Posted by George Marsh on March 06, 2013 at 12:20:29 from (50.104.195.160):
In Reply to: Re: Shop Floor Heat posted by sflem849 on March 06, 2013 at 11:55:36:
sflem849, Decided to crunch some numbers. My 30x40 pole barn has a 6 inch floor. Using my floor, it will take 444,444 BTU's to change concrete just 10 degrees. If I used a 5500 watt electric water heater, it would take 23.7 hours to do the job. Not factoring in any heat losses. SOOOOOO, it will cost me $15 to change my floor temp 10 degrees.
If anyone wants to check my calculations:
specific heat for concrete is 0.5 1 yard of concrete is 4000 pounds. these numbers may not be exact, but close. I was trusting my old memory.
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