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OfflineSoulcrusher
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Box fan flow hood
    #22390852 - 10/16/15 09:51 PM (8 years, 3 months ago)

Is this better then nothing? I would assume so. Honeywell elite allergen filter taped to the front of a 20" box fan



Edited by Soulcrusher (10/17/15 12:18 AM)


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Onlinespirit_shadow
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Re: Box fan foow hood [Re: Soulcrusher]
    #22390911 - 10/16/15 09:59 PM (8 years, 3 months ago)

A still air box is better than nothing as well.


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Re: Box fan foow hood [Re: Soulcrusher]
    #22390922 - 10/16/15 10:00 PM (8 years, 3 months ago)

I think doing nothing would literally be better than doing that.  And a 8 dollar plastic tub with holes in it for your arms would be even better.

http://www.shroomery.org/forums/showflat.php/Number/20048771#20048771


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Re: Box fan foow hood [Re: Soulcrusher]
    #22390924 - 10/16/15 10:00 PM (8 years, 3 months ago)

better than nothing?? i mean i guess…depending on how you define "nothing"

it won't be laminar, thats for sure.

if u find a hood i can build for $25 and can do plate and grain work in front of…please let me know

filtering allergens and making grain spawn are two different things.


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Re: Box fan foow hood [Re: blindingleaf]
    #22390953 - 10/16/15 10:04 PM (8 years, 3 months ago)

He said "90% reduction"  That's 10% of the particles in the air, blowing right into your work.  That's even worse than 90% of the particles in the air not blowing into your work.


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Re: Box fan foow hood [Re: Inocuole]
    #22391487 - 10/17/15 12:11 AM (8 years, 3 months ago)

I'd rather use ships in open air over that rig


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OfflineSoulcrusher
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Re: Box fan flow hood [Re: Soulcrusher]
    #22391514 - 10/17/15 12:27 AM (8 years, 3 months ago)

Was curious. The meter he showed was just sitting in open air with the high count of contaminents. By definition laminar means smooth, non turbulent. Could simple extending flaps from the front help funnel the air better? And lastly, what about running a setup like that in a small room for an hour before going in to work just to clean the environmental air conditions overall? Just for my lungs and the kiddos I put a merv 12 in the furnace for the house. Thanks for all the input fam.


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Re: Box fan flow hood [Re: Soulcrusher]
    #22391518 - 10/17/15 12:29 AM (8 years, 3 months ago)

For your lungs, hell yeah, for mycology work, probably won't make too big a difference.  Maybe a few % better success rate doing sterile work using normal precautions.  Maybe.  :shrug:

The grower is a bigger contam vector than the air though.


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Re: Box fan flow hood [Re: Inocuole]
    #22391542 - 10/17/15 12:39 AM (8 years, 3 months ago)

Has nobody here seen where RR has taped a high-efficiency air filter to a box fan and worked in front of it?
You'll probably need to do better than 90%... But my guess is a good filter that works for mold spores can do it.
Something like a schmuvbox might be even better for you... But IMO if RR says something like that can work, then for something like that I would believe it.


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InvisibleMad Season
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Re: Box fan flow hood [Re: Violet]
    #22391548 - 10/17/15 12:41 AM (8 years, 3 months ago)

I'm not bad ass like RR. :lol: my plastic box with melted coffee can holes works for me :lol: costed $10


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Re: Box fan flow hood [Re: Mad Season]
    #22391552 - 10/17/15 12:43 AM (8 years, 3 months ago)

Haha are we doing halls of shame now?  :lol:  I'd say I'm in, but, well. :thumbup:  I like how we share two ignorers, specifically ones that don't like being corrected.

Sorry, wrong thread for this.  I still don't think it's a good idea unless
A. The filter is really high quality and efficiency
B. You're a badass at FH technique.


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OfflineSoulcrusher
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Re: Box fan flow hood [Re: Violet]
    #22391556 - 10/17/15 12:44 AM (8 years, 3 months ago)

I would imagine any zone of positive pressure filtered air would be better then the crap floating wildly you see when the sun peeps through the crack in the blinds. Just thinking. Not trying to overthink.


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Re: Box fan flow hood [Re: Inocuole]
    #22391561 - 10/17/15 12:45 AM (8 years, 3 months ago)

What? What was any of that?


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Re: Box fan flow hood [Re: Soulcrusher]
    #22391570 - 10/17/15 12:47 AM (8 years, 3 months ago)

Let the sun peek through the clear walls of a still air box and see how much floaty crap is in there when your AC and fans haven't been running for 30 minutes or so.  They really work.

But.. if you have a bunch of stuff in your air do the filter thing anyway for your own benefit.  It's all around not a bad thing to have.  Breathing in visible dust all day is pretty bad.


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Re: Box fan flow hood [Re: Soulcrusher]
    #22391592 - 10/17/15 12:54 AM (8 years, 3 months ago)

Quote:

Soulcrusher said:
I would imagine any zone of positive pressure filtered air would be better then the crap floating wildly you see when the sun peeps through the crack in the blinds. Just thinking. Not trying to overthink.



Yo G that shit used to scare me when I was a little kid I was like I'm breathing THIS air? All those dust particles with fecal matter and spores and shit. Scary.


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Re: Box fan flow hood [Re: gizmo1]
    #22391609 - 10/17/15 12:58 AM (8 years, 3 months ago)

I looked around but couldn't find where RR had made the box fan filter combo.  At least I remember him saying something like that he worked only small stuff and right in the very middle of the filter, right up against it.
Oh well.  All I can say for sure is I've heard of it being done.
That, and that a Still-Air box or even a schmuvbox would be better and still inexpensive. The still-air box should even be cheaper, and it's the gold standard.


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InvisibleMad Season
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Re: Box fan flow hood [Re: Inocuole]
    #22391629 - 10/17/15 01:10 AM (8 years, 3 months ago)

Quote:

Inocuole said:
Haha are we doing halls of shame now?  :lol:  I'd say I'm in, but, well. :thumbup:  I like how we share two ignorers, specifically ones that don't like being corrected.



:rofl: oh why am I not surprised you're blocked by noobs too. I love my ignore list haha


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Edited by Mad Season (10/17/15 01:11 AM)


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OfflineKizzle
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Re: Box fan flow hood [Re: Soulcrusher]
    #22391640 - 10/17/15 01:15 AM (8 years, 3 months ago)

Quote:

Soulcrusher said:
I would imagine any zone of positive pressure filtered air would be better then the crap floating wildly you see when the sun peeps through the crack in the blinds. Just thinking. Not trying to overthink.



That thing would make the crap float wildly if it's not producing laminar flow. In a SAB contaminants move in one direction, down. So you know how to cover your work to keep them from landing in it. Same goes with laminar flow. You know which direction any contaminants will be blown.


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OfflineSoulcrusher
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Re: Box fan flow hood [Re: Kizzle]
    #22392328 - 10/17/15 09:01 AM (8 years, 3 months ago)

I have begun building a real flow hood. Having trouble getting pics up from my phone. I plan on making a vertical flow hood with sides and a plexiglass front shield like a true lab hood. Manufacturers say the vertical provides better working safety and sterilization then horizontal.



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OfflineSoulcrusher
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Re: Box fan flow hood [Re: Soulcrusher]
    #22393878 - 10/17/15 03:36 PM (8 years, 3 months ago)

Well I agree. It would be worse then nothing. Used ribbon to do a streamer test. More air comes out the back of the fan then the front. Box fans are not designed for pressure loads. But as far as the furnace goes, holy shit my house smells AMAZING!


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