Patent ID: 8460075

Claim:
An assembly for covering a vent of an air conditioning unit to completely block air flow, the air conditioning unit fitted through a wall, the assembly comprising: (a) four fastening structures that can be attached securely to the wall; (b) four elastic cords, each elastic cord having a U-shaped hook attachable to one of the fastening structures at one end of the elastic cord and having a free end; (c) a rigid or semi-rigid plastic cover, wherein the cover has a compressible foam along its perimeter for creating an air-tight seal between the cover and the wall, wherein the cover has a top and sides, wherein the top of the cover has two small holes close to each other in each corner of the top of the cover for insertion of the elastic cords, wherein two small holes are used to pass through the elastic cord; (d) four barrel locks, wherein each of four barrel locks is larger than each of the small holes in each corner of the top of the cover, wherein each of four a barrel locks is slideably attached to the elastic cord, wherein each of four barrel locks holds each of the elastic cords sufficiently tight to control a length of a slack of each elastic cord that projects outside the cover and to urge the cover against the wall.