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InvisibleCypressRage
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Re: Cultivation General Discussion [Re: CypressRage]
    #26012391 - 05/25/19 09:25 AM (4 years, 9 months ago)

I was going to do the unmodified tek but all my tubs are not clear. Also not 4 it's 6 holes


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OfflineApc123
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Re: Cultivation General Discussion [Re: J. Jack Flash]
    #26012461 - 05/25/19 10:24 AM (4 years, 9 months ago)

Quote:

J. Jack Flash said:
Quote:

Apc123 said:
Ok so I know next to nothing about building a flow hood so no laughing at my question lol. I was just thinking why wouldn't the blower part to a leaf blower or a hand held snowblower work for a blower to a hepa? Could one work? Would it be powerful enough?




my modestly educated opinion, almost certainly not, unless your filter surface was under one square foot, or it was a walk-behind style leaf blower. they aren't designed to blow high enough air volume thru high enough resistance.

caps is right, tho. used blower motors can be had for little or no money. the challenge there is matching the blower to the filter, since a/c motors aren't directly variable speed the way dc motors are.




Ok thanks, that's the answer I was looking for! I don't have a problem buying a new blower for my hepa but my BF friend was asking if I could use any of his blowers. He likes to tinker with things and take stuff apart and build other things so he has a couple blowers from different things and was wondering why I couldn't just use those. That's was my thought tho, that they would be powerful enough. How would I know what blower works with what/my filter? Is there any tek like things I could read that might explain that part?


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The thing about deceit is, you don't know your being deceived...

The only thing I am sure about is that I know nothing - socrates

Believe nothing you hear and half of what u see.

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InvisibleCaps McGee
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Re: Cultivation General Discussion [Re: Apc123]
    #26012466 - 05/25/19 10:28 AM (4 years, 9 months ago)

Monotubs will function without modification...

What difference are polyfil stuffed, or micropore taped holes going to make for light?
:justno:
Invest in a proper tub for proper results; just :2cents: though so :shrug:

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InvisibleCypressRage
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Re: Cultivation General Discussion [Re: Caps McGee]
    #26012481 - 05/25/19 10:40 AM (4 years, 9 months ago)

Both have nothing to do with light. But all the unmodified tubs are clear and mine are not. I could do unmodified just need to do a little work on the lid. Really no reason to go out and buy a tub when you can use what you have laying around the house.


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InvisiblePsicomb
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Re: Cultivation General Discussion [Re: CypressRage]
    #26012497 - 05/25/19 10:48 AM (4 years, 9 months ago)

I recommend just getting clear tubs because it still may have trouble with light. Maybe not tho, never tried the lid mod. Dont use anything larger than 2" for hole size unless youre okay with using a ton of micropore tape (theres no way youll be able to stuff it with poly) and more than likely having it dry out


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When we constantly pull things apart trying to see how it works, we may end up with only an understanding of how to destroy something
- nick sand

Edited by Psicomb (05/25/19 10:50 AM)

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OfflineApc123
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Re: Cultivation General Discussion [Re: CypressRage]
    #26012499 - 05/25/19 10:48 AM (4 years, 9 months ago)

Quote:

CypressRage said:
Both have nothing to do with light. But all the unmodified tubs are clear and mine are not. I could do unmodified just need to do a little work on the lid. Really no reason to go out and buy a tub when you can use what you have laying around the house.




I've done this. I just cut the middle of the lid out and put cellophane over it. Then I placed the light above it :thumbup:


--------------------
The thing about deceit is, you don't know your being deceived...

The only thing I am sure about is that I know nothing - socrates

Believe nothing you hear and half of what u see.

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InvisibleCaps McGee
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Re: Cultivation General Discussion [Re: Apc123]
    #26012505 - 05/25/19 10:52 AM (4 years, 9 months ago)

G-H-E-T-T-O
:kittylaugh:
I LIKE IT!

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InvisibleCypressRage
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Re: Cultivation General Discussion [Re: Apc123]
    #26012509 - 05/25/19 10:54 AM (4 years, 9 months ago)

Quote:

Psicomvb said:
I recommend just getting clear tubs because it still may have trouble with light. Maybe not tho, never tried the lid mod. Dont use anything larger than 2" for hole size unless youre okay with using a ton of micropore tape (theres no way youll be able to stuff it with poly) and more than likely having it dry out





Quote:

Apc123 said:
Quote:

CypressRage said:
Both have nothing to do with light. But all the unmodified tubs are clear and mine are not. I could do unmodified just need to do a little work on the lid. Really no reason to go out and buy a tub when you can use what you have laying around the house.




I've done this. I just cut the middle of the lid out and put cellophane over it. Then I placed the light above it :thumbup:





I have a two inch bit I will look for a smaller one. As for polyfill is that the same stuff in cheap sleeping bags and pillows?

