I have saved up some different size cans and want to make a multi-can sleeved "furnace" that I can insert a candle into for heat.

The reason I am thinking of a multi-can sleeved type "furnace" is to reduce the heat intensity on the outermost can so that anything touching it does not catch on fire.

There is a web site recommending the use of supplemental heat in the form of a candle for assisting individuals that are on the verge of hypothermia. They recommend wrapping the victim in a space blanket with the head outside the blanket so they don't asphixate themselves from the candle burning in the "tent" they make by wrapping themselves in the space blanket.

Because of concerns that the a candle could set off the space blanket with its open flame, I figure a multi-can sleeved "furnace" could reduce the intensity of the heat at the outermost can while still producing and utilizing all the heat the candle puts out.

The trick is to keep the innermost can covering the candle cool enough so that the candle does not melt into a blob instead of burning normally and getting enough air flowing through the outside can so it stays cool enough to keep its surface from igniting anything. Right now, I am planning on (3) cans sleeved into each other with spacer supports pop rivetted between each can. Figuring out the spacing of air intake and exhaust ports will probably be the hardest part.

Bountyhunter