This seems to be a continual urban myth on the internet. We've all seen pictures, and plans on how to build these supposed heaters with a flower pot, and candles. The idea is that you can supposedly heat a room with this, as if the flower pot somehow magically makes a candle into a furnace.
You cannot break the simple laws of physics, no matter how many times the internet says you can!!!
Alright, so the amount of energy it takes to heat a room depends on how well it's insulated, how many windows and doors there are, are the windows double pane etc.. If it's one degree colder outside than it is in your house, you will need a lot less energy to heat the room than if it's minus 20 outside. These things are just common sense. We're going to use an example of a small room with
A calculator for determining BTU loss in a small room. |
A candle creates both heat and light. It does so by burning the wax that it's made of, and X amount of wax has X amount of energy available to be given off per ounce, or pound, etc., when you burn it. This is a constant number, and a flower pot can't inject more BTUs into that wax.
A standard "Tea" candle when burned, will on average give off 600 BTUs per hour!!!!
It's simple math folks. It will take 20 candles burned up per hour to heat a small room, or 480 candles in a 24 hour period. At 50 cents retail to buy a candle, you would spend $7,200.00 a month to heat a small room with candles!!! This is the bottom line whether the candles have a flower pot on them, or the occupants of the room have a tin foil hat on their heads!!!