It’s easy to identify those hot, sticky days when a home would be unbearable without a central air conditioner. There are many times, however, when the average dry bulb temperature is lower than 75°F, but the average dew point temperature is greater than 60°. This condition equates to rh values greater than 65 percent; which makes most occupants of a home uncomfortable in conditions when an air conditioner will not run, as its primary control is based upon dry bulb temperature.