The Spring bar Canvas Tent Breaths. In short, allllll other materials don’t. If you use the best of the best Wave Propane
Unit for the conditions 3, 6 or 8 you are toasty with low humidity. No dripping!
I have a high liner 6 with a wave 3 and it is good but a six would be Bahamian. Tough call.
The point being: hydro carbons / water in gas, canvas lets it out.
There is no other effective way to warm a canvas tent other than wood or a diesel heater that willl break down. The cavas and propane are in love with Wave. not an ad