>>1916878Op here, also as you use the stove/gas, the canister and fuel cool even more in a runaway cooling effect from the gas boiling/expanding. They’re just not reliable (reliability is important) enough for any marginally cold temperatures (<32 degrees). And yes I’m aware different gas mixes exist and if you find a canister with more propane or isobutane, you can get down to slightly lower temperatures, but then even at 15-20F, you’re still going to run into problems, especially since the fuels inside the canister will separate and you’ll burn off all the propane first, and be stuck with a canister of liquid butane that won’t boil.
With a inverted canister stove, you end up having all the same bulk, weight, and gas tubing as you’d have with a liquid fuel stove (whisperlite) anyways, but more expensive fuel and an arguably less reliable system.
https://backpackinglight.com/evaporative-heat-loss-in-upright-canister-stoves/ 