ideas for permie heater

[iowaperch44]

I recently just purchased a 16 foot camper that has been converted into an ice house. I was just wondering what would be the best heater to get. I mean i have a couple sunflower heaters but i dont think that these would be the best idea for when we sleep in it over night. any ideas are greatly appreciated.

[crappiebuster]

My buddies and I fish out of a similar setup. We went with a 20,000 btu ventless blueflame heater. It works well. Was a litte worried about carbon monoxide but we have a detector and its never gotten above unsafe levels. The heater was a little overkill but when its -20 you can have it to room temp in a minute. Im sure 15,000 btu would be fine. But then again if you have 400-500$ just go with the vented units.