I printed this for my qidi I-Fast but it would likely fit on anything with an enclosure.

note this is a work in progress so far i've only printed in PLA to mostly test fit which went reasonably well i'll likely make a few subtle changes when i reprint in ABS.

This vent attaches to a 4inch Dryer Vent for a sliding window (no holes in your walls), I'm sure it would be quite easy to adapt to any variety of DIY or alternative solutions.

Secures to printer enclosure with a flange secured by magnets so its easy to remove or pops off if you forget about it.

This uses an 8026 inline blower fan i had laying around as well as 8x3mm magnets

Fasteners for the fan are 3mm screws installed from the window side so the heads are inside the tubing

The PWM Fan Controller mount snaps onto the 8026 fan motor housing (at least the one i have and fits the controller listed below)

parts list as follows

4x M3x30 screw (socket head cap screw is what i used)

PWM fan controller https://www.amazon.com/dp/B07WR4KBMF?psc=1&ref=ppx_yo2ov_dt_b_product_details

4inch Dryer Vent Window Insert https://www.amazon.com/dp/B0BXWH53M4?psc=1&ref=ppx_yo2ov_dt_b_product_details

8026 Fan (i had one laying around no idea where it came from it was 12v but doesn't matter much)

4inch flex dryer vent get the length you need (you can get this anywhere at least in north america thats really the only places i've lived)