How do I insulate a window air conditioner? Tape a plastic bag around the unit and return the outer cover. Alternatively, you can buy a fabric cover designed to fit a window AC. Place the cover right over the unit’s outside cover to protect it from precipitation like heavy rains and snow. Thankfully, the fabric covers are available in most hardware stores.
How do I make my window air conditioner weather proof?
How do you seal a window air conditioner for the winter?
How do you seal a window air conditioner gap?