The Skuttle A05-1721-042 is the correct replacement drum motor for the following humidifier models:
The Skuttle 24V Humidifier Drum Motor A05-1721-042 is a replacement drum motor for several Skuttle model humidifiers, including the 45, 86, 90, and 190. This 24 volt drum motor is also compatible with the White Rodgers HDT2600 model humidifier. The Skuttle A05-1721-042 is a genuine Skuttle humidifier replacement part that will have your humidifier operating at peak efficiency.
Skuttle 24V Humidifier Drum Motor A05-1721-042 specifications: