Quote:
Originally Posted by acidrain
At 6 amps per sq.ft., you'll be able to ano to about 3 sq. ft. of surface area.
18 amps x 15 volts = 270 watts.
270 watts = 922 btu's during a 2 hour run.
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Whats the formula for getting the btu's as I didn't see it with the 720 Rule calculator?