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Damper control motor

I have a 36" whole house exhaust fan mounted in an attic dormer with a gravity damper. I want to add a damper control motor. Problem- the fan is a two speed, wired from down stairs and the damper motor needs only one input. I think I need a relay to make it work. What kind of relay is required? Thanks.

Asked by Jim Phillips
Posted Sat, 03/01/2014 - 06:57

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Jim,
I'm not an electrician. There are lots of ways to do this, I imagine. But a current-sensing relay would work:
http://www.grainger.com/category/current-sensor-relays/relays/electrical...

Answered by Martin Holladay, GBA Advisor
Posted Sat, 03/01/2014 - 15:28

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