Hopefully, I'm about 2 months away from having my shop. Trying to get all the wiring for lights, DC runs, etc. planned before the drywall goes up. The room for the shop is adjacent to the garage, and I'm planning to put the cyclone in the garage, both for sound abatement, and to save space. I'm looking for a product/device/idea that will allow the air return to be closed unless the DC is running. My idea is ta have a remote controlled damper that I can open (or will open automatically) when the DC is running and shut otherwise. I'd prefer not to heat and cool my garage Is there a commercially available product, or a way to put something like this together. Thanks.

Mark