We've seem to be switching between stove types within our responses. The above link seems to be referring to a "stove on top" style of canister stove. Whereas, I was talking about a "detached stove". The former doesn't seem all that ideal for melting snow as they tend to be a bit unstable, only made worst because you have to constantly touch the pot when adding snow and removing water. The later seems to be a better snow melting setup from a stability point of view; however, it doesn't benefit from the being placed closed to heat source.
Dang it, now I'm all confused. What sort of snow melting cansiter stove setup is ideal when temps are below 20F? 15F? 10F? Or should canisters not even be considered at those temps regarless of which wacky setup (cooper wire thing, pot-o-warm water, etc.) you choose? RJ's article only mentions temps down to 23F. Which, I think, is a rather "warm" winter trip, espeically for morning temps.
Maybe canister stoves are out of the question of sub-20F temps? If so, please let me know and I'll stop considering one for snow melting.