Money saving expert Martin Lewis has revealed a simple energy tip that could save you over €100 on your heating bill.
The MoneySavingExpert founder urged households to check their boiler's "flow temperature" if they want to save a few quid.
The flow temperature is the temperature your boiler heats up the water to before sending it off to your radiators.
Speaking during the latest episode of his Martin Lewis Money Show Live on ITV , he explained how your boiler should be set at 60° - but most are programmed much higher than this.
"You normally want it to be around 60°, but most people's boilers are set higher - that's really inefficient," said Martin.
"You can turn this down. It won't affect the heat in your house. It'll still be the same temperature.
"It won't affect your hot water temperature - it might take slightly longer to get up to the maximum temperature.
"But it can cut £100 a year off your bill and is well worth everyone doing."
He added: "This is an absolute no-brainer, and everyone with a combi boiler should be trying this."
Angellica Bell, who co-presents the Martin Lewis Money Show Live, shared a success story from one viewer who tweaked his boiler setting.
"His boiler had a high temp of 85° - he now has a boiler flow temperature of 60°, which works just as well and saves money," she explained.
If you're unsure how to lower your boiler flow rate, Martin recommends using the free MoneySavingBoilerChallenge.com website.
Martin also explained other ways to get your home ready for the winter:
Get free water-saving devices
There are 900,000 freebies on the Save Water Save Money website up for grabs from different water companies.
This can include things like aerated shower heads, where some air is pumped through instead of water, so you're losing less water.
"I always talk about this when I talk about water saving, but actually, the water you used is heated. We pay for it to be heated - use less water, use less heat," explained Martin.
This could save you over €50 a year on your heating bill if you have lots of showers.
Turn down the thermostat one degree
Martin urged viewers to take the thermostat challenge when they turn their heating down by 1° if they can.
This could save you roughly 10% on your heating bill.
"The World Health Organisation says 18° is fine for healthy adults. Younger, older or ill, you might need more," said Martin.
He continued: "It's not for me to tell you what to do, but I'd like you to try reducing one degree. So say you're at 21°, try reducing to 20°. "
Use your curtains tactfully
This tip simply means thinking more carefully about when you open and close your curtains to maximise the heat that stays in your home.
"When the sun is shining, it's letting light and heat into the house, so you want the curtains open," said Martin.
"When it gets dark, it's not, you want to keep the heat in, so close the curtains.
"I know we all know that, but doing it rigorously can help insulate, especially if you line it with a fleece, and there are lots of tips online on how to do that cheaply."
Check your fridge temperature
Martin warned how many households have their fridge freezers set at the wrong temperature.
If this is you, you could be throwing away money.
"5° degrees is what your fridge needs to be set to, -18° for your freezer. If it's colder, you're wasting too much money," he said.
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