The Endura Flap is safe for the environment on top of everything else the fantastic flap can do.
No tools are needed for installation mainly due to the spring loaded design which makes installation and removal doable in a matter of seconds.
The Thermo III has user adjustable magnets which allow you to change the resistance depending on you and your pets needs. It is great for when it is windy out you can adjust the magnets to be strong so the winds won’t be blowing into your home. The Doorway uses a high aspect ratio which makes it much easier for them to fit though the door and allows the door to be used with varying sized pets without any adjustments.