https://algowiki.win/wiki/Post....:Choosing_Cat_Flap_I
A upvc-clad panel with an animal flap can help reduce the amount of draughts that your home experiences. By keeping your pets in and cold air out you can save money on heating bills. It is possible to install cat flaps into both upvc panels and double glazing glass sealed units however it can be more difficult than for doors made of timber. This is due to different thicknesses of upvc. Benefits A cat flap installed on your door allows you to keep your pet inside or outside the home, while permitting other people to enter. It a