Sime - Boiler Efficiency Rating

Compare new boilers and assess whether your current boiler needs to be replaced.

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.

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.

How efficient is your boiler?

Select your boiler using the dropdown below to find out.

Sime Boilers

SimeBrava DGT HE35CondensingGas90.8%
SimeBrava DGT HE25CondensingGas90.4%
SimeBrava DGT HE30CondensingGas90.3%
SimeBrava DGT HE35CondensingLPG92.2%
SimeBrava DGT HE25CondensingLPG92.2%
SimeBrava DGT HE30CondensingLPG91.8%
SimeEcomfortSystem Plus 25 HECondensingGas90.6%
SimeEcomfortPlus 30 HECondensingGas90.5%
SimeEcomfortPlus 25 HECondensingGas90.5%
SimeEcomfortSystem 25 HECondensingGas88.1%
SimeEcomfort25 HECondensingGas88.0%
SimeEcomfort35 HECondensingGas87.3%
SimeEcomfortSystem Plus 25 HECondensingLPG91.7%
SimeEcomfortPlus 30 HECondensingLPG91.6%
SimeEcomfortPlus 25 HECondensingLPG91.6%
SimeEcomfortSystem 25 HECondensingLPG89.1%
SimeEcomfort25 HECondensingLPG89%
SimeEcomfort35 HECondensingLPG88.3%
SimeEstelle HE5CondensingOil93.5%
SimeEstelle HE4CondensingOil93.2%
SimeEstelle HEB4 INOXCondensingOil90.4%
SimeFormat100 BNon-CondensingGas80.3%
SimeFormat80 BNon-CondensingGas80.3%
SimeFormat100 BNon-CondensingLPG82.2%
SimeFormat80 BNon-CondensingLPG82.2%
SimeFormat DGT HE12 SystemCondensingGas90.4%
SimeFormat DGT HE30CondensingGas90.3%
SimeFormat DGT HE35CondensingGas90.3%
SimeFormat DGT HE20 SystemCondensingGas90.1%
SimeFormat DGT HE25CondensingGas90.0%
SimeFormat DGT HE25/15CondensingGas90.0%
SimeFormat DGT HE12 SystemCondensingLPG92.2%
SimeFormat DGT HE35CondensingLPG92.1%
SimeFormat DGT HE30CondensingLPG91.8%
SimeFormat DGT HE20 SystemCondensingLPG91.4%
SimeFormat DGT HE25CondensingLPG91.3%
SimeFormat DGT HE25/15CondensingLPG91.3%
SimeMeridian HE25CondensingGas90.4%
SimeMeridian HE30CondensingGas90.3%
SimeMeridian HE25CondensingLPG92.2%
SimeMeridian HE30CondensingLPG91.8%
SimeMurelle Equipe50BOXCondensingGas90.1%
SimeMurelle Equipe50BOXCondensingLPG91.8%
SimeMurelle EV HE35 TCondensingGas90.8%
SimeMurelle EV HE35 SystemCondensingGas90.8%
SimeMurelle EV HE30/55CondensingGas90.8%
SimeMurelle EV HE35CondensingGas90.7%
SimeMurelle EV HE25/55CondensingGas90.7%
SimeMurelle EV HE30 TCondensingGas90.5%
SimeMurelle EV HE30 SystemCondensingGas90.5%
SimeMurelle EV HE25 TCondensingGas90.4%
SimeMurelle EV HE30CondensingGas90.4%
SimeMurelle EV HE25 SystemCondensingGas90.4%
SimeMurelle EV HE20 SystemCondensingGas90.3%
SimeMurelle EV HE25CondensingGas90.3%
SimeMurelle EV HE12 SystemCondensingGas90.3%
SimeMurelle EV HE12 TCondensingGas90.3%
SimeMurelle EV HE20 TCondensingGas90.3%
SimeMurelle EV HE30/55CondensingLPG92.1%
SimeMurelle EV HE30 SystemCondensingLPG91.9%
SimeMurelle EV HE30 TCondensingLPG91.9%
SimeMurelle EV HE35 SystemCondensingLPG91.9%
SimeMurelle EV HE35 TCondensingLPG91.9%
SimeMurelle EV HE30CondensingLPG91.8%
SimeMurelle EV HE25 TCondensingLPG91.8%
SimeMurelle EV HE35CondensingLPG91.8%
SimeMurelle EV HE25 SystemCondensingLPG91.8%
SimeMurelle EV HE25/55CondensingLPG91.8%
SimeMurelle EV HE25CondensingLPG91.7%
SimeMurelle EV HE20 SystemCondensingLPG91.5%
SimeMurelle EV HE20 TCondensingLPG91.5%
SimeMurelle EV HE12 TCondensingLPG91.4%
SimeMurelle EV HE12 SystemCondensingLPG91.4%
SimeMurelle HE35 SystemCondensingGas90.8%
SimeMurelle HE30/55 BFCondensingGas90.8%
SimeMurelle HE35 BFTCondensingGas90.8%
SimeMurelle HE35 BFCondensingGas90.7%
SimeMurelle HE25/55 BFCondensingGas90.7%
SimeMurelle HE30 BFTCondensingGas90.5%
SimeMurelle HE30 SystemCondensingGas90.5%
SimeMurelle HE25 BFTCondensingGas90.4%
SimeMurelle HE30 BFCondensingGas90.4%
SimeMurelle HE25 SystemCondensingGas90.4%
SimeMurelle HE12 SystemCondensingGas90.3%
SimeMurelle HE25 BFCondensingGas90.3%
SimeMurelle HE50RCondensingGas90.3%
SimeMurelle HE20 SystemCondensingGas90.3%
SimeMurelle HE12 BFTCondensingGas90.3%
SimeMurelle HE20 BFTCondensingGas90.3%
SimeMurelle HE35 R MCondensingGas90.1%
SimeMurelle HE35RCondensingGas90.1%
SimeMurelle HE30/55 BFCondensingLPG92.1%
SimeMurelle HE35RCondensingLPG92.0%
SimeMurelle HE35R MCondensingLPG92.0%
SimeMurelle HE50R MCondensingLPG92.0%
SimeMurelle HE50RCondensingLPG92%
SimeMurelle HE35 BFTCondensingLPG91.9%
SimeMurelle HE30 BFTCondensingLPG91.9%
SimeMurelle HE35 SystemCondensingLPG91.9%
SimeMurelle HE30 SystemCondensingLPG91.9%
SimeMurelle HE25/55 BFCondensingLPG91.8%
SimeMurelle HE25 BFTCondensingLPG91.8%
SimeMurelle HE30 BFCondensingLPG91.8%
SimeMurelle HE35 BFCondensingLPG91.8%
SimeMurelle HE25 SystemCondensingLPG91.8%
SimeMurelle HE25 BFCondensingLPG91.7%
SimeMurelle HE20 SystemCondensingLPG91.5%
SimeMurelle HE20 BFTCondensingLPG91.5%
SimeMurelle HE12 SystemCondensingLPG91.4%
SimeMurelle HE12 BFTCondensingLPG91.4%
SimeMurelle HE 50R MCondensingGas90.3%
SimeMurelle HM35TCondensingGas90.8%
SimeMurelle HM25TCondensingGas90.8%
SimeMurelle HM35CondensingGas90.7%
SimeMurelle HM25CondensingGas90.7%
SimeMurelle HM30CondensingGas90.1%
SimeMurelle HM35TCondensingLPG92.7%
SimeMurelle HM35CondensingLPG92.6%
SimeMurelle HM25TCondensingLPG92.3%
SimeMurelle HM25CondensingLPG92.2%
SimeMurelle HM30CondensingLPG91.2%

