Boulter - 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.

Boulter Boilers

ModelTypeFuelEfficiency
BoulterBonus65/95Non-CondensingOil84.6%
BoulterBonus40/65Non-CondensingOil85.7%
BoulterBonus65/90ANon-CondensingOil85.1%
BoulterBonusCombi 90ANon-CondensingOil82.2%
BoulterBuderus800-29T25/VCondensingGas90.5%
BoulterBuderus800-29T25/HCondensingGas90.5%
BoulterBuderus800-24T25/VCondensingGas90.4%
BoulterBuderus800-24T25/HCondensingGas90.4%
BoulterBuderus600/19SCondensingGas90.3%
BoulterBuderus600/11SCondensingGas90.3%
BoulterBuderus600/24SCondensingGas90.2%
BoulterBuderus600/24CCondensingGas90.1%
BoulterBuderus600-11SPCondensingLPG92.4%
BoulterBuderus600-19SPCondensingLPG92.2%
BoulterBuderus600-24CPCondensingLPG92.0%
BoulterBuderus600-24SPCondensingLPG92.0%
BoulterBuderus800/60CondensingGas90.2%
BoulterBuderus600/11RCondensingGas90.3%
BoulterBuderus800/43CondensingGas90.3%
BoulterBuderus600/19RCondensingGas90.3%
BoulterBuderus600/24RCondensingGas90.2%
BoulterBuderus500 - 24SCondensingGas90.1%
BoulterBuderus800/29CondensingGas90.1%
BoulterBuderus500-24/CCondensingGas90.0%
BoulterBuderus500-28CCondensingGas90.0%
BoulterBuderus800/24CondensingGas90.0%
BoulterBuderus600-11RPCondensingLPG92.3%
BoulterBuderus500-24SPCondensingLPG92.2%
BoulterBuderus600-19RPCondensingLPG92.2%
BoulterBuderus500-28CPCondensingLPG92.1%
BoulterBuderus500-24/CPCondensingLPG92.1%
BoulterBuderus600-24RPCondensingLPG92.0%
BoulterBuderus800-43PCondensingLPG91.3%
BoulterBuderus800-29PCondensingLPG91.2%
BoulterBuderus800-24PCondensingLPG91.1%
BoulterCamray15/19 ExternalNon-CondensingOil81.6%
BoulterCamrayCombi plusNon-CondensingOil78.5%
BoulterCamray15/21 InternalNon-CondensingOil70%
BoulterCamray15/21 ExternalNon-CondensingOil70%
BoulterCamray 3135/175Non-CondensingOil85.3%
BoulterCamray 390/130 FNon-CondensingOil70%
BoulterCamray 340/50Non-CondensingOil70%
BoulterCamray 3135/175 BNon-CondensingOil70%
BoulterCamray 3135/175 FNon-CondensingOil70%
BoulterCamray 390/130 BNon-CondensingOil70%
BoulterCamray 350/70Non-CondensingOil70%
BoulterCamray 5100/130Non-CondensingOil81.2%
BoulterCamray 565/95Non-CondensingOil84.6%
BoulterCamray 5150/200Non-CondensingOil84.5%
BoulterCamray 5CombiNon-CondensingOil81.8%
BoulterCamray 5100/140Non-CondensingOil81.2%
BoulterCamray 5100/140 UtilityNon-CondensingOil81.2%
BoulterCamray 5100/140 SystemNon-CondensingOil81.2%
BoulterCamray 5150/200GNon-CondensingOil85.7%
BoulterCamray 595/130A SystemNon-CondensingOil85.6%
BoulterCamray 540/65Non-CondensingOil85.7%
BoulterCamray 5U 40/65 SNon-CondensingOil85.7%
BoulterCamray 540/65 EXNon-CondensingOil85.7%
BoulterCamray 5U 95 / 130 SANon-CondensingOil85.6%
BoulterCamray 595/130ANon-CondensingOil85.6%
BoulterCamray 595/130A UtilityNon-CondensingOil85.6%
BoulterCamray 5150/200KNon-CondensingOil85.3%
BoulterCamray 565/90 EXNon-CondensingOil85.2%
BoulterCamray 565/90ANon-CondensingOil85.1%
BoulterCamray 565/90A UtilityNon-CondensingOil85.1%
BoulterCamray 565/90A SystemNon-CondensingOil85.1%
BoulterCamray 5200/240Non-CondensingOil85.1%
BoulterCamray 5U 65/90 SBNon-CondensingOil85%
BoulterCamray 5Combi 55Non-CondensingOil82.9%
BoulterCamray 5Combi 90BENon-CondensingOil82.4%
BoulterCamray 5Combi 90ANon-CondensingOil82.3%
BoulterCamray 5Combi 70ANon-CondensingOil82.3%
BoulterCamray 5 System100/130 SystemNon-CondensingOil81.2%
BoulterCamray 5 System65/95 SystemNon-CondensingOil84.6%
BoulterCamray 5 System40/65 SystemNon-CondensingOil85.7%
BoulterCamray 5 Utility100/130 UtilityNon-CondensingOil81.2%
BoulterCamray 5 Utility65/95 UtilityNon-CondensingOil84.6%
BoulterCamray 5 Utility40/65 UtilityNon-CondensingOil85.7%
BoulterCamray 5 Wall Hung50/70 ExternalNon-CondensingOil85.5%
BoulterCamray 5 Wall Hung50/70 InternalNon-CondensingOil85.5%
BoulterCamray Combi90/130 BNon-CondensingOil70%
BoulterCamray Combi90/130 FNon-CondensingOil70%
BoulterCamray Compact50/70 FNon-CondensingOil70%
BoulterCamray Compact50/70 BNon-CondensingOil70%
BoulterCamray Quartet90/110 FNon-CondensingOil70%
BoulterCamray Quartet60/80 BNon-CondensingOil70%
BoulterCamray Quartet110/150 BNon-CondensingOil70%
BoulterCamray Quartet90/110 BNon-CondensingOil70%
BoulterCamray Quartet60/80 FNon-CondensingOil70%
BoulterCamray Quartet40/60 FNon-CondensingOil70%
BoulterCamray Quartet40/60 BNon-CondensingOil70%
BoulterCamray Quartet110/150 FNon-CondensingOil70%
BoulterCamray Utility90/110 BNon-CondensingOil70%
BoulterCamray Utility110/150 FNon-CondensingOil70%
BoulterCamray Utility110/150 BNon-CondensingOil70%
BoulterCamray Utility90/110 FNon-CondensingOil70%
BoulterCamray Utility60/80 BNon-CondensingOil70%
BoulterCamray Utility60/80 FNon-CondensingOil70%
BoulterCamray Utility40/60 FNon-CondensingOil70%
BoulterCamray Utility40/60 BNon-CondensingOil70%
BoulterCenturion3.5Non-CondensingGas77.0%
BoulterCenturion2.5Non-CondensingGas76.6%
BoulterClassic70/90Non-CondensingOil81.4%
BoulterClassic50/70Non-CondensingOil80.6%
BoulterClassic95/130Non-CondensingOil85.6%
BoulterClassic95/130 SystemNon-CondensingOil85.6%
BoulterClassic50/70 ANon-CondensingOil85.5%
BoulterClassic50/70 A SystemNon-CondensingOil85.5%
BoulterClassic135/165ANon-CondensingOil85.3%
BoulterClassic70/90ANon-CondensingOil85.1%
BoulterClassic70/90A SystemNon-CondensingOil85.1%
BoulterClassic135/165Non-CondensingOil84.3%
BoulterCompact50/70Non-CondensingOil82.7%
BoulterEco-System12/19Non-CondensingOil85.7%
BoulterEco-System19/26Non-CondensingOil85.0%
BoulterEconomy50/70Non-CondensingOil70%
BoulterEconomy70/90Non-CondensingOil70%
BoulterEconomy90Non-CondensingOil70%
BoulterEconomy130Non-CondensingOil70%
BoulterPathfinderC2/6A (Kerosene)Non-CondensingOil85.4%
BoulterPathfinderC2/10A (Gas Oil)Non-CondensingOil85.4%
BoulterPathfinderC2/9A (Gas Oil)Non-CondensingOil85.3%
BoulterPathfinderC2/9A (Kerosene)Non-CondensingOil85.3%
BoulterPathfinderC2/8A (Kerosene)Non-CondensingOil85.3%
BoulterPathfinderC2/10A (Kerosene)Non-CondensingOil85.3%
BoulterPathfinderC2/7A (Kerosene)Non-CondensingOil85.3%
BoulterPathfinderC2/8A (Gas Oil)Non-CondensingOil85.2%
BoulterPathfinderC2/6A (Gas Oil)Non-CondensingOil85.1%
BoulterPathfinderC2/7A (Gas Oil)Non-CondensingOil85.1%
BoulterPathfinder GA60kWNon-CondensingGas79.6%
BoulterPathfinder GA48 kWNon-CondensingGas79.6%
BoulterPathfinder GA70kWNon-CondensingGas79.5%
BoulterPathfinder GA36 kWNon-CondensingGas79.3%

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
F70-74%£220£145£125
G<70%£320£210£180

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.