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Invisiblesandman420
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Re: So you're building a flowhood? [Re: sandman420]
    #26789667 - 06/28/20 12:02 PM (3 years, 7 months ago)

If the anemometer has a fan on it it is totally worthless for measuring a flowhood airspeed. Even a $160 high dollar unit has this for the accuracy 

Quote:

Β± (3%rdg + 40 ft/m)



http://www.extech.com/products/resources/AN100_UM-en.pdf

So 3% + 40 ft a min is totally worthless measurement when you are measuring 90-120 fpm. Like worse than if you just didnt measure it. Only a $500 plus hot wire anemometer is a reliable measurement of these low speeds. So basically just dont worry about it and use a lighter.


--------------------
- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed


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InvisibleStipe-n CapMDiscord
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Re: So you're building a flowhood? [Re: sandman420]
    #26789682 - 06/28/20 12:15 PM (3 years, 7 months ago)

There's no issue with placing bags or jars in the flow provided it's only 1 jar or bag deep. Once you start stacking them 2+ deep those jars/bags are now in turbulent flow. When I do g2g for example it's much more convenient to have a row of jars lined up against my filter ready to receive grain, the same is true for bags.
Otherwise I agree with what you're saying there.

Quote:

sandman420 said:
If the anemometer has a fan on it it is totally worthless for measuring a flowhood airspeed. Even a $160 high dollar unit has this for the accuracy 

Quote:

Β± (3%rdg + 40 ft/m)



http://www.extech.com/products/resources/AN100_UM-en.pdf

So 3% + 40 ft a min is totally worthless measurement when you are measuring 90-120 fpm. Like worse than if you just didnt measure it. Only a $500 plus hot wire anemometer is a reliable measurement of these low speeds. So basically just dont worry about it and use a lighter.




Ok, good to know. Thanks.


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Invisiblesandman420
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Re: So you're building a flowhood? [Re: Stipe-n Cap] * 1
    #26789690 - 06/28/20 12:18 PM (3 years, 7 months ago)

There is absolutely an issue with lining up even a wall 1 bag deep. I guarantee if you made a smoke test like this
and ran it around your bags you would be shocked. Look extra hard at 1:46 and 2:45, 5:26 will blow your titties off . I am sorry that I have not been able to convince you of this I have failed.


--------------------
- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed


Edited by sandman420 (06/28/20 12:24 PM)


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InvisibleStipe-n CapMDiscord
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Re: So you're building a flowhood? [Re: sandman420]
    #26789712 - 06/28/20 12:28 PM (3 years, 7 months ago)

So you're suggesting that g2g should be done 1 jar or bag at a time? I'm sure you can see how in that case the medicine is worse than the disease.

Excellent video btw, I'm going to add it to the OP actually...and yes I see what you're getting at but there comes a point where expedience outweighs theory. G2g, a2g cannot be achieved with any kind of volume should you be walking back and forth for single jars/bags, not only that but experience teaches us that this practice easily passes quality control.
Lining jars in laminar flow, though it produces turbulence yields more than acceptable results, as I'm sure you must be aware. Simply having master and receiving jar in the flow creates turbulence, you cannot do work in your flow without creating turbulence,  that's where sterile technique comes into play. Anything against the filter and within the margins of its flow is in laminar flow. The turbulence is created behind the object as visualized in the previously posted diagram.





Edit* by 1 deep I mean I single line in single file along the face of the filter, just to be clear.


Edited by Stipe-n Cap (06/28/20 12:40 PM)


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Invisiblesandman420
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Re: So you're building a flowhood? [Re: Stipe-n Cap]
    #26789716 - 06/28/20 12:34 PM (3 years, 7 months ago)

1 bag at a time is the most I would put in front of a 24" homemade flowhood with no sides but I have done 2 before side by side reliable. You want to leave some space between them. But the way I have my bag sealer set up it is easier to just do one anyway. Could probably do 6-8 jars I bet, but really its just easier if the whole hood is open and you are just working on one thing at a time. Grab a jar, g2g, grab a jar g2g. No big deal why even have more than one at a time. Its crowded and more clumsy. Not much benifit big deal you spun 8 lids at once....

I keep my shelf of bags right next to the hood so I just grab one, unfold, inoc, put on shelf and grab another its not so bad.

And yes theory is not reality all the time. But god damn when reality comes to bite you in the ass it suckkkkkkks my man.


--------------------
- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed


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InvisibleStipe-n CapMDiscord
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Re: So you're building a flowhood? [Re: sandman420]
    #26789735 - 06/28/20 12:42 PM (3 years, 7 months ago)

Your method is valid, I'm not saying otherwise, what I am saying however is that what I've said is standard practice and has been shown to be effective.
To each their own.


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Invisiblesandman420
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Re: So you're building a flowhood? [Re: Stipe-n Cap]
    #26789779 - 06/28/20 01:00 PM (3 years, 7 months ago)

Sorry I was trying to say I was in agreement with that it seems a lot of people are using methods that would be in theory bad practice but have success.


--------------------
- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed


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Re: So you're building a flowhood? [Re: sandman420]
    #26789791 - 06/28/20 01:05 PM (3 years, 7 months ago)

Ah, roger.:thumbup:



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InvisibleStipe-n CapMDiscord
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Re: So you're building a flowhood? [Re: gizmo1]
    #26836414 - 07/21/20 03:49 PM (3 years, 6 months ago)

Quote:

gizmo1 said:
There is alot of stuff about pairing filter and blower, not so much about choosing the filter itself.




