Consider a hot humid day 90F and 90% RH. We want to condition the air to 70F at about 50% RH. We do this by chilling the air far enough to condense out enough moisture to dehumidify it: the goal is to have air with absolute humidity not exceeding 0.008 lbm of moisture per pound of air (~50 to 55 grains per pound of dry air). Show the processes on the psychrometric chart.