Speed control units deliver adjustable ac fan control

ORION FANS Field adjustable OA11/22 dual channel phase control fan control product allows the user to control fan speed for single or multiple fan assemblies. Designed for use with any ac fan or fan tray, units provide precise airflow control. The 120/220Vac speed control unit efficiently allows an application engineer to specify and control fan noise, speed and air delivery precisely according to specific application requirements. http://www.orionfans.com/products/accessories