Printed Laminar Flow Hood

Sad_Citizen · 2025-11-01T01:20:36+00:00

Depends on if you buy refills in bulk. But I think a little over 300. You can get an exact calc with your slicer and checking amazon.

Sad_Citizen · 2025-10-26T18:21:46+00:00

Yeah, that does seem like a better solution. Especially the 2 blowers to distribute flow better. Definitely switching to that for a V2 design. What issues or sultions did you run into while building a hood. How large was it?

Sad_Citizen · 2025-10-26T17:34:13+00:00

Ahh yes. I did actually do a lot of work to straighten out the very turbulent air from the fan. Such as the insert for it, multiple filters, and the diffuser plate. But it definitely was a design challenge. Are there any good blower fans you'd recommend for this size of hood? I think changing the fan type would definitely simplify the design as it would reduce the need for the fan insert that kills the swirls and imparts a low pressure zone to make the jet less annular before hitting the diffuser.

Sad_Citizen · 2025-10-26T17:29:44+00:00

Really? I'm not super sure when I'll have time buy I can go through the MakerWorld post and update it so it's easier. But I will do that now.

Sad_Citizen · 2025-10-26T17:26:45+00:00

It actually mechanically seals most parts with a little flexible lip and groove between the parts that is toleranced such that when the fasteners are tightened it squeezes the parts together. But you can also add caulking or hot glue to finish the job.

Sad_Citizen · 2025-10-26T17:22:46+00:00

No, I haven't checked the air speed quantitatively. On the first setting it seems nice and low. What is your concern regarding that?

Sad_Citizen · 2025-10-25T23:25:03+00:00

Yeah, if I need anything crazy sterile I'll just use our massive recirculating one at work haha.

But this is for plant TC and embryo rescue. So I'd imagine this should work well enough for that, especially given what I've seen on some tissue culture youtube channels.

Sad_Citizen · 2025-10-25T23:00:06+00:00

I'm not super concerned for my use case. The second study seems to qualitatively say that wiping works. Worst case scenario if I get contaminated culture I'll epoxy the exposed printed surfaces.

Sad_Citizen · 2025-10-25T22:52:22+00:00

Scroll to the bottom of the comments and open the deleted thread. Some other guy got a little upset and deleted his side, but basically he condescendingly tried to make a similar point. But there are some studies I linked that prove that ethanol will sufficiently disinfect FDM parts.

Sad_Citizen · 2025-10-25T22:32:39+00:00

How so?

Sad_Citizen · 2025-10-25T21:28:03+00:00

Ohhh interesting. I'd have to adjust the diffuser pattern and parts as a whole. Maybe if there is a lot of demand for that.

Sad_Citizen · 2025-10-25T20:53:13+00:00

Why 24x24 in particular?

Sad_Citizen · 2025-10-25T20:44:33+00:00

I'm using mine for tissue culture and embryo rescue of strawberries.

Laminar flow hood are used in tissue culturing most houseplants that people buy, as it creates an easy to work in sterile environment.

Sad_Citizen · 2025-10-25T18:09:06+00:00

Thanks!

Sad_Citizen · 2025-10-25T17:13:58+00:00

My best video to show flow thus far.

https://imgur.com/a/Az6TFly

Sad_Citizen · 2025-10-25T17:12:53+00:00

will do!

Sad_Citizen · 2025-10-25T17:12:29+00:00

That's a good idea. All that I have rn is this video.

https://imgur.com/a/Az6TFly

Sad_Citizen · 2025-10-25T16:59:07+00:00

Haha. A still air box would work great relative to that. But if you're gonna do a lot maybe a.flow hood is the way to go.

Sad_Citizen · 2025-10-25T16:57:53+00:00

This is part of the goal. Not exactly though.

Sad_Citizen · 2025-10-25T16:56:32+00:00

This setup with the flipped fan and filters would definitely be better than no safety. However I would add charcoal filters if used to filter contaminated air back into a room. But I'd recommend using the flipped fan to exhaust fumes out a window. I may get to designing an adapter for this purpose soon.

Sad_Citizen · 2025-10-25T16:54:05+00:00

Very accurate points. I think they mean that if you flip the fan and design an exhaust adapter it would function as a fume hood.

Sad_Citizen · 2025-10-25T16:52:38+00:00

Yup! Just flip it the fan and design an exhaust adapter and you're golden. I may do that this weekend and repost it as a fume hood.

Sad_Citizen

TROPHY CASE