Ideal - 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.

Ideal Boilers

ModelTypeFuelEfficiency
IdealBuccaneerGTE5/OILNon-CondensingOil85.7%
IdealBuccaneerGTE6/OILNon-CondensingOil85.7%
IdealBuccaneerGTE4/OILNon-CondensingOil85.7%
IdealC95FFNon-CondensingGas78.5%
IdealC80FFNon-CondensingGas78.4%
IdealClassicRS 350Non-CondensingGas79.9%
IdealClassicFF 350Non-CondensingGas79.6%
IdealClassicFF 330Non-CondensingGas79.4%
IdealClassicRS 360Non-CondensingGas79.0%
IdealClassicRS 340Non-CondensingGas78.9%
IdealClassicFF 340Non-CondensingGas78.6%
IdealClassicFF 370Non-CondensingGas78.5%
IdealClassicRS 330Non-CondensingGas78.3%
IdealClassicFF 360Non-CondensingGas78.3%
IdealClassicFF 380Non-CondensingGas78.1%
IdealClassicFF 3100Non-CondensingGas78.0%
IdealClassicHE 18CondensingGas87.5%
IdealClassicHE 12CondensingGas87.4%
IdealClassicHE 9CondensingGas87.1%
IdealClassicHE 15CondensingGas86.4%
IdealClassicSE15 RSNon-CondensingGas79.9%
IdealClassicSE15 FF SilverNon-CondensingGas79.6%
IdealClassicSE15 FFNon-CondensingGas79.6%
IdealClassicSE9 FFNon-CondensingGas79.4%
IdealClassicSE9 FF SilverNon-CondensingGas79.4%
IdealClassicFF 360 LFNon-CondensingGas79.1%
IdealClassicFF 340 LFNon-CondensingGas79.1%
IdealClassicSE18 RSNon-CondensingGas79.0%
IdealClassicSE12 RSNon-CondensingGas78.9%
IdealClassicSE12 FFNon-CondensingGas78.6%
IdealClassicSE12 FF SilverNon-CondensingGas78.6%
IdealClassicSE21 FFNon-CondensingGas78.5%
IdealClassicSE21 FF SilverNon-CondensingGas78.5%
IdealClassicFF 350 LFNon-CondensingGas78.4%
IdealClassicSE18 FF SilverNon-CondensingGas78.3%
IdealClassicSE9 RSNon-CondensingGas78.3%
IdealClassicSE18 FFNon-CondensingGas78.3%
IdealClassicSE24 FFNon-CondensingGas78.1%
IdealClassicSE24 FF SilverNon-CondensingGas78.1%
IdealClassicSE30 FF SilverNon-CondensingGas78.0%
IdealClassicSE30 FFNon-CondensingGas78.0%
IdealClassicFF270Non-CondensingGas77.2%
IdealClassicLX FF270Non-CondensingGas77.2%
IdealClassicLX FF230Non-CondensingGas77.2%
IdealClassicFF230Non-CondensingGas77.2%
IdealClassicLX FF260Non-CondensingGas76.9%
IdealClassicFF260Non-CondensingGas76.9%
IdealClassicFF250Non-CondensingGas76.7%
IdealClassicFF2100Non-CondensingGas76.7%
IdealClassicLX FF250Non-CondensingGas76.7%
IdealClassicLX FF280Non-CondensingGas76.5%
IdealClassicLX FF240Non-CondensingGas76.2%
IdealClassicFF240Non-CondensingGas76.2%
IdealClassicFF280Non-CondensingGas76.1%
IdealClassicRS 240Non-CondensingGas73.2%
IdealClassicLX RS240Non-CondensingGas73.2%
IdealClassicRS 250Non-CondensingGas72.3%
IdealClassicRS 260Non-CondensingGas72.3%
IdealClassicLX RS250Non-CondensingGas72.3%
IdealClassicLX RS260Non-CondensingGas72.3%
IdealClassicLX RS230Non-CondensingGas71.2%
IdealClassicRS 230Non-CondensingGas71.2%
IdealClassicHE 15 PCondensingLPG89.0%
IdealClassicHE 18 PCondensingLPG87.7%
IdealClassicFF 350 PNon-CondensingLPG81.8%
IdealClassicFF250PNon-CondensingLPG81.7%
IdealClassicLX FF250PNon-CondensingLPG81.7%
IdealClassicFF 360 PNon-CondensingLPG80.2%
IdealClassicFF 380 PNon-CondensingLPG79.9%
