Wanting to know if anyone has installed a cold air return above their stove and had success using it with the hvac fan? I can put one in easily but the return line and most of my duct work (all but 1 and part of 2 others) runs through the crawl space or the attic. I would probably still have to leave some of my other CAR's open or partially open as well, I think the car line that I can hook up to is a 6" or 8" insulated flex duct. Looking for my odds of making a difference before installing one in the ceiling. Don't really want to have a vent up there that isn't going to help.