I have created this to allow my pet to enter/exit the house while I have the air-conditioning running. I found other creations damage the door frame, so I created this to work in the original standard door latch preventing damage. It holds the door open at 120-130mm.

The model could use slight adjustments to perfect it for some uses. For example, in my images you can see the gap around the door handle however this does not cause any issues. The internal width is 35mm to fit around the door. This may need to be adjusted for other doors or tapered for a tighter fit.

Print will require supports.