comments:
Thanks for sharing! Ran to Home Depot while this was printing and got 25ft of 4" flexible ducting, and now have a much less lead filled airspace. Also purchased a larger fan to provide suction at the exhaust end of the ducting; https://www.amazon.com/dp/B07JB292JC?ref=ppx_yo2ov_dt_b_fed_asin_title
id suggest having either or both: coway room hepa filters or something similar for adjoining spaces. and in the main room, use some small ducting or whatever plus some ac infinity kit AC Infinity CLOUDLINE PRO S4,... https://www.amazon.com/dp/B07JB292JC?ref=ppx_pop_mob_ap_share like this to run dome ducting collectors from near the printers or their enclosure exhaust out a window. plus an in room hepa. ac infinity def has the best ducting. you should be able to print vent mounts for whatever diameters ducting if youre using core xy a la bambu mwchines. important detail: the larger the ducting: the quieter and more efficient the air movement. and ac infinity is worth it based on my not so cheap experiments. also lung health is real :)
For that 15 to 20 ft garage run, I would build around an AC Infinity CLOUDLINE PRO S4. Put the fan after the enclosure pulling outdoors, go double wide if IPA wash work happens inside, and treat gloves, eye protection, and respirator as separate buys.
I would solve ventilation before buying the printer: grow tent/enclosure, 4 inch duct to a window, and a quiet inline fan like the AC Infinity CLOUDLINE PRO S4. Air purifiers and an open window are not enough. Add nitrile gloves, eye protection, and a proper respirator.