I have a 2 bay attached garage. It borders the house on 2 sides, one side is to the outside, one side is obviously the door. It is a brick house, but the outside wall does not seem to be insulated, at least not well. It is drywalled and has a ceiling.
Garage door is double width, metal, and does not appear to be insulated (how could I tell?) because it becomes very hot or cold to the touch based on season.
During the winter it gets quite chilly, and I am looking for a passive heating method for 3 reasons:
1. Hot water heater is in garage, and appears to labor under colder conditions, hot water does not last as long
2. House (inside) sometimes seems colder near the garage.
I am near Chattanooga, TN for questions about climate.
I am considering this or something like it:
Is this a proper/reasonable/cost effective/SAFE (i.e. fire hazard) method? Are there better methods?
I don't need to warm it to 72, just maybe 50. Just defeating the chill, that's all.