Manual variable speed controller allows you to set the amount of air delivery by simply turning a knob. Rated for 10amp max current and is 120V only.
LTL Freight Type
Available for Drop Shipment
The variable speed controller is simple to install in a standard electrical box. On my line voltage 24 fan it turns down about 50%. However, when I ran it at full turndown for an extended period the motor tripped out on thermal overload. I have not yet discovered if there is a sweet spot for extended low load operation.