Who is good with numbers? I have a Quonset style building owner wants to be heated year round. Do not know what R is in the walls/ceiling. Anyone good with numbers? Here are some of the knowns. 140'lx45'wx20'h. 30*f outside, building lost 6* in a hour 65* to 59*. What formula do I use, is this enough information to figure a btu load at -25*?
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