Abstract: A housing has a base and upstanding interior and exterior side walls and end walls. A plurality of apertures are in the interior wall. The side walls are formed with outwardly facing flanges positionable upon a roof. A plurality of fans are coupled to the interior side wall in alignment with associated apertures. A power assembly includes cables coupling the fans to a source of potential whereby the fans when activated cause a flow of warm air from the attic and through the housing and through the fan and into the ridge vent and through the holes of the intermediate section and to atmosphere.