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If you leave your cat flap open, it can create a draft. is a common issue experienced by cat owners. A draught excluder can help reduce the amount of cold air that enters the house, but an animal flap with insulation will provide more protection from the elements. Tomsgates has a range of insulated cat flaps and dog doors that are suitable for any type of installation including wall installations. The Material Insulation is one of the most important aspects of a cat-door. This is what will keep cold air out and warm air in. T