Mechanical equipment of buildings; a reference book for engineers and architects (1916)
Harding, Louis Allen, Willard, Arthur C. (Arthur Cutts), 1878-1960 · New York Wiley · leaf 545
in this line with this covering in place is, assuming a low value for the coefficient at 801b., and taking K = 2.65 B.t.u. per hr., H = 2.65 X (3.24 - 65) X 0.835 = 575 B.t.u. per sq. ft. per hr. Hence, for a year of 300 days at 10 hours per day the heat loss is = 575 X 300 X 10 = 1,725,000 „ , . ,… … Fig. 39. Moulded 85% Magnesia Covering fob Pipe and FrmNGS. Since this coal costs $4.00 per ton, the saving per sq. ft. of pipe per year is and per 100 ft. of 3 pipe = 91.65 X 0.38 = $34.80 per year.The cost of magnesia covering at 65 per cent off the list is 191.5 X 4002000 38 cents. 300 days, the…
Building · Heating · Ventilation
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