Hey All, Im currently finishing up my ice shack, and about to order my propane heater. Ive decided to go with a direct vent propane heater, rather than a "vent-free" heater (legality and safety reasons). I am wondering how large of a heater to order, so I wanted to know what size/kind other people are running, and to what success. Any and all info would be greatly appreciated. Size and insulation in your shack would also be helpful. I am currently running a test with a 9000 BTU Mr. Buddy heater to see how much it heats my 6x10 shack in one hour. Thanks in advance, Paul