What is the function of a psychrometer in HVAC systems?

A psychrometer is a crucial tool in HVAC systems specifically designed to measure the moisture levels in the air. It typically consists of two thermometers: one that measures the actual air temperature (dry bulb) and another that measures the temperature of air evaporating from a wet surface (wet bulb). The difference in readings between these two thermometers can be used to determine relative humidity, which is essential for assessing and controlling indoor air quality, comfort levels, and energy efficiency.

Understanding moisture levels is vital for HVAC systems because high humidity can lead to discomfort, condensation, mold growth, and reduced effectiveness of heating and cooling systems. Conversely, very low humidity can cause discomfort and health issues. Thus, the function of a psychrometer in HVAC is integral to creating a balanced and comfortable indoor environment by providing accurate data on moisture content in the air.