What are SEDBUK Efficiency Ratings?

From 1999 to 2015 boilers were ranked on the SEDBUK scale which stands for ‘Seasonal Efficiency of a Domestic Boiler in the UK’. While many still refer to SEDBUK as the standard energy rating scale, it was actually replaced in 2015 by the Energy related Products directive, or ErP. It’s directly related to the EU’s ambition to improve the energy efficiency of our homes and achieve the following targets by 2020:

  • 20% reduction in EU greenhouse gas emissions (compared to 1990 levels)
  • 20% improvement in overall energy efficiency (across the EU)
  • 20% more energy produced from renewable resources such as solar or biomass.

Under the current ErP standards, boiler manufacturers are required to label their products with a rating from A++ to G, with G being the least efficient a boiler can be. In September 2019, efficiency grade A+++ will be added and the least efficient class, G, will be removed as an option, removing these products from the market as a result.

How Much Money Could I Save with a More Efficient Boiler

To understand how a new boiler could save you money, you need to consider the energy that an inefficient boiler is wasting. For example, if a boiler is only 70% efficient, for every £1 you spend on heating your home, 30p is being wasted on lost energy. If your new boiler can reach efficiency of 90%, that is just 10p lost of every £1. So that’s a saving of 20p in every £1 which really adds up over time.

The financial savings you could make by replacing your boiler with a more efficient model can be significant, but will vary depending on the size of your home, the fuel used by the boiler and the inefficiency of your existing boiler.

According to the Energy Saving Trust: “Replacing an old gas boiler with a programmer and room thermostat, with a new A-rated condensing boiler with a programmer, room thermostat and thermostatic radiator controls (TRVs) could save you:

Old Boiler ErP RatingEfficiencyDetached houseSemi-detached houseMid-terrace house
D78 – 82%£170£110£100
E74 – 78%£190£125£105

Figures taken from the latest research by the Energy Saving Trust. Based on fuel prices as of April 2017.

For new boiler installations visit Boiler Guide to request quotes from independent local and regional heating engineers.