IdealClassicLX FF260PNon-CondensingLPG78.5%
IdealClassicFF260PNon-CondensingLPG78.5%
IdealClassicLX FF275PNon-CondensingLPG77.4%
IdealClassicFF275PNon-CondensingLPG77.4%
IdealClassicLX RS245PNon-CondensingLPG73.9%
IdealClassicRS 245PNon-CondensingLPG73.9%
IdealClassicRS 255PNon-CondensingLPG72.8%
IdealClassicLX RS255PNon-CondensingLPG72.8%
IdealClassic SlimlineFF 350Non-CondensingGas79.9%
IdealClassic SlimlineFF 330Non-CondensingGas79.9%
IdealClassic SlimlineFF 360Non-CondensingGas79.7%
IdealClassic SlimlineFF 340Non-CondensingGas79.2%
IdealClassic SlimlineSE9 FFNon-CondensingGas79.9%
IdealClassic SlimlineSE15 FFNon-CondensingGas79.9%
IdealClassic SlimlineSE18 FFNon-CondensingGas79.7%
IdealClassic SlimlineSE12 FFNon-CondensingGas79.2%
IdealConcordCXD60Non-CondensingGas77.7%
IdealConcordCXD50Non-CondensingGas76.2%
IdealConcordCXD40Non-CondensingGas76.2%
IdealConcordCXS60Non-CondensingGas77.7%
IdealConcordCXSD60Non-CondensingGas77.7%
IdealConcordCXA60Non-CondensingGas77.5%
IdealConcordCXA50Non-CondensingGas76.4%
IdealConcordCXSD50Non-CondensingGas76.2%
IdealConcordCXS50Non-CondensingGas76.2%
IdealConcordCXSD40Non-CondensingGas76.2%
IdealConcordCXS40Non-CondensingGas76.2%
IdealConcordCXA40Non-CondensingGas76%
IdealConcordCXC48CondensingGas85.8%
IdealConcordCXC70CondensingGas85.5%
IdealConcordCX60Non-CondensingGas73.5%
IdealConcordCX50Non-CondensingGas72.4%
IdealConcordCX40Non-CondensingGas72.0%
IdealConcord CXA40/HNon-CondensingGas79.9%
IdealConcord CXA50/HNon-CondensingGas79.9%
IdealConcord CXA60/HNon-CondensingGas79.8%
IdealConcord CXS40/HNon-CondensingGas80.4%
IdealConcord CXS60/HNon-CondensingGas80.3%
IdealConcord CXS50/HNon-CondensingGas80.1%
IdealConcord CXSD40/HNon-CondensingGas80.4%
IdealConcord CXSD60/HNon-CondensingGas80.3%
IdealConcord CXSD50/HNon-CondensingGas80.1%
IdealEliseH15CondensingGas90.4%
IdealEliseH24CondensingGas90.2%
IdealEspritHE 24CondensingGas90.2%
IdealEspritHE 35CondensingGas90.2%
IdealEspritHE 30CondensingGas90.2%
IdealEsprit 235CondensingGas90.1%
IdealEsprit 230CondensingGas90.1%
IdealEsprit 224CondensingGas90.1%
IdealEsprit Eco30CondensingGas91.1%
IdealEsprit Eco24CondensingGas91.0%
IdealEvomax60CondensingGas91.1%
IdealEvomax40CondensingGas91.0%
IdealEvomax30CondensingGas91.0%
IdealEvomax30PCondensingLPG93.1%
IdealEvomax60PCondensingLPG92.9%
IdealEvomax40PCondensingLPG92.7%
IdealexcelHE C24CondensingGas86.4%
IdealexcelHE C28CondensingGas86.4%
IdealexcelHE C32CondensingGas86.3%
Idealicosm3080CondensingGas90.2%
IdealIcosHE36CondensingGas90.7%
IdealIcosHE30CondensingGas90.7%
IdealicosHE15CondensingGas90.4%
IdealIcosHE 12CondensingGas90.3%
IdealicosHE18CondensingGas90.3%
IdealicosHE24CondensingGas90.2%
Idealicos systemm3080CondensingGas90.2%
Idealicos SystemHE 15CondensingGas90.4%
Idealicos SystemHE 24CondensingGas90.2%
IdealImaxW45CondensingGas90.4%
IdealImaxW60CondensingGas90.4%
IdealImaxW60PCondensingLPG92.1%
IdealImaxW45PCondensingLPG91.3%
IdealIndependentC30CondensingGas91.1%
IdealIndependentC24CondensingGas91.0%
