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

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News (1 / 1) 10.02.2026 13:20 / Peter

A simple kitchen hack from France is causing a stir in German households: A roll of aluminum foil, properly placed behind the radiator, is supposed to reflect heat and allegedly save up to 10 percent on heating costs - a real beacon of hope in times of rising tariffs. Read on to get the full story!

Why this topic is so hot

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 old buildings lose a lot of energy through windows, walls, and the cold surface behind radiators; up to 7% of the heat is lost here.

The aluminum foil trick, simply explained

The method: Place aluminum 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 almost nothing: A roll of aluminum foil usually costs less than 2 Euros and is enough for several radiators.