The GeneralAire 727-7 is the correct replacement for the following humidifiers:
The GeneralAire 727-7 Humidifier Drum Shaft, also known as part number 7105 is part of the humidifier drum assembly. This 7105 Drum Shaft fits the GeneralAire 747 Series Humidifiers. When cleaning this drum shaft, squeeze the tabs on the green retainer clip and slide the clip off of the shaft end. The humidifier drum halves can now be separated to easily remove the evaporator sleeve. You should replace your evaporator sleeve at least once during the heating season.
GeneralAire Model 747 Humidifier Drum Shaft Replacement specifications:
The GeneralAire 747 Series Drum Humidifiers are a compact unit that mounts in the warm air supply duct when bypass or flow through installations cannot be done. This humidifier is equipped with built-in humidity control and water is metered into the KineticFlow Trough that is evenly dispersed across the pad. Unevaporated water of this General Aire Humidifier drains from the bottom of the unit to help eliminate mineral build-up.