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Consumer Experts Which? Share Radiator Trick to Help Keep Homes Warm This Winter

Which? says purpose-made reflector panels can save households up to £20 a year by reducing heat loss behind radiators.

  • Which? shared a TikTok video demonstrating how "putting foil behind radiators allows the heat to be reflected back into the room," describing the method as a quick, cost-effective hack for any DIY-er.
  • The Energy Saving Trust explains that placing reflector panels on uninsulated external walls prevents heat from escaping outside, effectively reflecting warmth back into the room.
  • Purpose-Made reflector foil typically costs around £8, according to Which?, and installing panels on external walls can save households £18 annually in Great Britain or £20 in Northern Ireland.
  • The Energy Saving Trust notes that standard kitchen foil lacks proper insulation or design, whereas purpose-made panels are generally easier to install, often featuring adhesive backings or mounting clips.
  • Before installation, the trust advises switching off radiators and allowing them to cool, while renters should confirm landlord permission and follow manufacturer instructions when applying panels.
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Consumer experts Which? share radiator trick to help keep homes warm this winter

Which? suggests foil behind radiators to retain heat. The Energy Saving Trust explains where panels work best and disputes the kitchen foil advice.

·Bradford, United Kingdom
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Reflective film can return some of the heat to the room, but the result depends on the wall behind the radiator.

There is no need to stick foil behind each radiator. It is most advisable to use it where the battery is located near the cold outer wall.

In an average corner house with uninsulated exterior walls, foil behind all radiators against those walls can save about 50 euros per year, Milieu Centraal calculates. With well-insulated cavity walls, the same job yields hardly anything. The post This is what radiator foil really pays off, and also see for which walls it is a waste of money appeared first on Duurzaamnieuws.

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Duurzaamnieuws broke the news on Saturday, October 31, 2026.
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