Money Wellness

energy

Published 17 Oct 2025

2 min read

The £100 boiler hack that could keep you cosy all winter

If your heating bills made you wince last year, there’s a quick fix that could save you up to £110 this winter. And it takes less than five minutes to do.

Image of someone turning down their boiler flow temperature. The £100 boiler hack that could keep you cosy all winter
Caroline Chell - Money Wellness

Written by: Caroline Chell

Head of Communications

Published: 17 October 2025

It’s all to do with your boiler’s flow temperature - the heat of the water that travels around your radiators. Most boilers are set far too high, often between 75°C and 80°C. That means they’re burning through gas they don’t need to.

By turning it down to around 55°C–60°C, your boiler won’t have to work as hard, but your home will still stay warm and toasty.

It works best for newer condensing boilers, which are designed to run more efficiently at lower temperatures. If yours is a bit older, you can still try lowering it slightly to find the sweet spot where you stay warm but save cash.

And here’s another top tip - keep your thermostat between 18°C and 21°C. That’s the ideal temperature range to stay comfortable and avoid damp or mould.

What to do if you’re worried about heating bills

If you’re worried about heating costs this winter, it’s worth checking whether you qualify for any energy support or hardship schemes from your supplier. Many offer grants, discounted tariffs or help with debt if you’re struggling to pay.

So before you reach for the thermostat, try this simple boiler trick first. It could be the easiest £100 you’ll save all year, and your home will still feel just as snug.

 

Caroline Chell - Money Wellness

Written by: Caroline Chell

Head of Communications

Caroline has worked in financial communications for more than 10 years, writing content on subjects such as pensions, mortgages, loans and credit cards, as well as stockbroking and investment advice.

Published: 17 October 2025

The information in this post was correct at the time of publishing. Please check when it was written, as information can go out of date over time.

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Caroline Chell - Money Wellness

Written by: Caroline Chell

Head of Communications

Published: 17 October 2025

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