When one accounts for the sensible heat load from outside air, the Carrier formula says OASH = 1.08cfm(Toa-Trm), but if you stop to really think about it, shouldn’t it be OASH = 1.08cfm(Toa-Tsa)?
(Where OASH = Outside Air Sensible Heat, Toa = outside air temp, Trm = room design temp, and Tsa = supply aitr temp.)
Actually, I believe the latter is overkill because the former formula is simply serving to match outside air condtions to room design conditions. Regardless of what Tsa really is, you basically only have to remove heat to get the air down to Trm. Is this correct? I need a solid argument to present to one of contrary opinion, and the answer I get from the latter method is larger than I wish to accept…if I can justify the former method yielding the smaller solution, that is!
Surely, Carrier can’t be wrong!
- Jinx