https://perfectworld.wiki/wiki..../Cat_Flap_Installati
If you keep your cat's flap open, it can create draft. This is a common problem that cat owners face. A draught-exclusion device can help reduce the amount of cold air that enters the house, but the cat flap that is insulated can provide more protection from the elements. Tomsgates has a range of insulated cat flaps and dog doors that are suitable for any installation, including wall-mounted installations. The Material One of the most important elements of a cat door is its insulation. This is what will keep cold air out
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