Cooling Capacity Total Heat Formula
Total Heat Cooling Capacity Formula
Total Heat Formula: Use this to figure out Cooling Capacity.
BTUH= Delta h (btu/lb.) x CFM x 60 min/hr x Specific density (.075 lbFT^3)
60 minutes/hour x 0.075 lb./ft3 = 4.5 you can shorten the equation too.
BTUH= 4.5 x CFM x Delta h
(Delta h = The change in enthalpy between return and supply air)
Total Heat Constant Correction Factor = Specific Density of Air in lb. per CuFt. x 60 min per hour
The Psychrometric chart shows Specific Volumes of Air, for example 13.33 cu’/lb. of standard air at 70°F. If you need the specific density, then just take 1 divided by 13.33 cu’/lb. to get a specific density of standard air at .075 lb./cu’.