Originally Posted By: dweste
I have tried candles and even small propane heaters, but do not have a good way to keep a closed tent warm in winter. Do you?


Yes: A liquid fuel stove. Parafin or white gas. Effects above 1.5 kilowatt.

If it's a large tent such as a tipi: A wood stove.

A candle can to some extent heat a small shelter such as a bivi bag, but not much more.

Gas canisters: Unless you take special precautions AND have dedicated equipment and gas canisters designed for cold weather I wouldn't trust ANY gas canister equipment to work in the cold. (Unless inside a snug and warm shelter, that is... but it's hard to achieve that if you depend on gas canisters to warm the gas canisters so they'll work....)
See page 11-13 on this thread for a more comprehensive discussion on gas canister equipment:
Get home bag - thread