Electric fan shutters

[SHELCO]

I am looking for a new fan/ shutter combo. We have used these fans for years which allow heat to fly by in winter.
I have to update the fans and was looking for a shutter that would open when fans were turned on.
There would have to be a motor that would close vents while off. ??
Thoughts.

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[matt_i]

A "whole house fan" will typically have the shutters.

Depending on how high that is, etc, you could rig up a system to slide a piece of 3/4" ply over the opening and screw it into place. Build some rudimentary guides and it could just slide to the side over the summer.

 

[Stuart in MN]

Motorized dampers on exhaust fans are a common thing in industrial applications. You'll probably have to go to a local HVAC supply to find what you need, I don't know that the big box stores will carry them. There are a number of brands, Greenheck is the one that pops in my head at the moment. http://www.greenheck.com/

 

[SHELCO]

The fans are @20 ft in the air. I will have to start looking commercial. Thanks


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[LS6 Tommy]

You don't need powered dampers. Box out the inlet to the fan and install gravity/passive backdraft dampers.

http://www.greenheck.com/media/pdf/catalogs/BackdraftDampers_catalog.pdf

Tommy