I've determined the exhaust method for my shop renovation but am struggling with refreshing the air when it is running. My shop is in the basement with no windows nearby. I was thinking about using something like a dryer vent to go through the wall but not sure if there is some type of damper or other method to keep out the cold air when I'm not running the exhaust. What are your thoughts on a dust collection blast gate?
Any other suggestions would be welcome.