Abstract: Embodiments disclose an apparatus for enclosing and insulating an opening in a structure such as an air conditioning unit mounted in a sleeve. The apparatus includes one or more layers required depending on the distance which any equipment installed in the opening extends beyond the wall surface. An embodiment for a rectangular insulating cover apparatus includes corner pieces, horizontal wall pieces, and side wall pieces. Corner pieces are configured to allow the horizontal wall pieces and side wall pieces to be slid into the corner pieces. The depth of the insertion into the corner pieces can be varied depending on the desired dimensions for the insulating cover apparatus. After cutting the top cover the required dimensions for the opening in the insulating cover apparatus, top cover corner boots and C-channels are installed on the top cover which is then pressed into place. A method for assembling and installing the same is provided, as are other aspects.

Abstract: Embodiments disclose an apparatus and system for enclosing and insulating an opening in a structure such as for an air conditioning unit or a sleeve. The apparatus includes one or more layers required depending on the distance which any equipment installed in the opening extends beyond the wall surface. An embodiment for rectangular insulating cover apparatus includes for corner pieces, for horizontal wall pieces, and for vertical wall pieces. Corner of pieces are configured to allow the horizontal wall pieces and vertical wall pieces to be slid into the corner pieces. The depth of the insertion into a corner pieces can be varied depending on the desired dimensions for the insulating cover apparatus. After cutting the top cover required dimensions for the opening in the insulating cover apparatus top cover corner boots and C-channels are installed on the top cover which is then pressed into place. A system for assembling and installing the same is provided, as are other aspects.

Abstract: Embodiments disclose an apparatus for enclosing and insulating an opening in a structure such as for an air conditioning unit or a sleeve. The apparatus includes a cover having a first section and a second section, wherein the first section is designed to be adjustable in relation to the second section; one or more insulating members positioned along an interior of the cover; two or more fasteners designed to secure the cover to an A/C unit sleeve or a structure. In another embodiment the apparatus cover is a single section and not adjustable. A method of installing the same is provided, as are other aspects.