First let me say what a cool site! So here's what I'm working with, I'm remodeling our Living Room and I'm adding an extreme exhaust system (my wife is letting me make a smokers room in our living room it has the ability to be closed off.) So I was thinking of installing two vents in the ceiling feeding down through the wall and into the crawl space and connect to an inline fan, then out of the house. The question, 3 out of the 4 walls are load bearing and the fourth has cold air returns and french doors so not alot of real estate there. How do I run a duct through the top plate and into the ceiling without compromising the structure, I know other trades just cut through the plate and I'm a bit leery. Any help would be great!!!