Brand New OEM GeneralAire GF1137L Humidifier 21.3 GPD

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GeneralAire GF 1137L Fan Power Humidifier 21.3 GPD.

The GeneralAire GF 1137 L can be mounted on the supply OR return air duct. 

Model 1137 includes the MHX3 Manual Control Duct Mount Humidistat.

A portion of the heated air from the furnace passes through a water-soaked Vapor Pad where it absorbs additional moisture and then returns for distribution throughout your home.

Unevaporated water drains from the bottom of the unit to eliminate mineral build-up.

21.3 Gal Flow-Through