Sciencemadness Discussion Board

Fume Hood Exhaust Fan

Abromination - 5-5-2019 at 17:23

I've been designing a proper fumehood to replace the fume extractor I have right now, and have been looking for a good fan. So far I like the looks of this for its price, CFM and its speed controller. As I often do, I would first like a second opinion on the fan.
https://www.amazon.com/Inline-Fan-Built-Controller-Pre-Wired...
Sorry for the long link, I'm in a hurry on my phone right now.

battoussai114 - 5-5-2019 at 18:42

I'd personally use a centrifugal pump and mitigate the trouble of corrosive gases eating the motor away.

Abromination - 5-5-2019 at 20:19

Could the motor in an inline fan like this spark a fire?

Ubya - 6-5-2019 at 07:05

Quote: Originally posted by Abromination  
Could the motor in an inline fan like this spark a fire?


it's best to keep the motor outside the flow of air and corrosive/flamable gases

Abromination - 7-5-2019 at 20:03

Here is a better option, a squirl cage blower with an outer motor. My concerns involve the diameter of the input and output although the CFM is appropriate and still variable.

On another note, I was wondering what advice you guys have on baffels. For a 30x18x22 inch hood (WxLxH), what configuration would be the best? I am planning on having the fan directly on top of the hood.

Abromination - 8-5-2019 at 15:25

https://www.amazon.com/gp/aw/d/B07L5TWRVG/ref=sspa_mw_detail...

Mr. Rogers - 8-5-2019 at 18:44

Quote: Originally posted by Abromination  
https://www.amazon.com/gp/aw/d/B07L5TWRVG/ref=sspa_mw_detail...


That may not spark but the body is all metal.

Herr Haber - 9-5-2019 at 02:53

Squirel cage blowers are NOISY !

Abromination - 10-5-2019 at 08:14

Quote: Originally posted by Mr. Rogers  
Quote: Originally posted by Abromination  
https://www.amazon.com/gp/aw/d/B07L5TWRVG/ref=sspa_mw_detail...


That may not spark but the body is all metal.

I'm noy to worried about corrosion of the fan body itself, mostly just the motor itself.
That can always be fixed with a bit of work.