I guess I'm fortunate to live in the south with warmer winters. When I built my house, 11 years ago, I had my garages fully insulated and installed double insulated garage doors. I use a 1500 watt radiant heater hanging from the ceiling and it will keep you comfy in the winters. Now, summer time is another story. Southern summers with 100% humidity and no clouds in the sky is enough to not even want to think about going outside.
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