OK, so after some googling I can say that my explanation was actually correct. A single ordinary tealight candle has a heat output of 30-40W though which is way

OK, so after some googling I can say that my explanation was actually correct. A single ordinary tealight candle has a heat output of 30-40W though which is way too low to keep a room warm but the radiative heat from the pot indeed does heat nearby objects (or people) much like a patio/mushroom heater does. https://en.wikipedia.org/wiki/Tealight https://en.wikipedia.org/wiki/Tealight (German) https://www.kreativ-bastelstube.de/teelichtofen-heizleistung-kerzenheizung-waemeleistung https://www.kreativ-bastelstube.de/teelichtofen-heizleistung...