https://mozillabd.science/wiki..../Cat_Flap_Installati
A cat flap can create a draught if it's left open. This is a challenge that many cat owners experience. A draught-excluder can help reduce the amount of cold air that enters the house. However, a cat flap can provide better protection against the elements. Tomsgates has a wide selection of dog doors insulated and cat flaps that are suitable for any type of installation that include wall installations. The Material One of the most important elements of a cat door is its insulation. This is what will keep cold air out and warm air