Vaillant - 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.

Vaillant Boilers

VaillantEcomaxVU 226 EHCondensingGas89.3%
VaillantEcomaxVU 186 EHCondensingGas89.3%
VaillantEcomax828 ECondensingGas88.5%
VaillantEcomax824 ECondensingGas88.4%
VaillantEcomaxpro 28 ECondensingGas90.6%
VaillantEcomaxpro 18 ECondensingGas90.4%
VaillantEcomax635 ECondensingLPG92.6%
VaillantEcomax835/2 ECondensingLPG92.5%
VaillantecoTEC exclusive 832CondensingGas91.1%
VaillantecoTEC exclusive 832CondensingLPG92.2%
VaillantecoTEC exclusive 838CondensingGas91.1%
VaillantecoTEC exclusive 838CondensingLPG92.3%
VaillantEcotec Plus612CondensingGas91.2%
VaillantEcotec Plus624CondensingGas91.2%
VaillantEcotec Plus615CondensingGas91.2%
VaillantEcotec Plus618CondensingGas91.2%
VaillantEcotec Plus630CondensingGas91.2%
VaillantEcotec Plus824CondensingGas91.2%
VaillantEcotec Plus831CondensingGas91.1%
VaillantEcotec Plus618 LPGCondensingLPG92.4%
VaillantEcotec Plus630 LPGCondensingLPG92.4%
VaillantEcotec Plus831 LPGCondensingLPG92.3%
VaillantEcotec plus 415CondensingGas90.5%
VaillantEcotec plus 415CondensingLPG91.6%
VaillantEcotec plus 418CondensingGas90.5%
VaillantEcotec plus 418CondensingLPG91.8%
VaillantEcotec plus 428CondensingGas90.6%
VaillantEcotec plus 428CondensingLPG92.2%
VaillantEcotec plus 438CondensingGas90.8%
VaillantEcotec plus 438CondensingLPG92.4%
VaillantecoTEC plus 612VU GB 126/5-5CondensingGas90.6%
VaillantecoTEC plus 615VU GB 156/5-5CondensingGas90.9%
VaillantecoTEC plus 618VU GB 186/5-5CondensingGas90.9%
VaillantecoTEC plus 618VU GB 186/5-5CondensingLPG92.7%
VaillantecoTEC plus 624VU GB 246/5-5CondensingGas90.7%
VaillantecoTEC plus 630VU GB 306/5-5CondensingGas90.6%
VaillantecoTEC plus 630VU GB 306/5-5CondensingLPG92.5%
VaillantecoTEC plus 637CondensingGas91.2%
VaillantecoTEC plus 637VU GB 376/5-5CondensingGas90.6%
VaillantecoTEC plus 637CondensingLPG92.3%
VaillantecoTEC plus 824VUW GB 246/5-5CondensingGas90.5%
VaillantecoTEC plus 831VUW GB 316/5-5CondensingGas90.6%
VaillantecoTEC plus 831VUW GB 316/5-5CondensingLPG92.6%
VaillantecoTEC plus 837CondensingGas91.1%
VaillantecoTEC plus 837VUW GB 376/5-5CondensingGas90.6%
VaillantecoTEC plus 837CondensingLPG92.2%
VaillantecoTEC plus 937CondensingGas91.5%
VaillantecoTEC plus 937VUI GB 376/5-5CondensingGas90.6%
VaillantecoTEC plus 937CondensingLPG92.6%
VaillantEcotec Pro28CondensingGas91.1%
VaillantecoTEC pro 24CondensingGas91.1%
VaillantecoTEC pro 24VUW GB 246/5-3CondensingGas90.6%
VaillantecoTEC pro 24CondensingLPG92.3%
VaillantecoTEC pro 28VUW GB 286/5-3CondensingGas90.6%
VaillantecoTEC pro 28VUW GB 286/5-3CondensingLPG92.5%
VaillantecoTEC VU GB 466/4-5CondensingGas90.5%
VaillantecoTEC VU GB 656/4-5-HCondensingGas90.1%
VaillantThermocompactVU 282 EHNon-CondensingGas78.8%
VaillantThermocompactVU 242 EHNon-CondensingGas78.6%
VaillantThermocompactVU 182 EHNon-CondensingGas78.1%
VaillantThermocompactVU 142 EHNon-CondensingGas75.8%
VaillantThermocompact637 ENon-CondensingGas79.9%
VaillantThermocompact624 ENon-CondensingLPG81.5%
VaillantTurbomaxVUW 282 EHNon-CondensingGas78.7%
VaillantTurbomaxVUW 242 EHNon-CondensingGas78.5%
VaillantTurbomax Plus837 ENon-CondensingGas79.8%
VaillantTurbomax Plus828ENon-CondensingGas79.7%
VaillantTurbomax Plus824ENon-CondensingGas79.6%
VaillantTurbomax Plus28ENon-CondensingLPG81.5%
VaillantTurbomax Plus828ENon-CondensingLPG81.5%
VaillantTurbomax Plus824ENon-CondensingLPG81.4%
VaillantTurbomax Pro24ENon-CondensingGas79.6%
VaillantTurbomax Pro28ENon-CondensingGas79.7%

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

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.

Vaillant produce a wide variety of products from domestic boiler and renewable solar thermal systems to commercial boilers.

A large network of accredited installers and service agents exists to provide backup and advice when needed, spare parts are also abundantly available.

Vaillant manufacture high quality systems with a focus on efficiency and ease of use. Remember, your boiler is probably the most important appliance in your house so correct selection is key, you won’t go far wrong with a Vaillant.

Efficiency plays an important role in any boiler. Vaillant reckon that you could reduce your central heating bills by a third and cut your home’s CO2 emissions by 800 kilograms a year if your boiler was installed prior to 2003!

Vaillants complete range of domestic gas boilers were awarded Which? Best Buy status in 2016. The range includes the ecoFIT pure, ecoTEC pro, ecoTEC plus and ecoTEC exclusive with Green iQ. They were also awarded Quiet Mark status, which is the international mark of approval award programme from the UK Noise Abatement Society, encouraging worldwide companies to build noise reduction into the design of everyday machines and appliances.

How much do Vaillant boilers cost?

A Vaillant combi boiler can cost between around £870 and £1800 (excluding installation costs). A regular unit may cost between £800 and £1430, whilst a system model can be between £820 and £3461 (both excluding installation costs).