Every now and then, to “get away from it all”, I focus my attention on a Handyman project.
Here, I install an portable a/c unit in our upstairs bedroom in a window, not designed for one.
I use 3/4 plywood, a 2×3, insulation strips, some screws, glue, a jigsaw, elbow grease, metal tabs.
Just goes to show: never say never!