How Energy Efficient is Your Boiler?

In 2025, we should all do our part to protect the planet. Small changes like ditching single-use plastic, eating less meat, recycling, and—the big one—saving energy can all help reduce our environmental impact.

In a typical UK household, the lion’s share of energy is used on heating and hot water. According to the Energy Saving Trust, heating accounts for 55% of your energy bills annually. Thus, having an energy-efficient boiler installation is vital. Not only will it help to bring down your family’s combined carbon footprint, but it will also add the benefit of making considerable savings on your utility bills.

All modern boilers today are condensing boilers, which are far more efficient than the traditional non-condensing type. A condensing boiler is fitted with two primary heat exchangers, which can recover some previously lost heat and send cooler gasses up the flue. To find out the specific energy efficiency of your boiler, try checking its energy efficiency rating.

Energy Efficiency Ratings Explained

All regular and combi boilers have an ERP energy label and an energy efficiency rating. The energy efficiency rating is the percentage of the total energy used to convert fuel into heating. This is detailed on a small sticker, typically displayed on the boiler or within its manual. Energy ratings are categorised from A to G. The newest models come with an A rating, which means they are highly efficient.

• A – 90% and above
• B – 86-90%
• C – 82-86%
• D – 78-82%
• E – 74-78%
• F – 70-74%
• G – below 70%

Time for an Upgrade? If you’re concerned about your boiler's energy efficiency, it could be time to consider investing in an up-to-date model. Switched On London ensures you get the most out of your appliance. We’ll guide you to the right choice, taking into consideration usage, space, and compatibility, and take care of the complete installation. Contact the team today to receive your free, no-obligation quote.