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Best wrap to insulate through-the-wall AC
Recently installed a through-the-wall AC in rear porch. Installers stuffed fiberglass into wall all around, caulked well inside and out, and we bought a metal cover for outside and a thick cloth cover for inside. Construction is mid-60s frame, inside walls are wood pine panels.
However, being all-metal, the AC unit conducts alot of cold, which I think might be perceived as a draft--as warm room air moves towards cold around AC especially around the AC perimeter where it comes out of the wall.
I was wondering what kind of wrap (maybe 4-6" wide) I could use to wind a few times around at the wall before I put the inside cloth cover on. (and also wouldn't look too junky like padded-tape, etc. (I also intend to affix a piece of styrofoam to the AC front under the cloth cover.)
Thanks for any answers.