Abstract: A system amd method of operation for collecting and treating entrained particulate powder arising from the delivery end housing of a printing press for coating the top surfaces of sheets, comprising a hood assembly including: an open bottom hood connecting with the top of the delivery end housing and having a top opening, an internal baffle mounted therein to form a peripheral space between the baffle sides and hood side walls and baffle edges and hood end walls, a duct having its lower end connecting with the top opening of the hood and its upper end connecting with a blower/filter assembly which draws air upwardly from the press delivery end housing through the hood peripheral space, duct and blower/filter assembly for removal of the entrained particulate powder and discharge of the treated air into the pressroom.