Relative humidity (RH) can be affected by HVAC systems. RH is a measure of the amount of moisture vapor in the air compared to the maximum amount of moisture vapor the air can hold at a given temperature. The best measure of moisture is RH because it is a measure of the moisture vapor in the air, rather than the amount of liquid water in the air.
Water damage can be caused by high RH. When the RH is high, the air can hold more moisture vapor. If the moisture vapor in the air increases then it can condense, which can lead to water damage. Water damage can cause a variety of problems, including mold growth, structural damage, and health problems.
HVAC systems can affect the RH in a home by either increasing or decreasing the amount of moisture in the air. For example, air conditioners remove moisture from the air, while humidifiers add moisture to the air.
It is important to maintain the RH in a home within a comfortable range. The ideal RH range is between 30% and 50%. If the RH is too low, the air can become dry and uncomfortable, which can lead to a variety of health problems. If the RH is too high, the air can become humid and uncomfortable, which can lead to water damage.