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https://koch-udsen-3.federated....journals.com/cat-fla
This double-flap insulated cat flap offers good protection in different climates. It can be installed in wood, uPVC, glass, and metal doors. It is important to have a door that can be sealed well, especially in cold winter months. It stops warm air from being sucked away and cold air from getting in which can save money on energy costs. Wind Resistance By preventing cold air entering your home and allowing warm air inside the cat flap,