Thermwell AC43/14 Ac Foam Weather Strip 14 Pack

Product Description

The THERMWELL AC43/14 is a gray, open-cell foam weather strip designed for sealing around window air conditioners. Each strip measures 2.25 inches wide by 2.25 inches tall by 42 inches long and compresses to fill gaps between the AC unit and the window frame. The open-cell foam construction is resilient and rebounds after compression, maintaining a consistent seal over time. This product ships in a package of 14 strips. HVAC technicians and installers use it during window AC installation to block air infiltration, insects, and dust at the unit perimeter.

This foam strip is suited for residential window air conditioner installations where the unit does not completely fill the window opening. It fits into side accordion panels or fills gaps at the top and sides of a window-mounted cooling unit. The 42-inch length accommodates a range of standard window widths. The compressible foam conforms to irregular surfaces and irregular gaps without adhesive, making it a practical solution for seasonal installations where the unit is removed and reinstalled each year.

Key Features

• Open-cell foam construction provides resilient, compressible sealing that rebounds after compression
• 2.25 x 2.25 x 42 inch dimensions suit standard window AC gap profiles
• Gray color blends with common window frame and AC unit finishes
• Seals against air infiltration, insects, and dust at the window perimeter
• Package of 14 strips covers multiple units or multiple installations
• No adhesive required — conforms to surface contact by compression fit

Compatibility

Designed for use as weather-stripping around window air conditioners in residential installations where foam infill is needed to seal gaps between the AC unit and the window frame.

Installation Notes

Installation does not require licensed trade credentials and is typically performed by a homeowner or HVAC technician during window AC setup. Power down the air conditioner before handling or repositioning the unit in the window frame. Cut the foam strip to length with scissors or a utility knife as needed to fit the opening. Avoid compressing the foam beyond its rated recovery range, as permanent deformation will reduce sealing effectiveness over time.