My dad and I are both in GA and have been trying to figure this out as well. He tried a propane heater until we read about the possibility of passing out due to the carbon monoxide. The open flame situation was never good, either. He came up with the idea to use the air handler from a heat pump unit. It's the part that goes inside the house--so it's just an emergency heat strip with a blower. There's no a/c coil on top. He built a makeshift plenum on top to restrict the air flow with a vent on it. It heats better with the restriction. It has 2 filters over the air intake hole. It's even on a thermostat. His is wired directly to his breaker box. Because the blower is so strong, all of the dust in the room gets sucked up to the filters, keeping the room clean. His works great--and heats a metal carport with one end enclosed and a fabric drop cloth covering the other end. It has gotten down to 40 degrees and it heated the room up to 70 in about 20 minutes. The best part is...we both bought the air handler with the heat strip for $75 each. The extra metal to build a plenum was $12 at my local hvac supply. You would need a breaker and some wire to direct wire it. Cheap and effective!