Replies

1. 
   Nick Welch|Oct 17, 2014 06:10pm|#1

   I googled and a few sources give ranges of about 10-15w/sqft.

   http://www.heattechproducts.com/12w-vs-15w-floor-heating-systems

   http://www.transenergysystems.com/radiantvsconvection.html

   http://www.nachi.org/forum/f18/radiant-ceiling-heat-18134/

   Older ones might tend more towards the 15w number due to less insulation, but that is just a guess.

   1瓦特3.412 btu / h,这些交易nslate to 34 to 51btu/h per square foot.

2. 
   Charlie Sullivan|Oct 18, 2014 10:43am|#2

   Does it have any electrical specs on it, like amps or watts? If not, you could turn it on and count how much faster your electric meter runs to find out its electrical power draw. Then it's just the unit conversion that Nick provided from watts to BTU/h. And if you have amps, you can just multiply that by volts to get watts, since the power factor is 1.0 on an electric heater.