A space is to be heated and humidified. The space has a calculated heating load of 125,000 Btu/hr sensible, and 53,570 Btu/hr latent. Steam with an enthalpy of 1,150 Btu/lbs is to be used to humidify the air. The supply air temperature into the space is 110 °F. The space is to be maintained at 75 F and 50% Relative Humidity (RH). Ventilation air in the amount of 1000 CFM is needed. The outside air condition is 35 F and 60% RH.
Determine:
a) The amount of supply air needed to the space (CFM)