What are my best options in powered dampers?
I’m wondering what the options are for powered dampers meant to go on a 6 inch circular duct?
Probably what I want is normally closed, to swing open upon application of 12 or 24 volts. I’ve used them in the past – but I had a problem with unreliability. But that was a while ago.
Basically, the application is control over ventilation zones.
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A lot of units are 3-wire, designed to be used with a controller that does double-throw type switching. That way the unit is only energized when switching modes.