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OfflinexVadisx
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Camera93]
    #28433376 - 08/14/23 08:17 AM (5 months, 12 days ago)

...and I've smoked too much or not had enough coffee yet because I'm lost.

Blown capacitor on the FFU when it arrived. They took the return so back to UPS it goes today -- no money out of my pocket luckily.

That said, I think I'm going to wait a short while and get a proper flow hood instead of an Amazon roll-of-the-dice (which can totally work but fuck it I don't want to make the same mistake twice). Could I order the yjingrui one again? Sure. Would it come fucked up in some way? Seems likely enough that I don't want to bother with a second return.

I've seen a few recommended here.


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Thanks to everyone for sharing what they know :smile:. 165F for 24hrs.

Better Holes Tek (Use a Step Drill Bit)
Don't forget your towel: THE HITCHHIKER'S GUIDE TO THE SHROOMERY


Edited by xVadisx (08/14/23 08:52 AM)


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OfflinexVadisx
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: xVadisx]
    #28433510 - 08/14/23 09:39 AM (5 months, 11 days ago)



What does the sealant do that makes it that expensive?


--------------------
Thanks to everyone for sharing what they know :smile:. 165F for 24hrs.

Better Holes Tek (Use a Step Drill Bit)
Don't forget your towel: THE HITCHHIKER'S GUIDE TO THE SHROOMERY


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OfflinePandaskis
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: xVadisx]
    #28433522 - 08/14/23 09:46 AM (5 months, 11 days ago)

My guess is that it seals things


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OfflinexVadisx
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Pandaskis]
    #28433537 - 08/14/23 09:52 AM (5 months, 11 days ago)

Quote:

Pandaskis said:
My guess is that it seals things




But *what* things -- and does it do it naked?

Just curious.

Edit: I don't think I'm going to buy one of the Terra units but still - for knowledge! They had so many different 2x4 FFUs, lol.


--------------------
Thanks to everyone for sharing what they know :smile:. 165F for 24hrs.

Better Holes Tek (Use a Step Drill Bit)
Don't forget your towel: THE HITCHHIKER'S GUIDE TO THE SHROOMERY


Edited by xVadisx (08/14/23 12:56 PM)


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Offlinebsmyla
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: xVadisx]
    #28443227 - 08/22/23 07:52 PM (5 months, 3 days ago)

All this equipment, sanitization, sterile technique, pasteurization, etc.  Yet we can still go out into the pasture and collect and consume mushrooms growing on cow poop in the unsanitized wild outdoors where mold spores and bacteria are running rampant, with no ill effects.  Is contamination much ado about nothing?  Serious question.


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InvisibleMycolorado
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: bsmyla] * 2
    #28443244 - 08/22/23 08:13 PM (5 months, 3 days ago)

Nature grows mushrooms at one point in time when conditions are just right.  We provide the right conditions continuously and grow mushrooms all the time.


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OfflinePandaskis
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Mycolorado]
    #28443458 - 08/23/23 05:33 AM (5 months, 3 days ago)

Ever seen a full canopy on a cow pat?


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InvisibleStipe-n CapMDiscord
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: bsmyla] * 12
    #28443594 - 08/23/23 08:47 AM (5 months, 3 days ago)

Our houses are better suited to mold and bacteria, if you attempted to grow mushrooms without the proper techniques or equipment, you'd have mold and bacteria more often than not. This is evidenced by the failures of new growers.

Mushrooms are suited to their particular environmental niche, outdoors, that's why you can find them there, successfully fighting mold and bacteria.

By growing them indoors you remove their natural ability to move and fight environmental competition by providing a hospitable environment more suited to the competition; we need to provide an ecological vacuum by producing sterile media so that they can flourish unimpeded by aggressive competitors.


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InvisiblePastywhyteMDiscord
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Stipe-n Cap] * 2
    #28443626 - 08/23/23 09:17 AM (5 months, 2 days ago)

Nicely said stipe :rockon:


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InvisiblemushboyMDiscord
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Pastywhyte] * 1
    #28443749 - 08/23/23 11:37 AM (5 months, 2 days ago)

:whathesaid:

Nice fresh dose of mushcult reality. thanks stipe.


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Offlinestuckn3rd
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Stipe-n Cap]
    #28459238 - 09/05/23 08:09 AM (4 months, 21 days ago)

🙌


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OfflineGoSsu
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: stuckn3rd]
    #28461290 - 09/07/23 05:04 AM (4 months, 19 days ago)

Thanks!


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InvisibleStipe-n CapMDiscord
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: GoSsu] * 1
    #28470252 - 09/15/23 04:21 PM (4 months, 10 days ago)



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OfflineCocaineBuffet
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Stipe-n Cap]
    #28470505 - 09/15/23 09:30 PM (4 months, 10 days ago)

Dude that is actually cool.

