Sorry for the blurry picture, but I figured I’d chime in because I did this. I modified the official H2D Smoke Ventilation Pipe Quick-release Assembly to:
- Fit a 150mm duct for a window-mounted exhaust system I bought off Amazon
- Add holes for constant negative pressure ventilation without forcibly trying to suck air out of the H2D chamber
I used M3 x 18 screws.
The duct goes from the adapter to an inline fan on the window that’s always on low. I “tuned” it by holding a tissue to the holes on the side of the adapter and lowering the fan to just above where the tissue would fall, as I don’t want to constantly vent my heat outside either.
I’ve been using this system for about a month now and the ASA printing smells are noticeably lower, and none of my prints have been affected (I’ve printed some of the same tall/large PETG and ASA prints before/after the system).
In addition to that, I also printed custom shims to increase the fit for my exhaust system in the window.
