Air Vent adapter

Here's a completely parametric air vent adapter I made a couple of years ago.

I used to live in a double brick apartment block (cinder blocks for interior walls). As I was renting, I couldn't install a permanent air con and as I was on the top floor and the place had an iron roof, it was basically an oven in summer (Who am I kidding an Aussie summer turns just about any place into an oven)

So I procured a portable air con. Issue was that the thickness of the cinder blocks meant that the window sills got in the way of putting the vent in the window correctly.

Few hours designing and several more working out the math and I had this... then i moved out so never actually ended up making it.

I recently saw someone post something similar and it reminded me of this, so here ya go have 1 that you can make any shape you want. It has been designed to ensure no restriction of air flow but that being said don't go setting up a 10cm pipe to got through a 1 cm gap (don't think that it wo