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

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Stars (1 / 1) 10.02.2026 13:08 / Frank

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

Why this matter is heating up

Since the energy crisis of 2022, prices have been on the rise - households paid up to 30% more last winter, according to the Federal Network Agency. Particularly in old buildings, a lot of energy is lost 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 sufficient for several radiators.