IdealIndependentC35CondensingGas91.0%
IdealIndependent +C30CondensingGas91.1%
IdealIndependent +C24CondensingGas91.0%
IdealIndependent +C35CondensingGas91.0%
IdealIndependent System30CondensingGas91.1%
IdealIndependent System15CondensingGas91.1%
IdealIndependent System24CondensingGas91.0%
IdealIndependent System18CondensingGas91.0%
Idealisarm30100CondensingGas90.1%
IdealisarHE30CondensingGas90.1%
IdealisarHE24CondensingGas90.1%
IdealisarHE35CondensingGas90.1%
IdealIsar HE 30HE30CondensingGas90.1%
IdealistorHE325CondensingGas90.9%
IdealistorHE260CondensingGas90.7%
IdealLogic + Heat12CondensingGas91.2%
IdealLogic + Heat15CondensingGas91.1%
IdealLogic + Heat30CondensingGas91.1%
IdealLogic + Heat18CondensingGas91.0%
IdealLogic + Heat24CondensingGas91.0%
IdealLogic + System15CondensingGas91.1%
IdealLogic + System30CondensingGas91.1%
IdealLogic + System24CondensingGas91.0%
IdealLogic + System18CondensingGas91.0%
IdealLogic Code Combi33CondensingGas91.1%
IdealLogic Code Combi38CondensingGas91.0%
IdealLogic Code Combi26CondensingGas91.0%
IdealLogic combi30CondensingGas91.1%
IdealLogic combi35CondensingGas91.0%
IdealLogic combi24CondensingGas91.0%
IdealLogic Combi E30CondensingGas91.1%
IdealLogic Combi E24CondensingGas91.0%
IdealLogic Combi E35CondensingGas91.0%
IdealLogic Combi EC30CondensingGas91.1%
IdealLogic Combi EC24CondensingGas91.0%
IdealLogic Combi EC35CondensingGas91.0%
IdealLogic Combi ES30CondensingGas91.1%
IdealLogic Combi ES35CondensingGas91.0%
IdealLogic Combi ES24CondensingGas91.0%
IdealLogic Heat12CondensingGas91.2%
IdealLogic Heat30CondensingGas91.1%
IdealLogic Heat15CondensingGas91.1%
IdealLogic Heat18CondensingGas91.0%
IdealLogic Heat24CondensingGas91.0%
IdealLogic System30CondensingGas91.1%
IdealLogic System15CondensingGas91.1%
IdealLogic System18CondensingGas91.0%
IdealLogic System24CondensingGas91.0%
IdealLogic+ combi30CondensingGas91.1%
IdealLogic+ combi24CondensingGas91.0%
IdealLogic+ combi35CondensingGas91.0%
IdealMaximiserSE 42CondensingGas90.4%
IdealMaximiserSE 65CondensingGas90.2%
IdealMexicoHE 36CondensingGas90.7%
IdealMexicoHE 30CondensingGas90.4%
IdealMexicoHE15CondensingGas90.4%
IdealMexicoHE18CondensingGas90.3%
IdealMexicoHE 24CondensingGas90.2%
IdealMexico SlimlineCF 440Non-CondensingGas78.5%
IdealMexico SlimlineRS 445Non-CondensingGas78.4%
IdealMexico SlimlineRS3/40Non-CondensingGas74.6%
IdealMexico SlimlineRS3/50Non-CondensingGas72.9%
IdealMexico SlimlineCF3/50Non-CondensingGas71.6%
IdealMexico SlimlineCF3/40Non-CondensingGas70.8%
IdealMexico Super470 FFNon-CondensingGas79.9%
IdealMexico SuperCF 465Non-CondensingGas79.7%
IdealMexico Super480 FFNon-CondensingGas79.7%
IdealMexico Super80FFNon-CondensingGas79.4%
IdealMexico SuperRS 4125Non-CondensingGas79.4%
IdealMexico Super460 FFNon-CondensingGas79.2%
IdealMexico SuperRS 450Non-CondensingGas79.1%
IdealMexico SuperRS 485Non-CondensingGas79.1%
IdealMexico Super450 FFNon-CondensingGas79.0%
IdealMexico SuperCF 4120Non-CondensingGas79.0%
