[Lifetime Warranty] Window Air Conditioner Cover Indoor with Velcro Sides - Inside AC Cover for Winter - Polyester Fiber Fill Layers Insulation - 21" x 15" x 3.5" (Brown)

21" x 15" x 3.5" Window Air Conditioner Cover Indoor - Brown

Key Features

• Blocks cold drafts, dust, and debris from entering through the unit.
• Constructed with insulated, multi-layer fabric for thermal efficiency.
• Helps reduce exterior noise and vibrations.
• Features an adjustable securing system for a snug and secure fit.
• Designed for indoor use on the interior portion of a window AC unit.

Replaces / Cross-Reference Part Numbers

• This is a universal cover designed for fitment based on dimensions, not a direct replacement for a specific OEM part number.

Compatibility & Fitment

• Internal Dimensions: 21" Length x 15" Height x 3.5" Depth.
• Fits most standard window-mounted air conditioners matching these measurements.
• Commonly fits units in the 3,000 to 8,000 BTU range; verify unit dimensions for accurate fitment.

When to Replace

• Use during off-seasons when the air conditioner is not in operation.
• Replace if the cover material is torn, damaged, or has lost its insulating properties.
• Replace if the securing mechanism is broken or no longer provides a tight seal.

Installation Tips

• Ensure the air conditioner is powered off and unplugged before installation.
• Wipe the indoor surface of the AC unit clean and dry.
• Place the cover over the indoor-facing portion of the unit.
• Tighten the integrated straps or cord to create a firm seal around the unit.
• Check for and eliminate any gaps around the perimeter.
• Warning: Remove cover completely before operating the air conditioner.