This is made to fit the hose of my particular make and model, of the brand “Anslut”, but I suspect it's pretty standard.
I printed in the orientation of the cover picture, with supports on the horizontal window frame bar and the little “horns” to attach the zippers to.
No other supports necessary.
There's a 0.2 mm (one layer) thick bridge covering the entire upper portion of the circular part.
This is intentional to avoid supports within, as there is quite as substantial diameter decrease above it which otherwise would be hanging in thin air.
This can easily be cut away with a carpet knife e.g.
I printed in PETG, at 0.2 mm layer height.
I wouldn't recommend anything with lower heat tolerance, as the output air is quite hot.
The author marked this model as their own original creation.