The GeneralAire 81-4 is the correct replacement for the following humidifier:
The GeneralAire 81-4 Humidifier Water Pan is located below the humidifier cabinet of the GeneralAire 81 Drum Humidifier. The GeneralAire brand is known by the following spelling variations: General Air, General Aire and GeneralAir. This replacement water tray is also known as part number 7092.
General Aire 81-4 Water Pan Replacement specifications:
With the General Aire 81 Drum Humidifer, a portion of the heated air from the furnace passes through a water-soaked pad where it absorbs additional moisture. It then returns it for distribution throughout the air in your home. Water is metered into the KineticFlo Trough for even distribution across the humidifier pad. Unevaporated water will drain from the bottom of your humidifier unit to prevent mineral build-up. The split drum design allows easy removal of the evaporator sleeve.