews on Domestic Central Heating, Boiler & Renewable Energy


Get Free, No Obligation Boiler Quotes

DD Heating Heatline S20S Compact Gas - Boiler Efficiency Ratings

Boiler Efficiency Rating

You can find out the energy efficiency of your boiler by checking its energy rating; you can do this now by selecting the make and model below.

A boiler’s energy rating is an indicator of its efficiency when used within an average domestic household. It's a great benchmark for comparing new boilers and can help you work out how much money you could save on energy bills if you replaced your current boiler with a more efficient model.

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.

DD Heating Heatline S20S Compact Efficiency

SAP seasonal efficiency79.4%
Rating bandBand D


ManufacturerDD Heating Boilers
ModelHeatline S20S Compact
Fuel TypeGas
Flue TypeRoom-Sealed
FanFan Assisted
Output (kW)21.1 - 21.1
Boiler ID
Manufactured From/To2003 - 2007


The DD Heating Heatline S20S Compact is a 'D' rated boiler with an efficiency of 79.4%.

The Heatline S20S Compact is a Non-Condensing Conventional boiler with a maximum power output of 21.1kw that uses Gas as its fuel source.

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

Similar DD Heating Boilers to the Heatline S20S Compact
(Non-Condensing Gas Conventional)

Results ordered by efficiency. Some models may be obsolete.

Most Efficient Conventional Gas Boilers