Checked: the 'stove of the poor' works (although very slowly).
Would it be possible to heat any room in a house with only 10 cents a day?
It seems that yes there is a way and that it is something easy, we will only need a few very simple tools: a metal tray, two ceramic pots of different sizes and candles. It is a method that would be suitable for normal homes and for offices.
The cost of materials is very low.