Cost of Heating Loss Due to Exhaust

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 - $ - :
$