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The GeneralAire 81-9 is the correct replacement for the following humidifier:
The GeneralAire 81-9 Humidifier Open Drum End is connected to the opening end of the humidifier evaporator sleeve. This open drum end is also known as part number 7102. You will also find the GeneralAire brand under the following spelling variations: General Air, General Aire and GeneralAir.
GeneralAire 81-9 Open Drum End Replacement specifications:
The GeneralAire 81 Drum Humidifier allows a portion of the heated air from your furnace to pass through a water-soaked pad where it absorbs additional moisture then returns it for distribution throughout the air in your home. This General Aire Model 81 Humidifier enables water to be metered into the KineticFlo Trough and dispersed evenly across the pad. Unevaporated water drains from the bottom of the unit to help eliminate mineral build-up.