https://opensourcebridge.scien....ce/wiki/Cat_Flap_Fit
This double-flap cat flap that is insulated provides excellent protection in all climates. It can be fitted in wood, uPVC, glass, and metal doors. It is crucial to have a door that seals tightly, especially during colder weather. It can prevent warm air from being sucked away and cold air getting in, saving you money on energy costs. Wind Resistance By preventing cold air entering your home and allowing warm air inside the , it keeps it warm. The majority of the top options are insulated and have a magnetic seal to stop dra