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Frost King's side air conditioner insulating panel is a urethane foam block that fills the gap between a window AC unit and the window frame. The foam cuts down on air leakage, noise and vibration, and the included self-stick side channels hold it in place on new or replacement installs. It suits anyone with a window unit that leaves open side gaps. Compared with plain foam strips or accordion filler panels, it is thicker and denser, but it must be cut to height and only fits units whose side gaps it can span.
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These side panels fill the gaps on either side of a window air conditioner. They are made of insulating urethane foam. The foam reduces noise and vibration and saves energy by preventing air leakage.
Self-stick side channels are included, for new or replacement installation. To install, cut the foam panel and the plastic channel to the proper height. The panels fit most window units.
