https://mcmillan-orr-7.technet....bloggers.de/cat-flap
This double-flap cat flap that is insulated is a great protection for all climates. It can be installed in wood, uPVC, glass, and steel doors. It is essential to have a door that is sealed tightly, particularly during cold winter months. It stops warm air from being sucked out and cold air from entering which can save money on energy costs. Wind Resistance By preventing cold air from entering your home and allowing warm air in the home, a cat flap cover will keep it warmer. The be