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I did my barn floor with radiant heat. Tubes are on top of the insulation then covered with 8 inches of sand then the 4 inches of concrete. The power company made me do it this way in order to qualify for off peak rates. I do not have a secondary heat source so if power goes out the heat sink will keep the place above freezing for some time (days).
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87 Carrera
09 F-150
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