How does it work? The Autoflo Model 200P Whole house furnace mount humidifier is a drum type by-pass humidifier. Well designed and precision constructed of durable stainless steel, the plenum model is a by-pass unit, using a motorized rotating evaporator pad for increased efficiency. By-passed air is passed through the evaporator pad where it is moisturized, and then returned to the furnace blower for circulation throughout the house. For maximum efficiency, the humidifier must be mounted on the warm air side of the furnace.

Operation

The Autoflo Model 200P whole house furnace humidifier utilizes the evaporative by-pass principal to add moisture into the return air duct of your central heating system. A by-pass humidifer depends upon the pressure difference between the warm air (supply) plenum and the cold air (return) duct of the furnace. This pressure differential causes a portion of the warm air to flow from the supply plenum through the humidifier and into the return duct.

A water pan, located on the bottom of the humidifier, serves as a reservoir. The water level in the reservoir is asutomatically controlled by a float valve assembly. A cylindrical media wheel is partially submerged in the water pan and partially exposed to the warm air flowing through the humidifier.

When the furnace blower is activated, the media wheel is rotated by a drive motor. Water is evaporated as the by-pass system forces warm air through the media wheel. WHen this moisture-laden air enters the return air duct it is mixed with the dry air flowing through the duct. This air mixture now has the correct moisture content to pass through the furnace and gradually increases the relative humidity within your home.