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What are the most energy efficient boilers?


What are the most energy efficient boilers?

The cost of heating makes up something like 60% of home energy bills, so getting an energy efficient boiler can make a big difference.

Recently, boiler efficiency has been shown as an A-G rating on what’s called the ErP energy label. However, since nearly all modern gas condensing boilers get an A energy rating, it’s not the best indicator if you want to really select for the most efficient.

In that case, it’s worth looking to the efficiency rating (labeled as SEDBUK-2009 or AFUE – Annual Fuel Utilisation Efficiency) which is given as a percentage. For the last few years it has been the case that only boilers that are 88% or more efficient can be installed in homes.

Once you get to this level of efficiency, the truth is that there is only a marginal difference in running costs between a boiler that is 92% efficient and one that is 94%. The biggest differences come from having a modern efficient boiler to replace an ageing inefficient one, as well as implementing the best energy conservation measures in the home [ link to previous article ].

That said, there are some significant differences between the different models on offer and, of course, there are variations within models depending on fuel type, combi or conventional boilers. If you’re looking to get some of the best energy-efficient boilers, these are a few you might look at.

Worcester Bosch Greenstar Camray

Greenstar Camray boilers generally have a SEDBUK average annual efficiency of 94.2% - significantly higher than the standard efficiency boilers that hit around 78%. It’s designed for easy installation and servicing and, in our experience, Worcester Bosch boilers are generally amongst the most reliable we come across. 

Vaillant ecoTEC Plus

The ecoTEC plus is Vaillant’s flagship boiler, designed to give the best efficiency performance. It provides precision heating, able to adapt when it knows you don’t need as much power to drop to as little as 16% to save money on your bills. Vaillant are also another highly rated brand that we are happy to recommend.

Viessman Vitodens 200-W

This is Viessman’s flagship range, considered by engineers to be one of the best constructed and amongst the most efficient gas boilers on the market. It is a wall-mounted gas boiler with the ability to be controlled remotely with a phone app. Viessman is a brand highly rated for reliability and quality overall.

If you’re considering a new boiler, and you want to discuss your options with regard to the best energy efficiency performance, contact us.

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