I've used a double burner Coleman many-many times in permies with no problems. I've also used single burner ones in portable shanties. I cook with them and use them for heat. Most shacks are drafty enough IMO, or maybe it's how I build them...
If you are chasing flags and checking traps once every hour or so, just opening the door makes a nice air exchange.
As to you guys saying it has a lower flash point but yet you recommend propane? If the flame goes out on a stove, the heat no longer builds pressure on the generator and the fuel slows down and stops if you are not there to pump it up. What happens with a propane stove if the flame blows out? Right. It keeps on coming out. Not so on a Buddy, I know.
You could get a propane converter for the 2 burner if you feel safer with propane. A 2 burner stove is about 7,500BTU and 6,500BTU main and secondary burner. My new single is 7,500BTU. My older single (4'500BTU) heated a 6'x6' Eastman's Ice cube right down to t-shirt comfort.
If you have the stove and money is tight, use it. I almost bought a Big Buddy but after realizing the sheer number of different ways at my disposal to heat a shack or make a fire on the ice, I chose not to 'waste' my money.
2 single burners
1 two burner
1 three burner propane
3 kerosene wick burners
and a small woodstove
When the power goes out here, we still eat good hot meals!