Fixed the OP to include more of these details:cheers:


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OfflineTigerStrike
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Re: So you're building a flowhood? [Re: Stipe-n Cap]
    #27111238 - 12/27/20 07:30 PM (3 years, 1 month ago)

OOPS I'm an idiot i was reading through LAGM 20201 AND THIS AS SAME TIME

I know one thing it take a lot of work to keep a thread this busy organized, I am headed to the grocery store to pick up some mushrooms commercially to start a spore print so I am ready to compete Participate this is not a race. Or is it?!?!?!?!?!?!?!?!

Is it true this is a friendly thread where everyone does their own method each post is looked as innovative and welcome? Or is this a competition to really see who will be first to fruits?

Or is it a chill place to grow along with the community at your own pace? I am sure the top 3-4 will have friendly rivalry I am sure the noob growers will do their best and I am sure the expert growers are not gonna do bad on purpose?[/gradient]


Edited by TigerStrike (12/27/20 07:58 PM)


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Offlinehazyhorse
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Re: So you're building a flowhood? [Re: TigerStrike] * 1
    #27946153 - 09/11/22 11:48 PM (1 year, 5 months ago)

first off, thank you p9 for the thread. super sick stuff

sorry to kinda necro but

i've gotten pretty tired of working in an SAB & a flowhood sounds like absolute heaven right about now. just wanna make sure i got the math right before i drop a bunch of money.

was probably gonna go with this filter. seems like FP is a little contentious but i could not find a product even remotely close to this by searching around. if anyone has a better HEPA filter plug please lmk, but for the price this seemed like the easiest thing i could buy within my budget.

SP is listed at 1.0 on their website & if i'm doing the math right, it'll need 200-240 CFM to achieve laminar flow @ 1.0 SP? i found this blower (1tdt2) which should work right at 1.0 SP according to this chart. then i saw this comment by mushpunx:

Quote:

mushpunx said:
In case anyone is wondering the 549CFM (@ free air) blower Fungi Perfecti sells is the 1tdt2. It pushes 360CFM @ .8sp , *240CFM @ 1.0sp (*as far as I can tell reading the pixilated graph).

It works well with a 12 x 24" filter with an SP of 0.8 .
It is the blower they use in their Series 1 FH , I used it on my new 12 x 24" hood.




so it confirms what i'm thinking, but i noticed the CFM drops off a lot at 1.2 (like to 120 or something) & adding a pre-filter would obviously raise the amount of CFM i would need by quite a bit so i feel like this would be an issue with the filter i would be using. i noticed you said you don't use a pre-filter, but a lot of the DIY builds & teks i've seen seem to use them. is there any significant drawback to not using a prefilter? the other blowers seem overkill & are quite a bit more expensive, so i'd rather not have to go bigger on the blower if i don't have to, but i also don't wanna build a non-functioning hood. sorry for all the questions, i'm just having a hard time wrapping my head around the build & wanna confirm i have an OK understanding of what i need to do.


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Edited by hazyhorse (09/12/22 02:06 AM)


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Re: So you're building a flowhood? [Re: hazyhorse]
    #27946369 - 09/12/22 05:05 AM (1 year, 5 months ago)

Honestly, for the price of a fan filter unit you can't go wrong going that way instead of a diy build, however:

I've never used a prefilter, I don't really see that it's necessary but as you're aware they add resistance which has consequences greater than not running a prefilter in my opinion. People are just concerned about extending the life of their HEPA filter, your filter should last for years without a prefilter so long as you're not running it in a hay barn or something; I wouldn't worry about it.

That blower mentioned above makes it difficult to add a furnace pre filter anyways, it's a non issue from my perspective.


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Offlinehazyhorse
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Re: So you're building a flowhood? [Re: Stipe-n Cap]
    #27946890 - 09/12/22 01:56 PM (1 year, 5 months ago)

the idea of making a DIY flowhood was kind of romantic, but i think you’re right about the FFU being more worth it. after doing a few quick searches it seems to be way more worth it for something like these FFUs since before shipping & buying wood it’s gonna be like $400+ for the filter & blower alone, on top of the fact that these are 2’x2’. im glad there’s some good bang for you buck there at least

thank you for the response about the pre-filter resistances. definitely something to keep in mind if i do ever DIY a hood.


--------------------
you're not the first to set foot here, just another
===================================
i love glass petris & you can too!!
posts i constantly refer back to
new to mushroom cultivation?? read this!!
===================================

πŸ…ƒ πŸ„΄ πŸ„° πŸ„Ό    πŸ„² πŸ„» πŸ„Έ πŸ„½ πŸ„Ά πŸ…† πŸ… πŸ„° πŸ„Ώ


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Re: So you're building a flowhood? [Re: hazyhorse]
    #27947103 - 09/12/22 04:47 PM (1 year, 5 months ago)

Yeah an FFU has way to many benefits to ignore, building your own is cool I guess but an ffu is much cooler imo.


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InvisibleNextcontestant
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Re: So you're building a flowhood? [Re: Stipe-n Cap]
    #27951822 - 09/15/22 06:05 PM (1 year, 4 months ago)

Quote:

sandman420 said:
There is absolutely an issue with lining up even a wall 1 bag deep. I guarantee if you made a smoke test like this and ran it around your bags you would be shocked. Look extra hard at 1:46 and 2:45, 5:26 will blow your titties off . I am sorry that I have not been able to convince you of this I have failed.




Wow, great video!!! I've never worked in that type of environment, but learned TONS from that... 'cupping' and the pinky hold. Wouldn't of thought those little things would have a dramatic different outcome.

I have been known to preach: is it skill or equipment that will solve your problem. Video proves if you don't have skill, equipment don't matter.


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