He is also very optimistic that the world will be habitable in the next 10K years. I give it 3 or 400 years at MAX. If we don't kill each other to oblivion the sun is going to burn out before that.


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OfflineDERRAYLD
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Stipe-n Cap] * 3
    #28470654 - 09/16/23 12:34 AM (4 months, 10 days ago)

Quote:

Stipe-n Cap said:
I hope he never takes up cult :rofl:

https://www.instagram.com/reel/CwO12iYJCE9/?igshid=MzRlODBiNWFlZA==




He killed the contamination in his garage and then transported the sarcophagus in open air.
He clearly has axenic spawn.


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InvisibleStipe-n CapMDiscord
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: DERRAYLD]
    #28470680 - 09/16/23 02:25 AM (4 months, 10 days ago)

Exactly.

Let me "sterilize" this box with a laser, then drag it out into the yard on forks.

Eternal nerd box 1, bacteria 0.

I could see this guy creating some waves in the mush cult community with his Noob Goldberg machinery.



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InvisibleMicroMycelium
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Stipe-n Cap]
    #28482163 - 09/25/23 09:41 AM (4 months, 23 hours ago)

If I were to build my hood with a Hepa pre/intake filter attached to the blower, and a standard high-MERV rated workspace filter on the workside, would it be effective as effective as the reverse? (assuming the CFM provided enough pressure)

It seems financially smarter as a hepa intake filter may cost 40-60$ and MERV 24x24 filter around 40$ as well.
Comparative to larger 24x24x2 H14/H13 hepa filters costing near 200$ for the filter itself if the other way around.

Assuming the air comping it was hepa filtered, and the box containing the airflow was gasketed/sealed, there shouldn’t be anything foreign introduced before being diffused over your work area.

I see the Grainger blowers are recommned ex: 1TDT2
At around 190$ the 1TDT2 however only has a max CFM of 538.
Compared to:
$180 for AC Infinity Pro S8 with max CFM of 807
Or if strong enough, $40 gets 428 CFM with the AC Infinity Raxial S8

To save desk space with less depth on the FFU an inline duct fan would be placed laterally in the box, perpendicular to the filter like in Gordo’s knock off of 7sun’s poor man’s TEK.

Is a blower more beneficial because it can push air directly toward the filter for less turbulence compared to perpendicular airflow moving around more internally before exiting?


Edited by MicroMycelium (09/25/23 10:29 AM)


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InvisibleStipe-n CapMDiscord
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: MicroMycelium] * 2
    #28482399 - 09/25/23 01:47 PM (4 months, 19 hours ago)

See the particle filtration sampling data listed in the OP.


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InvisibleMicroMycelium
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Stipe-n Cap]
    #28482445 - 09/25/23 02:34 PM (4 months, 18 hours ago)

Quote:

Stipe-n Cap said:
Why doesn't this "budget flowhood" work? Well, remember that laminar flow is required which is the product of resistance, velocity, and geometry; furthermore the filter is not designed to filter out microscopic particles with high efficiency.

A blower attached to a filter, or set of filters, would be more aptly called a "blowhood". The particle sampling data clearly illustrates how ineffective the standard hardware store filters are when it comes to filtration efficiency.

3. The filter does not produce enough resistance and does not possess the correct internal geometry to align the airlflow into lamina.

As a result you're left with a turbulent flow machine that sucks in contaminant particles, (maybe the filter catches some of the larger debris like cat hair, etc) but ultimately blows microscopic particulate all over your work area.






Quote:

Stipe-n Cap said:
See the particle filtration sampling data listed in the OP.



I missed that part, thanks.

So if I’m interpreting this correctly,
Regardless of how clean the air is, it is the relative resistance of the filter facing your workspace that cause the turbulent internal air to diffuse into a laminar flow?

So essentially both a blower/fan can actually have much CFM even with the proper filtration, and if there isn’t enough of a pressure drop/resistance from your exhaust filter the air won’t be moving in a laminar flow?


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InvisibleStipe-n CapMDiscord
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: MicroMycelium]
    #28492797 - 10/05/23 06:21 AM (3 months, 22 days ago)

Not sure exactly what you mean, but...the internal geometry of the filter combined with the resistance it generates will produce laminar flow within a specified band of volumetric airlflow.

Too much or too little airlflow will result in turbulence, incorrect internal geometry or resistance will do the same; all of the ducks must be in a row.

This is why "cheap flowhoods" aren't flowhoods. Any filter + any blower/fan ≠ laminar or even sterile flow. More often than not, people are designing turbulent flow machines blowing non-sterile air, hence this thread :lol:


My favorite kind of "laminar flow"
Quote:

But if I glue a bunch of plastic straws together in a stack....




Nobel prize in engineering kind of stuff.


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