I wanted something to exhaust the fumes from my 3d printer so I modeled some PVC pipe fittings in fusion 360 and used them to make an enclosure that’s wrapped in vinyl. Ended up being MORE work than I thought it would be and worked LESS efficiently than I thought it would. I released the pipe fittings on printables. Here’s some images from the build:

I used a jig I found online to help make sure I was getting straigh cuts, linked here: picture of the pipes being cut

Vinyl came from shower curtains I bought at walmart: Picture of beginning to wrap vinyl

Here’s the final build. Definitely not airtight but I can audibly hear air being sucked in from the negative pressure. Picture of the final build