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Cost of Heating Loss Due to Exhaust

Heating $/hr=(.154 x CFM x (dg) x T x C)/q

Enter CFM exhausted to the outside or use 5000 CFM as a convenient value
CFM =

Enter hours worked per week - T:
T =

Enter available Btu per unit - q - from table:
q =

Enter cost of fuel $/unit - C - from table:
C =

Select desired air temp and enter annual heating degree-day normal - dg - from table below:
dg =

Cost of Heating Loss per year - $ - :
$

Available Btu (q) and Cost Per Unit Of Fuel (C)

Fuel TypeUnit Of MeasureAvailable Btu Per Unit - q Average Cost Per Unit $
CoalLb60000.0522
OilGal1065002.52
Gas Heat ExchangerCu.Ft.8000.01664
Gas Direct FiredCu.Ft.9000.01664

Annual Heating Degree-Day Normals (dg)

Air Temp FAlbanyBostonChicagoClevelandDetroitMinneapolis
80117821040910613113431095913176
781106296909940106211025612478
7610356899492839915958111797
749669831786569229892011142
729007766880468567829110496
70836470467468792876789870
68775064586905731371009269
66716259036373672265438687
64660753705875616560208131
62608148735399563655337590
60558643994936514050547086
Air Temp F N.Y.PhiladelphiaPittsburghSt. LouisWash.,D.C.
80 928496521079789438422
78 859689541007683107764
76 79388285937977027139
74 73087641870271216538
72 67067028805065605974
70 61466438742960235438
68 56065886683355234929
66 51015360627250534455
64 46214864573445954014
62 41764397523441683588
60 37473952476937613182
Air Quality Engineering

Air Quality Engineering