KANSAS CITY, Mo. — It was the last morning of the American Society of Heating, Refrigerating, and Air-Conditioning Engineers’ (ASHRAE’s) 2003 Annual Meeting. A lot of people were returning home that day. However, meaty sessions were scheduled for that morning, we assume, to encourage people to participate to the very end.

That’s what happened the morning of July 1, when papers were presented at 8 a.m. on the “Effects of Unitary Cycling on Unitary System Performance.” The session was standing room only, and for good reason: The researchers were discussing moisture loads from unitary air conditioners.