panels are joined together by four l shaped corner braces 108 110 112 and 114 the respective braces are attached on the backsides of the respective panels with an appropriate adhesive or the like and are not visible inside the chamber 88 fig7 a bottom or finish ring 120 is appropriately attached to the bottom edges of the wall panels the ring 120 secures the panels in position and serves to finish around the opening that must be cut in the ceiling of the room the ring 120 can have a functional or decorative finish furthermore light sources not shown can be mounted on or recessed in the finish ring to enhance to appearance of the chute it will be appreciated that the length l of the chute can be any desired length depending upon the application the width w is limited only by the placement of the floor joists as will be explained below installation and use of the automatic window assembly of the present invention is relatively simple and inexpensive first the shingles s are pulled back or removed to expose the sheathing of roof r an opening should be marked on the outside and inside of the rook an opening h of appropriate dimensions is cut through the sheathing the opening h should be cut between trusses however the ceiling joists are cut and capped if necessary the template 5 is positioned over the opening h so that the opening 11 is square with the roof line a urethane seal may be placed between the template 5 and the roof r it.