I used my Snow Peak Giga Power stove Christmas Eve to simmer dinner in temps in the mid 20F's. I used a hanging windscreen around the stove and part way up the sides of the pot, with the windscreen suspended off of the pot supports by two pieces of wire. I had trimmed it back a little more before using. The windscreen is only around 2.5" in height. With so much open space below it, I was still surprised at how much thermal feedback the canister received. After 15 minutes of use at a simmer setting, the top of the canister was still very touchable by hand and I could feel the coolness of the remaining fuel, which by then was maybe 1/3 full. I have no worries as I've had vintage gas stoves like a Optimus 8 have its fuel boiling and the SRV vent after bringing two pots of water to a boil, way beyond now I see of its capability. Canister fuel cools as fuel is used up. You just need to moniter fuel temps to operate safely.
Duane