Endura Flap Magnet Upgrade
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The Endura Flap Magnet Upgrade can be added to any Endura pet doors to give them even better wind resistance.
This includes the Thermo Panel 3e, Endura door and wall pet doors, the Thermo Sash 3e, and Pet Door Guys sliding glass door units. This doggy door upgrade is usually not necessary, and they're a bit of a pain to install, so we suggest you try it without unless you live in an area where the wind is always blowing hard. The standard Endura Flap medium size dog door with a single flap was tested in a wind tunnel and withstood a 40 mph wind. Out of the box they are already very wind proof and energy efficient doggie doors.