Fonderie 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.

Fonderie Sime Boilers

Fonderie Sime1 R 4 FreestandingNon-CondensingOil82.7%
Fonderie Sime1 R 5 FreestandingNon-CondensingOil83.1%
Fonderie Sime1 R 6 FreestandingNon-CondensingOil83.4%
Fonderie SimeDewy 30/130 HE FSCondensingGas90.7%
Fonderie SimeDewy 30/130 HE FSCondensingLPG92.7%
Fonderie SimeDewy 30/80 HE FSCondensingGas90.7%
Fonderie SimeDewy 30/80 HE FSCondensingLPG92.7%
Fonderie SimeDewy HE 30/50 WMCondensingGas90.2%
Fonderie SimeDewy HE 30/50 WM LPGCondensingLPG91.2%
Fonderie SimeEcomfort 30 HECondensingGas87.9%
Fonderie SimeEcomfort 30 HE LPGCondensingLPG88.8%
Fonderie SimeEstelle 3Non-CondensingOil84.5%
Fonderie SimeEstelle 4Non-CondensingOil84.7%
Fonderie SimeEstelle 5Non-CondensingOil84.9%
Fonderie SimeEstelle 6Non-CondensingOil85.0%
Fonderie SimeEstelle 7Non-CondensingOil85.2%
Fonderie SimeFE-25HE UK/1 NCondensingGas90.0%
Fonderie SimeFE-25HE UK/1 NCondensingLPG92.1%
Fonderie SimeFE-30HE UK/1 NCondensingGas90.2%
Fonderie SimeFE-30HE UK/1 NCondensingLPG92.3%
Fonderie SimeFormat 100 CNon-CondensingGas79.2%
Fonderie SimeFormat 100 CNon-CondensingLPG81.0%
Fonderie SimeFormat 100 C TSNon-CondensingGas80.3%
Fonderie SimeFormat 100 C TS LPGNon-CondensingLPG82.2%
Fonderie SimeFormat 110 CNon-CondensingGas78.4%
Fonderie SimeFormat 110 C LPGNon-CondensingLPG80.2%
Fonderie SimeFormat 110 C TSNon-CondensingGas80.3%
Fonderie SimeFormat 110 C TS LPGNon-CondensingLPG82.2%
Fonderie SimeFormat 25 HECondensingGas90%
Fonderie SimeFormat 25 HE LPGCondensingLPG92.1%
Fonderie SimeFormat 30 HECondensingGas90.2%
Fonderie SimeFormat 30 HE LPGCondensingLPG92.3%
Fonderie SimeFormat 80 CNon-CondensingGas79%
Fonderie SimeFormat 80 CNon-CondensingLPG80.8%
Fonderie SimeFormat 80 C TSNon-CondensingGas80.3%
Fonderie SimeFormat 80 C TS LPGNon-CondensingLPG82.2%
Fonderie SimeFormat System 24Non-CondensingGas79.1%
Fonderie SimeFormat System 24Non-CondensingLPG80.9%
Fonderie SimeFormat System 24 EINon-CondensingGas79.1%
Fonderie SimeFormat System 24 EINon-CondensingLPG80.9%
Fonderie SimeFormat System 24TSNon-CondensingGas80.4%
Fonderie SimeFormat System 24TS LPGNon-CondensingLPG82.3%
Fonderie SimeFormat System 25 HECondensingGas90.1%
Fonderie SimeFormat System 25 HE LPGCondensingLPG92.2%
Fonderie SimeFormat System 30Non-CondensingGas79.3%
Fonderie SimeFormat System 30Non-CondensingLPG81.1%
Fonderie SimeFormat System 30 EINon-CondensingGas79.3%
Fonderie SimeFormat System 30 EINon-CondensingLPG81.1%
Fonderie SimeFormat System 30 HECondensingGas90.3%
Fonderie SimeFormat System 30 HE LPGCondensingLPG92.4%
