This forced air deflector is used as an attachment to a central heating and cooling system.Simply attach to the air duct with magnets and it will redirect the flow of hot or cold air. Size to fit your application and the magnets you have, print and assemble with rigid plastic sheet. Can be customized for all vents in all locations: floor, wall or ceiling. BOM 2 cylindrical magnets 1 sheet rigid material size for vents print 2 of the sides glue or epoxy to hold magnets in - if you don't make them press fit.