Frost King AC Side Panel Insulation Kit vs Breeze Stop AC Insulation Side Panels

Both kits do the same job: they replace the flimsy plastic side panels on a window AC with foam that cuts noise, vibration and air leaks. The Frost King kit gives you two grey urethane panels with self-stick side channels, and owners rate it well for a simple, cut-to-fit install. The Breeze Stop kit gives you three white foam-and-vinyl panels and covers windows up to 36 inches wide, so it suits wider windows and white units. Pick Frost King for a standard window and a plain two-panel job; pick Breeze Stop if your window is wide or you want white panels to match the unit.

• Choose the Frost King kit if you have a standard-width window, want self-stick channels in the box, and prefer grey foam that hides dirt.
• Choose the Breeze Stop kit if your window is up to 36 inches wide, you want three panels, or you need white to match a white AC unit.