The purpose of a whole-house humidifier, in addition to preventing damage to your belongings, is to prevent the dry, scratchy throats and rough skin that result from being in a dry environment. Aprilaire humidifiers evaporate water so that it passes as a vapor through your ventilation system. As heated dry air passes over the water panel, evaporation naturally occurs. The humidified air is then cycled through your home's heating ducts. The dial setting allows you to manually adjust the humidity level in your home.
In the winter months, your Aprilaire humidifier should be turned on and initially set to “5” on the dial. Because regular household activities such as showering and cooking alter your home’s relative humidity, adjust this setting as needed for a comfortable humidity level. An added benefit of a whole-house humidifier is that humid air feels warmer than dry air, so you will feel warmer even when the thermostat is at a lower setting.
One reason air conditioners are effective at cooling your home is that they reduce humidity in the air. Because of this, it is important to turn off your Aprilaire humidifier during warm months so that you are not forcing your air conditioner to work harder. To turn off your Aprilaire humidifier for the summer, switch the lever on the humidifier to the “summer” position. Then close the valve to shut off the water supply. You do not need to adjust the manual dial. Remember to open the valve and the damper at the end of summer.
Aprilaire recommends annual maintenance and changing the water panel at least once a year. The service person who inspects your furnace should also check the humidifier’s condition.
Although the humidifier is designed to operate using hot, cold, hard or soft water, the water feed system should be cleaned periodically to rid the water line and strainer of mineral deposit build-up.
Refer to your Aprilaire owner’s manual for instructions specific to your humidifier.