Does it make a room warmer?

In principle, the tea light heater works very simply: If you light the tea lights, warm air circulates between the flower pots – and heats them up. The clay stores the heat and gives it off.

You can always find it comfortable. Warming your hands: definitely works too. But does such a tea light oven also heat a room? WirtschaftsWoche started a self-test for this several years ago – once with a kit and once with a finished product. The most important answers and experiences about heating with the tea light oven in a self-experiment.