Patent ID: 8650833
Filing Date: 2014-02-18
Classification: F24F

Abstract:
1. A method for covering a building venting aperture of a roof to allow air to flow therethrough, the roof having a curb around the building venting aperture, the method comprising the steps of: providing a base component having a bottom surface and a central opening; providing a top cover; mounting the top cover on the base component over the central opening to permit the air to flow through the central opening, but to exclude water from entering the central opening; providing four wall elements, each of the wall elements comprising: welding the side edges of each of the four wall elements to the end cap of the adjacent wall element, and welding the top flanges of the four wall elements to the bottom surface of the base component, to form a riser box mounted on the bottom surface of the base component; and mounting the base component onto the curb such that the base component covers the building venting aperture and the riser box fits around the curb.