Explosion/ignition proof ventilation fan and ducts

Hash and Stuff Extraction
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I’ve been looking into explosion proof fans… With yours and @DubYouSee recommendations I’ll be getting an allegro. Thanks guys!

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There the shit, it will take a straight stream of gas right into it

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How loud is it? Do you have to yell over it?

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I’d wager quieter then an explosion :wink:

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The 20” I have is definitely loud and I only have it running when I’m evacuating or see a leak or something. My friend keeps his on all the time but it would drive me nuts.

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I eun a small one with the ducting ending in front of a big one. Small is quiet but big is kinda loud but i will take ear plugs over skin graphs so there’s that

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That’s why I was asking. Wasn’t sure if it was one you could just run regularly or emergencies only

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Here’s a little demo of the sound

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Yeah I figured it’d be on the louder side. They all are. Some sound like a jet engine, some are bearable.

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How does that gas detector work, are they pricey? a diy way would be nice

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I posted a sensor that had a relay built into it in another thread give me a second and I’ll edit the link into this post
Edit: link promised Gas detection sensor CO2 CO H2 Methane Butane Propane monitor

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I like this one, been using it for 5 years no issues

the macurco GD-6
can set it up to trigger your fan and can make it as sensitive as you want .

only around $360 . but peace of mind is priceless

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Ohhhh :heart_eyes:

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I’ve been doing a lot of reading on this and noticed this on graywolfs new site 12.1 Extraction Booth and Ventilation System Design - GrayWolf's Lair

"Some regulations are also written as 100 CFM per square foot of area, so how do those compare.

An Extraction booth 8’ deep X 7’ wide x 8’ tall would require 5600 CFM (8 X 7 X 100sf) for the first, and the latter would require 5600 CFM (7 X 8 X 100)"

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It’s done by cubic feet. I found this chart that helps. https://www.wctproducts.com/spec_sheets/ventilation-chart.pdf

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What do you set the macurco gd-6 gas that it’s detecting for the lower explosive limit to? I see it defaults to methane but there’s also an option for propane and hydrogen. We’re using 70:30 butane to propane gas mix so I’d imagine we’d switch it to propane but I’m not totally sure.

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I’ve got an 8” Explosion Proof RamFan 980cfm used available in san jose, ca

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Vevor.com sells them cheap
And ducting if metal needs grounded or they have anti staic ducting as well. Cheapest iv seen