Thermwell AC42H Ac Foam Weather Stripping 1.25x1.25x42 in

Product Description

The THERMWELL AC42H is an open-cell foam weather stripping strip designed for sealing around window air conditioners. Measuring 1.25 inches wide by 1.25 inches tall by 42 inches long, this gray compressible foam strip fills the gap between a window AC unit and the window frame. It blocks outside air infiltration, insects, and dust from entering the conditioned space. HVAC technicians and installers use it during window AC installation to create a clean, tight seal that improves unit efficiency and indoor comfort without adhesives or special tools.

This foam strip is suited for residential window air conditioner installations in single and double-hung windows. It is applied along the sides and top of the AC unit chassis where the unit meets the window sash or frame. The resilient open-cell structure compresses to conform to irregular gaps and then holds its shape to maintain the seal throughout the cooling season. It is sold in packages of 12 strips, making it practical for contractors servicing multiple units or for property managers stocking supplies for seasonal installations.

Key Features

• Open-cell foam construction compresses and rebounds to seal irregular window frame gaps
• Blocks air infiltration, insects, and dust around window AC units
• Gray color blends with standard window AC installations
• 42-inch length provides coverage for typical window AC side panels and top gaps
• 1.25 x 1.25 inch cross-section fits standard gap profiles around window unit chassis
• Packaged 12 strips per unit for multi-unit service or stock inventory

Compatibility

Designed as an OEM-style weather stripping solution for residential window-mounted air conditioner installations where foam gap sealing is required between the unit chassis and window frame.

Installation Notes

Installation is performed by HVAC technicians or qualified installers during window AC unit setup. Power down and unplug the air conditioner before working around the unit. Press the foam strip firmly into the gap between the AC chassis and the window frame or sash, allowing it to compress slightly for a snug fit. Trim excess length with a utility knife or scissors as needed to fit the specific window opening.