Re Crisco:
I have read that if you put a clay flower pot, inverted, over it, it can heat a room.
https://youtu.be/xnNHM4OLkvE
Good video, except the part about capping the hole in the inverted clay flower pot.
Many similar videos are on Youtube with room temperature experiments using the clay pot heaters.
Air flow is necessary to create effective room heaters.
You can use two bricks to elevate the clay pots, and set the candle between them under two or three clay pots (small, medium, large).
One smaller clay pot as the internal heater will get very hot. Air from the flame will rise up through the hole at the top of the smaller pot, creating the needed chimney effect.
A larger clay pot atop the smaller one will create an air channel, such that the chimney effect from the candle flame will pull up the cooler air from the room, heat it, and let it rise out the top hole with the candle heat.
This arrangement provides both the radiant heat from the clay pots, and it heats and circulates the room air, like most heaters and stoves have been doing for centuries.
ThankQ for the info on the clay pot room heater!