This double-flap insulated cat flap offers good protection in different climates. It can be installed in wood, uPVC and glass doors. A tightly sealing door is essential, especially in colder weather. It stops warm air from being sucked away and cold air from entering which can save money on energy https://catflap01196.win-blog.com/10997964/installing-a-cat-flap-in-a-upvc-door-cost