https://fkwiki.win/wiki/Post:C....at_Flap_Installation
https://king-wifi.win/wiki/Window_With_Cat_Flap
This cat flap that is insulated comes with a double-flap mechanism and offers a good amount of protection for different climates. It can be fitted in wood, uPVC, glass, and metal doors. A tightly sealed door is crucial, particularly in cold weather. It prevents warm air from being sucked out and cold air from getting in which can save money on energy costs. Wind Resistance By preventing cold air from entering your home and keeping warm air inside the cat flap, it will k