Fonderie SimeFormat System 30TSNon-CondensingGas80.4%
Fonderie SimeFormat System 30TS LPGNon-CondensingLPG82.3%
Fonderie SimeFormat System 35TSNon-CondensingGas80.4%
Fonderie SimeFormat System 35TS LPGNon-CondensingLPG82.3%
Fonderie SimeFriendly Format 100 ENon-CondensingLPG80.4%
Fonderie SimeFriendly Format 100ENon-CondensingGas78.6%
Fonderie SimeFriendly Format 80Non-CondensingLPG81.1%
Fonderie SimeFriendly Format 80 ENon-CondensingLPG81.1%
Fonderie SimePlanet Dewy 110CondensingGas89.9%
Fonderie SimePlanet Dewy 110CondensingLPG91.0%
Fonderie SimePlanet Dewy 110 ACondensingGas90.3%
Fonderie SimePlanet Dewy 110 A (LPG)CondensingLPG92.3%
Fonderie SimePlanet Dewy 110 T ACondensingGas90.4%
Fonderie SimePlanet Dewy 110 T A (LPG)CondensingLPG92.4%
Fonderie SimePlanet Dewy 90CondensingGas89.3%
Fonderie SimePlanet Dewy 90CondensingLPG90.3%
Fonderie SimePlanet Dewy 90 ACondensingGas90.2%
Fonderie SimePlanet Dewy 90 A (LPG)CondensingLPG92.2%
Fonderie SimePlanet Super 4 F.S.Non-CondensingGas80.5%
Fonderie SimePlanet Super 4 F.S.Non-CondensingLPG82.3%
Fonderie SimePlanet Super 4 W.MNon-CondensingGas80.7%
Fonderie SimePlanet Super 4 W.M..Non-CondensingLPG82.6%
Fonderie SimeRondo 3Non-CondensingOil84.5%
Fonderie SimeRondo 4Non-CondensingOil84.7%
Fonderie SimeRondo 5Non-CondensingOil84.9%
Fonderie SimeRondo 6Non-CondensingOil85.0%
Fonderie SimeRondo 7Non-CondensingOil85.2%
Fonderie SimeRX 37 CE ionoNon-CondensingGas78.9%
Fonderie SimeRX 37 CE IONONon-CondensingLPG80.7%
Fonderie SimeRX 48 CE ionoNon-CondensingGas79.9%
Fonderie SimeRX 48 CE IONONon-CondensingLPG81.8%
Fonderie SimeRX 55 CE ionoNon-CondensingGas79.9%
Fonderie SimeRX 55 CE IONONon-CondensingLPG81.8%
Fonderie SimeSuper 105 MK IINon-CondensingGas78.6%
Fonderie SimeSuper 105 MK IINon-CondensingLPG80.4%
Fonderie SimeSuper 90 MK IINon-CondensingLPG81.1%
Fonderie SimeSuper 90 MK.IINon-CondensingGas79.3%
Fonderie SimeSuperior 40 CiNon-CondensingGas79.0%
Fonderie SimeSuperior 40 Ci EINon-CondensingGas79.0%
Fonderie SimeSuperior 40 MK.IINon-CondensingGas76.1%
Fonderie SimeSuperior 50 CiNon-CondensingGas79.9%
Fonderie SimeSuperior 50 Ci EINon-CondensingGas79.9%
Fonderie SimeSuperior 50 MK.IINon-CondensingGas76.3%
Fonderie SimeSuperior 60 CiNon-CondensingGas79.4%
Fonderie SimeSuperior 60 Ci EINon-CondensingGas79.4%
Fonderie SimeSuperior 60 MK.IINon-CondensingGas75.7%
Fonderie SimeSuperior 75 MK.IINon-CondensingGas76.5%
Fonderie SimeSuperior 80 CiNon-CondensingGas78.6%
Fonderie SimeSuperior 80 Ci EINon-CondensingGas78.6%
Fonderie SimeSuperior 90 MK.IINon-CondensingGas76.8%

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.