Minimum Temperature for a Humidifier

Humidity Levels

• Indoor air humidity levels tend to become a concern during cold months. Indoor heat sucks moisture from air as well as furniture, artwork, even porcelain, paper and fresh fruit. It also can contribute to the presence of static electricity in the home. In humans, dry hair, skin, nasal passages and nails can result from low indoor moisture levels. The ideal relative humidity level is between 40 and 60 percent. When the moisture level in the home drops below 40 percent, a humidifier can help restore balance.

Evaporative Pad Humidifier

• The evaporative pad humidifier features a replaceable pad filled with water. Water evaporates from the pad into room air. This type of humidifier can be installed on heating, ventilating and air-conditioning equipment, such as a forced-air furnace. The evaporative pad humidifier requires that the furnace temperature discharge air of at least 120 degrees Fahrenheit to operate optimally. The heat from the furnace air creates enough energy for the water in the pad to evaporate. When the furnace is not producing air at such a temperature, the humidifier output is below rated capacity.

Steam Humidifier - Electric

• An electric humidifier boils water to create steam, which is then extruded into room air. An electrical element, such as a coil, is placed into a water reservoir and activated. When the temperature of the water reaches the boiling point -- 212 degrees Fahrenheit -- steam is released into the air. The reservoir must be monitored and refilled regularly. In addition, because water contains minerals, residue will develop on the element and inside the reservoir, reducing operating efficiency. Regular cleaning of this type of humidifier is therefore a must.

Steam Humidifier - Electrode

• In an electrode humidifier, electrode plates housed in a canister pass electrical current through water until water reaches the boiling point, that is, 212 degrees Fahrenheit. This type of humidifier is often used in commercial applications. It is installed near the HVAC system, so the steam from the unit can be distributed via ductwork. When the canisters no longer function efficiently, due to mineral deposits for example, they are simply replaced.