How to Inspect the Exterior, 23.5 states:
“For example, according to the psychrometric chart, air at 68º F (20º C) with 0.216 ounces of water (H2O) per pound of air (14.8g H2O ÷ kg air) has a 100% RH. The same air at 59º F (15º C) reaches 100% RH with only 0.156 ounces of water per pound of air (10.7g H2O ÷ kg air). The colder air holds about 28% of the moisture that the warmer air does.”
This isn’t quite right. The colder air holds 28% LESS moisture than the warm air. Not 28% of the warm air moisture. 28% of the arm air moisture would only be .06 ounces of water per pound of air.