https://aiwins.wiki/wiki/How_M....uch_Does_a_Cat_Flap_
A cat flap permits your pet to enter and go as they like. If it's not set correctly, it could allow heat escape, and let other animals into your home. Local Taskers are experienced in installing cat flaps and are able to install them quickly and safely. They will also tell you which type of cat flap is suitable for your wall or door. Security A cat flap is a great way for your pet to enter or leave the house without opening the door. Make sure that the flap is correctly fitted. This will stop burglars from using the flap to gain ac