I tried this radiator trick from France, my heating costs dropped drastically.

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Stars (1 / 1) 09.02.2026 13:48 / Torben

A simple kitchen hack from France is causing a stir in German households: A roll of aluminium foil, correctly placed behind the radiator, is said to reflect heat back into the room and reportedly save up to 10 percent on heating costs - a true beacon of hope in times of rising tariffs. Read on to get the full story!

Why the Issue is Heating Up

Since the energy crisis in 2022, prices have been climbing - according to the Federal Network Agency, households paid up to 30% more last winter. Particularly older buildings lose a lot of energy through windows, walls, and the cold surface behind radiators; up to 7% of heat is lost here.

The Aluminum Foil Trick, Simply Explained

The method: Place aluminium foil behind the radiator to direct radiated heat back into the room. Heating professionals recommend this reflective solution; it works like a heat mirror and costs next to nothing: A roll of aluminium foil usually costs under 2 euros and is enough for several radiators.