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Furnace Humidifier
Frequently Asked Questions - Furnace Humidifiers
Furnace Hunidifier FAQ

Where is the model number located on my humidifier?

How do I get a copy of the instruction sheets?

How often do I need to change the filter?

What is the difference between a Drum and Flow Through furnace humidifier?

Can I mount my furnace humidifier on the hot air duct?

How do I order replacement parts?

 

 

Where is the model number located on my humidifier?
On most units, the model is located either on the front cover or inside the front cover.

How do I get a copy of the instruction sheets?
Instruction sheets can be downloaded from this web site. Please go to the "Product Information" section and navigate to your particular model or use the search feature at the top of the page to type in your model number.

How often do I need to change the filter?
Discoloration of the filter (evaporative pad) is normal after extended use. The discoloration is caused by mineral deposits in the water, and the degree of discoloration will vary depending upon the amount of mineral content in the water. When the filter surface area is thoroughly discolored, or you notice reduced water usage, it is a good indicator that the filter needs to be replaced. The filter should be replaced at least once every season.

What is the difference between a Drum and Flow Through furnace humidifier?
While both are mounted to your furnace, they use slightly different methods to humidify the air:
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Drum style furnace mounted humidifiers: have a round filter that uses a motor to rotate the filter within the unit. The filter "dips" into a water tray picking up the water and the air from the furnace blows through the filter to pick up the humidity. The water entering the humidifier is controlled by a float valve that only allows the amount of water the unit needs to be present.

Flow Through furnace mounted humidifier: they do not have motors. The water enters the unit through a drip pan where the filter sits under. The water flows through the drip pan into the filter, saturating the entire filter. The air from the furnace blows through the filter to pick up the humidity. Excess water is drained out through the bottom of the unit.

A Flow Through humidifier utilizes the filter to it's maximum potential and there are less components that will need to be replaced or cleaned (motors, float valves, etc.), but it will use more water than a Drum style humidifier. With a Flow Through humidifier, you will need a drain of some type for the excess water from the unit, typically if there is a floor drain close to the furnace or a sump pump, these will work well. Both are very good options for humidification.

Can I mount my furnace humidifier on the hot air duct?
NO. Furnace mounted humidifiers should always be mounted to the cold air return of your system.

How do I order replacement parts?
Replacement parts can be ordered from the parts department by calling 1-800-465-7300 Monday thru Thursday 8am to 4pm, Friday 8am to 3pm Eastern Standard Time.
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