In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Formulas for heat-loss calculations
Can anyone confirm any of these formulas for me?
BTU losses = sq. ft. X (1/R) X temperature difference in F
Losses to ceilings are 15% higher due to radiation losses?
BTU losses via infiltration = room volume Cu. Ft. X .018 X temperature difference in F X A
A= .2 for well sealed rooms, ranging to .5 for poorly sealed rooms