Ventilator assembly

摘要

A foundation ventilator assembly that includes a housing in which are received at least one, and preferably a plurality of pivotal louver type elements that may be moved from an open to a closed position. In a preferred arrangement the plurality of louvers are interconnected to move as a unit and the unit is controlled by a temperature responsive bi-metalic spring to open or close the louvers depending upon the ambient temperature. A first grill is provided and is permanently secured to a side of the ventilator that will be presented as the outside during use with the grill having a screen thereacross. A second grill is provided and is removably securable to the rear side of the ventilator housing with the second screen having a grid across the ventilator opening through the housing with a screen secured thereto. The second grill is preferably manufactured of unitary construction of a thermally deformable plastic material and has a plurality of projections extending outwardly therefrom over which a screen is placed. After placement of the screen the projections are thermally deformed to unite the screen to the grill. The second, removable grill is provided with flanges along two sides to be received within the housing and afford further rigidity to the ventilator assembly. The ventilator housing and/or grill are provided with mating connections for frictional engagement therebetween.