The GeneralAire 7093 is the correct replacement bypass collar for the following humidifier models:
The GeneralAire 81-28-GF Humidifier Cover Assembly is a replacement cover assembly for the GeneralAire Legacy Drum Model 81 Humidifier. The 81-28-GF cover assembly includes a window and covers the 81-1 humidifier cabinet. The GeneralAire 7093 is a durable replacement part for your 81 drum-type humidifier model.
GeneralAire 81-28-GF Humidifier Cover Assembly specifications: