Heating World Group - 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.

Heating World Group Boilers

ModelTypeFuelEfficiency
Heating World GroupBeta15/17 WMNon-CondensingOil70%
Heating World GroupBeta15/19Non-CondensingOil70%
Heating World GroupBeta42339Non-CondensingOil70%
Heating World GroupFlamevectorSHFS 18/21 BFNon-CondensingOil83.6%
Heating World GroupFlamevectorSHFS 18/21 CFNon-CondensingOil83.6%
Heating World GroupFlamevectorSHI 18/21 BFNon-CondensingOil83.6%
Heating World GroupFlamevectorSHI 18/21 CFNon-CondensingOil83.6%
Heating World GroupFlamevector SHFS 12/18 BFNon-CondensingOil85.7%
Heating World GroupFlamevector SHFS 12/18 CFNon-CondensingOil85.7%
Heating World GroupFlamevector SHI 12/18 BFNon-CondensingOil85.7%
Heating World GroupFlamevector SHI 12/18 CFNon-CondensingOil85.7%
Heating World GroupGrandee8S 35/40 BFNon-CondensingOil85.6%
Heating World GroupGrandee8.150Non-CondensingOil85.6%
Heating World GroupGrandee8.135 BFNon-CondensingOil85.6%
Heating World GroupGrandee8.135Non-CondensingOil85.6%
Heating World GroupGrandee8.120 BFNon-CondensingOil85.6%
Heating World GroupGrandee6.80Non-CondensingOil85.6%
Heating World GroupGrandee7.90Non-CondensingOil85.6%
Heating World GroupGrandee6.80 BFNon-CondensingOil85.6%
Heating World GroupGrandee9S 40/50 CFNon-CondensingOil85.6%
Heating World GroupGrandee8S 35/40 CFNon-CondensingOil85.6%
Heating World GroupGrandee6S 15/23 CFNon-CondensingOil85.6%
Heating World GroupGrandee8.120Non-CondensingOil85.6%
Heating World GroupGrandee7.110Non-CondensingOil85.6%
Heating World GroupGrandee6.70 BFNon-CondensingOil85.6%
Heating World GroupGrandee6.70Non-CondensingOil85.6%
Heating World GroupGrandee6.60Non-CondensingOil85.6%
Heating World GroupGrandee9S 40/50 BFNon-CondensingOil85.6%
Heating World GroupGrandee6.60 BFNon-CondensingOil85.6%
Heating World GroupGrandee7.110 BFNon-CondensingOil85.6%
Heating World GroupGrandee6S 15/23 BFNon-CondensingOil85.6%
Heating World GroupGrandee7.100 BFNon-CondensingOil85.6%
Heating World GroupGrandee7S 26/32 BFNon-CondensingOil85.6%
Heating World GroupGrandee7S 26/32 CFNon-CondensingOil85.6%
Heating World GroupGrandee7.90 BFNon-CondensingOil85.6%
Heating World GroupGrandee8.150 BFNon-CondensingOil85.6%
Heating World GroupGrandee7.100Non-CondensingOil85.6%
Heating World GroupGrandee4.40Non-CondensingOil84.7%
Heating World GroupGrandee5.40 BFNon-CondensingOil84.7%
Heating World GroupGrandee5.40Non-CondensingOil84.7%
Heating World GroupGrandee4.40 BFNon-CondensingOil84.7%
Heating World GroupGrandee1.40Non-CondensingOil84.7%
Heating World GroupGrandee2.70Non-CondensingOil84.0%
Heating World GroupGrandee3.100Non-CondensingOil84.0%
Heating World GroupGrandee3.90Non-CondensingOil84.0%
Heating World GroupGrandee2.80Non-CondensingOil84.0%
Heating World GroupGrandee1.50Non-CondensingOil83.6%
Heating World GroupGrandee1.60Non-CondensingOil83.6%
Heating World GroupGrandee4.60Non-CondensingOil83.6%
Heating World GroupGrandee4.50Non-CondensingOil83.6%
Heating World GroupGrandee5.60 BFNon-CondensingOil83.6%
Heating World GroupGrandee5.60Non-CondensingOil83.6%
Heating World GroupGrandee5.50 BFNon-CondensingOil83.6%
Heating World GroupGrandee4.60 BFNon-CondensingOil83.6%
Heating World GroupGrandee5.50Non-CondensingOil83.6%
Heating World GroupGrandee4.50 BFNon-CondensingOil83.6%
Heating World GroupGrandee 1S 12/18 BFNon-CondensingOil85.7%
Heating World GroupGrandee 1S 12/18 BF EXTNon-CondensingOil85.7%
Heating World GroupGrandee 1S 12/18 CFNon-CondensingOil85.7%
Heating World GroupGrandee 2S 18/22 BFNon-CondensingOil85.7%
Heating World GroupGrandee 2S 18/22 BF EXTNon-CondensingOil85.7%
Heating World GroupGrandee 2S 18/22 CFNon-CondensingOil85.7%
Heating World GroupGrandee 3S 22/27 BFNon-CondensingOil85.7%
Heating World GroupGrandee 3S 22/27 BF EXTNon-CondensingOil85.7%
