Abstract: A system comprises a blower for moving a volume of air. A motor is operable for controlling the blower. A cooling unit is operable for cooling bearings of the blower during operation. An intake conduit is configured for passing heated air from a plenum space atop of a paint spray booth enclosure to the blower. A delivery conduit delivers the heated air to a plurality of locations within the paint spray booth enclosure. A plurality of air knifes are joined to the delivery conduit at the plurality of locations to deliver a laminar flow of the heated air into the paint spray booth. A plurality of comb devices, each joined to a one of the plurality of air knifes, are configured to disrupt the laminar flow to produce a turbulent flow in which an object within the paint spray booth enclosure is surrounded by the turbulent flow of heated air.