https://clashofcryptos.trade/w....iki/Installing_a_upv
This cat flap that is insulated comes with a double-flap mechanism and offers a good level of protection in a variety of climates. It can be fitted in wood, uPVC, glass, and steel doors. A tightly sealed door is vital, especially in colder weather. It prevents warm air from getting sucked out and cold air from entering and causing you to pay more energy costs. Wind Resistance By blocking cold air from entering your home and keeping warm air in the cat flap, it keeps it warm. The best ones come with a magnet seal an