Old 01-25-2010, 03:41 PM
  #9  
nautiduck
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Join Date: Aug 2009
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My uncle heats his semi truck tire shop in NW PA with radiant floor heat only, its 100' x 120'. He has the ceiling (40') insulated with 12" bat and the walls 12" bat also, and I believe he said his costs to heat the building in the winter were about $350 (might be a little more now that was about 4 years ago) a month thats with the doors being opened and closed all day. Once the concrete gets warm it doesnt take much to stay warm. I believe he has a 12" slab but it may be 14". I know he had it poured a little thicker than needed. He uses a regular gas fired boiler with 3/4" lines and I think 10 or 12 runs with either 2 or 4 controllable zones.
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