Figure 3 . An Axial Hay Drying Fan with Electric Controls Electrical requirements for the fan motor can be substantial and should be considered in the original planning process. The fan should be located where it can be easily reached for maintenance and repair, and should also be protected from the weather. Remember when selecting the fan location that it will be running continuously for a period of time and making considerable noise. Check with your supplier for an appropriate fan.
Air is forced into the duct system by the fan which delivers air throughout the hay mow.
The main air plenum is a rectangular plywood-lined air tight duct that is smooth on the interior to allow unrestricted airflow. Air control doors are located along the base of the duct walls and on top of the duct to direct air into the hay. The doors also control the airflow to different mow sections. Lined Rectangular Duct Without Slatted Floor. Courtesy Atlantic Provinces Pub.