Heating World GroupGrandee 3S 22/27 CFNon-CondensingOil85.7%
Heating World GroupGrandee 5S 12/18 BFNon-CondensingOil85.7%
Heating World GroupGrandee 5S 12/18 CFNon-CondensingOil85.7%
Heating World GroupGrandee Combi CompactSFS 15/20 BFNon-CondensingOil82.6%
Heating World GroupGrandee Combi CompactSFS 15-20 CFNon-CondensingOil82.6%
Heating World GroupGrandee Combi CondensingW 15/22CondensingOil89.1%
Heating World GroupGrandee Combi CondensingFS 15/23CondensingOil89.1%
Heating World GroupGrandee Combi CondensingFS 23/30CondensingOil88.6%
Heating World GroupGrandee Combi CondensingW 23/28CondensingOil88.6%
Heating World GroupGrandee Combi Condensing ExternalFS 15/23CondensingOil89.1%
Heating World GroupGrandee Combi Condensing ExternalW 15/22CondensingOil89.1%
Heating World GroupGrandee Combi Condensing ExternalW 23/28CondensingOil88.6%
Heating World GroupGrandee Combi Condensing ExternalFS 23/30CondensingOil88.6%
Heating World GroupGrandee Combi Floor15-20 BFNon-CondensingOil82.6%
Heating World GroupGrandee Combi Floor15-20Non-CondensingOil82.6%
Heating World GroupGrandee Combi SFS 15/20 BFNon-CondensingOil82.6%
Heating World GroupGrandee Combi SFS 15/20 CFNon-CondensingOil82.6%
Heating World GroupGrandee Combi SFS 20/25 BFNon-CondensingOil82.9%
Heating World GroupGrandee Combi SFS 20/25 CFNon-CondensingOil82.9%
Heating World GroupGrandee Combi SFS 25/29 BFNon-CondensingOil82.9%
Heating World GroupGrandee Combi SFS 25/29 CFNon-CondensingOil82.9%
Heating World GroupGrandee Combi SW 15/20 BFNon-CondensingOil82.8%
Heating World GroupGrandee Combi SW 15/20 CFNon-CondensingOil82.8%
Heating World GroupGrandee Combi SW 20/24 BFNon-CondensingOil82.9%
Heating World GroupGrandee Combi SW 20/24 CFNon-CondensingOil82.9%
Heating World GroupGrandee Combi SW 24/27 BFNon-CondensingOil82.9%
Heating World GroupGrandee Combi SW 24/27 CFNon-CondensingOil82.9%
Heating World GroupGrandee Standard CondensingW 15/22CondensingOil91.9%
Heating World GroupGrandee Standard CondensingFS 15/23CondensingOil91.9%
Heating World GroupGrandee Standard CondensingFS 23/30CondensingOil91.4%
Heating World GroupGrandee Standard CondensingW 23/28CondensingOil91.4%
Heating World GroupGrandee Standard Condensing ExternalW 15/22CondensingOil91.9%
Heating World GroupGrandee Standard Condensing ExternalFS 15/23CondensingOil91.9%
Heating World GroupGrandee Standard Condensing ExternalFS 23/30CondensingOil91.4%
Heating World GroupGrandee Standard Condensing ExternalW 23/28CondensingOil91.4%
Heating World GroupGrandee System CondensingW 15/22CondensingOil91.9%
Heating World GroupGrandee System CondensingFS 15/23CondensingOil91.9%
Heating World GroupGrandee System CondensingFS 23/30CondensingOil91.4%
Heating World GroupGrandee System CondensingW 23/28CondensingOil91.4%
Heating World GroupGrandee System Condensing ExternalW 15/22CondensingOil91.9%
Heating World GroupGrandee System Condensing ExternalFS 15/23CondensingOil91.9%
Heating World GroupGrandee System Condensing ExternalW 23/28CondensingOil91.4%
Heating World GroupGrandee System Condensing ExternalFS 23/30CondensingOil91.4%
Heating World GroupSorrento12/15Non-CondensingOil84.7%
Heating World GroupSorrentoSHI 18/21 CFNon-CondensingOil83.6%
Heating World GroupSorrentoSFS 18/21 BFNon-CondensingOil83.6%
Heating World GroupSorrentoSHI 18/21 BFNon-CondensingOil83.6%
Heating World GroupSorrento15/18Non-CondensingOil83.6%
Heating World GroupSorrentoSFS 18/21 CFNon-CondensingOil83.6%
Heating World GroupSorrento18/21Non-CondensingOil83.6%
Heating World GroupSorrento SFS 12/18 BFNon-CondensingOil85.7%
Heating World GroupSorrento SFS 12/18 CFNon-CondensingOil85.7%
Heating World GroupSorrento SHI 12/18 BFNon-CondensingOil85.7%
Heating World GroupSorrento SHI 12/18 CFNon-CondensingOil85.7%

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.