The Thermo Sash 3e Pet Door for Sash Windows is built for homeowners who want pet freedom without compromising the performance of their window. By integrating an insulated panel directly into the sash track, it creates a dedicated access point that works with your window rather than replacing it. Cold Weather Performance and Magnetic SealingAt the core is a flexible polyolefin polymer flap engineered to remain responsive even in temperatures down to minus 40 degrees Fahrenheit. Magnets line the edges to encourage a consistent seal in windy or cold conditions, while the resistance can be adjusted by adding or removing magnets to suit confident dogs or more cautious cats. Structured Frame and Integrated InsulationThe extruded aluminum frame offers a clean, structured appearance that pairs naturally with many window styles. Weather stripping and a top loading locking cover are included to help reduce drafts and give you control when pets need to stay inside. Installation relies on a spring loaded compression system that holds the panel securely within the sash track, making it especially practical for renters or seasonal properties. The window must open high enough to accept the full panel height, which varies by flap size. Custom and Extra Large ConfigurationsExtra Large 22 inch to 25 inch width panels are produced with plexiglass and built to order. Custom made panels are crafted to the specified dimensions and are non returnable.