IdealMexico SuperRS 4100Non-CondensingGas79.0%
IdealMexico SuperRS 460Non-CondensingGas79.0%
IdealMexico SuperRS 470Non-CondensingGas79.0%
IdealMexico Super4100 FFNon-CondensingGas78.9%
IdealMexico SuperCF 475Non-CondensingGas78.9%
IdealMexico SuperCF 495Non-CondensingGas78.8%
IdealMexico SuperRS 440Non-CondensingGas78.6%
IdealMexico SuperCF 4140Non-CondensingGas78.6%
IdealMexico SuperCF 455Non-CondensingGas78.5%
IdealMexico Super4125 FFNon-CondensingGas78.5%
IdealMexico SuperCF 445Non-CondensingGas78.5%
IdealMexico Super440 FFNon-CondensingGas78.3%
IdealMexico Super125FFNon-CondensingGas77.9%
IdealMexico Super100FFNon-CondensingGas77.6%
IdealMexico Super70FFNon-CondensingGas77.6%
IdealMexico Super60FFNon-CondensingGas77.1%
IdealMexico Super50FFNon-CondensingGas76.7%
IdealMexico Super40FFNon-CondensingGas76.7%
IdealMexico SuperRS3/60Non-CondensingGas74%
IdealMexico SuperRS3/40Non-CondensingGas72.8%
IdealMexico SuperCF3/140Non-CondensingGas72.7%
IdealMexico SuperCF3/70Non-CondensingGas72.7%
IdealMexico SuperRS3/70Non-CondensingGas72.7%
IdealMexico SuperRS3/125Non-CondensingGas72.7%
IdealMexico SuperRS3/100Non-CondensingGas72.5%
IdealMexico SuperCF3/80Non-CondensingGas72.3%
IdealMexico SuperRS3/50Non-CondensingGas72.1%
IdealMexico SuperRS3/80Non-CondensingGas72.0%
IdealMexico SuperCF3/60Non-CondensingGas71.8%
IdealMexico SuperCF3/40Non-CondensingGas71.8%
IdealMexico SuperCF3/125Non-CondensingGas71.8%
IdealMexico SuperCF3/100Non-CondensingGas71.6%
IdealMexico SuperCF3/50Non-CondensingGas71.3%
IdealMexico SuperRS3/75PNon-CondensingLPG75.3%
IdealMexico SuperRS3/60PNon-CondensingLPG75.2%
IdealMexico SuperCF3/140PNon-CondensingLPG74.8%
IdealMexico SuperRS3/100PNon-CondensingLPG74.7%
IdealMexico SuperCF3/125PNon-CondensingLPG74.5%
IdealMexico SuperCF3/60PNon-CondensingLPG74.4%
IdealMexico SuperCF3/75PNon-CondensingLPG74.0%
IdealMexico SuperCF3/100PNon-CondensingLPG73.8%
IdealminiHE C24CondensingGas87.7%
IdealminiHE C28CondensingGas87.6%
IdealMiniHE C32CondensingGas86.8%
IdealminiHE C32CondensingLPG88.8%
IdealminiHE C28 LPGCondensingLPG87.1%
IdealminiHE C24 LPGCondensingLPG87%
IdealMini C2424kW Combi BoilerNon-CondensingGas78.2%
IdealMini C2828kW Combi BoilerNon-CondensingGas78.3%
IdealMini C3232kW Combi BoilerNon-CondensingGas78.3%
IdealMini S2424kW System BoilerNon-CondensingGas78.3%
IdealMini S2828kW System BoilerNon-CondensingGas78.4%
IdealMinimserSE40CondensingGas86.7%
IdealMinimserSE70CondensingGas86.5%
IdealMinimserSE50CondensingGas86.4%
IdealMinimserSE60CondensingGas86.3%
IdealMinimserSE80CondensingGas86.3%
IdealMinimserSE30CondensingGas86.1%
IdealResponseSECondensingGas88.3%
IdealResponse100Non-CondensingGas79.4%
IdealResponse80Non-CondensingGas79.3%
IdealResponse120Non-CondensingGas79.4%
IdealSystemiserSECondensingGas88.4%
IdealVogues18CondensingGas91.1%
IdealVogues32CondensingGas91.1%
IdealVoguec32CondensingGas91.1%
IdealVogues26CondensingGas91.1%
IdealVogues15CondensingGas91.0%
IdealVoguec26CondensingGas91.0%
IdealVoguec40CondensingGas91.0%

