Vortex Dial-A-Temp

Specially designed for controlling the speed of inline, mixed-flow and centrifugal ventilation fans. Save cash and energy too—simply turn Dial-A-Temp to your desired speed for extraction of warm air from growrooms and lighting systems. Exclusive features: easy installation with dual plug-in and ground socket. UL-recognized components, factory tested. Modern design with rugged fire retardant enclosure.