The Skuttle 86-UD is the correct system to use with the following filter:
The Skuttle Under Duct Mount Drum Humidifier uses minimal electricity and water that makes this under duct humidifier one of the most economical and ecologically friendly mount drum humidifiers to operate. Also known as part number 86-UD, this Skuttle Drum Type Humidifier handles more air volume than their plenum-mount counterparts, since air flows directly through the ductwork instead of a 6" bypass tube. The cabinet of this Skuttle 86-UD Under Duct Mount Humidifier is made from durable, corrosion-resistant thermoplastic. The motor rotates a polyurethane foam evaporator pad that helps to live water out of the water pan and into the dry air stream. The heating system circulates the newly-moistened air throughout your home.
Skuttle 6" Under Duct Mount Drum Humidifier specifications:
The Skuttle Drum Humidifier does not produce harmful contaminants or release pollutants such as iron, lime, calcium and bacteria into the air. The efficient design of this drum humidifier helps to increase the airflow around the evaporator pads. The mounting frames are easily and quickly removed from the duct for easy cleaning and servicing. With normal maintenance, the Skuttle 86-UD will not cause airflow resistance. At the end of each heating season, be sure to turn the Skuttle Humidifier, along with its connecting water valves off. If your indoor air is drier than the selected humidity setting, the humidistat will turn the unit's low-voltage drum motor on.
The Skuttle Model 86-UD Drum Humidifier is mountable on horizontal ducts that are 12" or wider and 8" high. It has an output capacity of 17 gallons per day (GPD) at 120 degrees Fahrenheit. Mineral buildup on the evaporator pad may require mid-season cleaning.