Water vapor is always present in the air. However, there are negative consequences to your health and your home if the level of moisture is excessive or insufficient. Controlling the amount of moisture is not the easiest task, but a dehumidifier or a humidifier can help. Whether you need a humidifier or a dehumidifier depends on the relative humidity inside of your house.

Difference Between a Humidifier and a Dehumidifier

Relative Humidity – What Is It?

Simply put, relative humidity, or RH, is a measurement of how much water vapor is in the air in relation to the moisture capacity of the air at a specific temperature, and it’s described in percentage form. The higher the temperature, the more water vapor the air can hold. A relative humidity of 50 percent means that the air is holding one-half of its maximum moisture capacity. When the relative humidity is 100 percent, saturation occurs, which causes rain.

The Ideal Relative Humidity Level

One factor that determines the best relative humidity level for an individual is his personal comfort, and that percentage varies from one person to the next. However, to stave off the ill effects of high or low humidity, the ideal level ranges from 30 to 50 percent.

You also need to take into account the outdoor temperature. Usually, you’ll want to keep the relative humidity higher in warmer weather and lower in cooler weather. For instance, on a hot summer’s day, strive