The problem I would have with these is that they compromise the building envelope. I have been on jobs where these are being installed and there is no secondary protection between the exterior and interior of the living area. The tube is a 6 or 8 inch metal duct and the connection to the roof is nominal, but the cover can easily be disconnected from the tube, compromising the integrity of the seal. In hurricane force winds I would not trust the seal to prevent pressure change inside the home nullifing the protection from shutters and rated glass. Just one persons opinion. Take it for what it’s worth.