CHICAGO - If the relative humidity is high indoors, what caused it? Possible sources include outdoor air infiltration, indoor activities, and problems with the air-conditioning system. This ...

Understanding the relationship between dry bulb temperature, wet bulb temperature, rh, and dew point temperature is essential in all facets of air conditioning. These psychrometric processes play an ...

At head of title: U.S. Dept. of Agriculture, Weather Bureau.