The GeneralAire 7307 is the correct replacement cover assembly for the following humidifier models:
The GeneralAire 12859 Humidifier Cover Assembly is a replacement cover assembly for the GeneralAire Model 65 Drum Humidifier. The 12859 cover assembly includes a window and covers the 12849 humidifier cabinet. The GeneralAire 7307 is a durable replacement part for your 65 drum-type humidifier model.
GeneralAire 12859 Humidifier Cover Assembly specifications: