https://sciencewiki.science/wi....ki/Choosing_Cat_Flap
A cat flap can create a draught if left open. This is a challenge that many cat owners have to deal with. A draught-excluder can help reduce the amount of cold air entering the house. However an animal flap can provide better protection against the elements. Tomsgates offers a selection of cat flaps insulated and dog doors that can be used for any installation, including wall installations. The Material One of the most important aspects of a cat door is its insulation. This is what will keep cold air out and warm air in. Ins
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