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.

Ideal has a reputation for high quality products and have a range of products designed with the installer and homeowner in mind. The company has been making domestic boilers since 1905.

There are 13 Ideal domestic boilers to choose from, many of which are SEDBUK Band ‘A’ rated for efficiency. Ideal boilers are manufactured at their HQ in Hull, where they go through over 200 quality checks to ensure each model is of high quality.

In 2014, the Ideal Logic+ range won a prestigious Product of the Year Award within the Household Boiler category. The Logic+ is the first boiler in the UK to win this prestigious award.

What are the main boiler types from Ideal?

Ideal has two main boiler ranges; the Ideal Classic range and the Ideal Mexico range.

The Ideal Classic Range

Ideal has continued to expand and adapt its Classic range for almost twenty years. The original Ideal Classic was first launched in 1991. Then came the Classic SE in 2001, an upgrade of the original design. The Classic SE has a reputation for reliability thanks to its simple design and engineering.

Since 2005 SE boilers have been replaced by HE models such as the Ideal Classic HE 15 Regular. The Ideal Classic HE range is SEDBUK band B rated and is easy to install and service.

The Ideal Mexico Range

The Mexico HE is a range from Ideal’s Heat Only collection, which includes Logic + Heat and Imax W. The Mexico range of Heat Only boilers are SEDBUK Band A rated and floor standing. Beneficial features include frost protection, so your boiler will run in harsh weather, low NOx levels for low emissions, a range of flue options, and a compact design.

How much do Ideal boilers cost?

Ideal combi boilers cost between around £680 and £4800 (excluding installation costs). A regular boiler from Ideal could cost between £690 and £4420, whilst a system boiler may be between £715 and £1120 (excluding installation costs).