The Variispeed Manual Fan Speed Controller allows you to reduce the output level of your duct fan whenever it’s appropriate, giving you an extra layer of control of your ventilation system.

• Easy to set up
• Allows you to vary the speed of your duct fan
• Helps to maintain a perfect climate
• Great build-quality

This fan speed controller is not designed for use with Isomax fans. If that’s your intention, then please take a look at the SMSCom Hybrid Controller or the Control Freak instead.