As for the lid, I wasn't going to use plastic but a plexy glass and actually take my time on it to make it right.


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InvisibleJ. Jack Flash
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Re: Cultivation General Discussion [Re: Apc123]
    #26012531 - 05/25/19 11:06 AM (4 years, 9 months ago)

Quote:

Apc123 said:
Ok thanks, that's the answer I was looking for! I don't have a problem buying a new blower for my hepa but my BF friend was asking if I could use any of his blowers. He likes to tinker with things and take stuff apart and build other things so he has a couple blowers from different things and was wondering why I couldn't just use those. That's was my thought tho, that they would be powerful enough. How would I know what blower works with what/my filter? Is there any tek like things I could read that might explain that part?




matching the blower theoretically requires published engineering data from the manufacturer of the blower, and knowing the flow resistance of the filter, plus a few assumptions and some fairly simple  math.

last thread i recall about it.
https://www.shroomery.org/forums/showflat.php/Number/25944641/page/1

bod's thread on the subject
https://www.shroomery.org/forums/showflat.php/Number/25090168

as noted above and elsewhere, matching the blower practically requires cobbling some shit together and using various layers of pre-filter until the flow velocity you measure coming from the filter falls within a certain range. i recall concluding the closer to the lower end of that range, the better.


--------------------
 
the j stands for jesus.
2020 new years grow along

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OfflineApc123
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Re: Cultivation General Discussion [Re: J. Jack Flash]
    #26012545 - 05/25/19 11:10 AM (4 years, 9 months ago)

Ok thanks! I just didn't want to end up buying blower that wasn't powerful enough!


Quote:

Caps McGee said:
G-H-E-T-T-O
:kittylaugh:
I LIKE IT!




Lol I did the cellophane thing with all of my tub lids when I first started out bc I was under the impression that the lid had to be clear too not just the tub! :facepalm3: Ahhh noobness! :laugh2:

Edited by Apc123 (05/25/19 11:15 AM)

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InvisibleJ. Jack Flash
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Re: Cultivation General Discussion [Re: Apc123]
    #26012552 - 05/25/19 11:12 AM (4 years, 9 months ago)

or too powerful. do you have data on your filter?


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the j stands for jesus.
2020 new years grow along

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InvisiblebodhisattaMDiscordReddit
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Re: Cultivation General Discussion [Re: J. Jack Flash]
    #26012558 - 05/25/19 11:14 AM (4 years, 9 months ago)

Too powerful is usually not going to be a problem. Make a restricted intake. Or use a speed controller (hard on motors and most don't recommend using one at all)

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Invisiblevan hattonFacebookDiscord
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Re: Cultivation General Discussion [Re: bodhisatta]
    #26012575 - 05/25/19 11:28 AM (4 years, 9 months ago)

:whathesaid:

You should be slightly overshooting to compensate for the prefilters as well. W.g .2~


--------------------
If I ever give out misinformation please inform me so I can have the correct information. :cheers:

Tmethyl said:
Chuck Norris once roundhouse kicked a monotub that wasn't pinning fast enough. The force of the kick rearranged the genetics of the mushrooms, we now call them Penis Envy.

Caps McGee said:
:thumbsup:
Fun part is figuring out what works best for you

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InvisibleJ. Jack Flash
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Re: Cultivation General Discussion [Re: van hatton]
    #26012601 - 05/25/19 11:41 AM (4 years, 9 months ago)

depends on the filter, right? i mean a 12x18 filter matched to a larger blower could easily be too overpowered to not overheat the motor by choking the intake too far down? not sure. my garage blower overheats on hot days and it has no resistance on it.

anyway, too powerful means energy wasted as heat, probably louder, larger and heavier. better to shoot for as close to ideal as reasonably possible, plus a bit to account for filter resistance increasing over time.


--------------------
 
the j stands for jesus.
2020 new years grow along

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OfflineApc123
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Re: Cultivation General Discussion [Re: bodhisatta]
    #26012619 - 05/25/19 11:53 AM (4 years, 9 months ago)

Yea I'm not that worried about it being too strong, I'm sure ill have to mod it anyways.

Its 24×18×11.5 hepa 99.97%
Nothingchanged bought it off gimp for me :grin:



--------------------
The thing about deceit is, you don't know your being deceived...

The only thing I am sure about is that I know nothing - socrates

Believe nothing you hear and half of what u see.

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InvisibleCaps McGee
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Re: Cultivation General Discussion [Re: Apc123]
    #26012637 - 05/25/19 12:06 PM (4 years, 9 months ago)

Just restrict flow further and further until you have a flow pushing a flame at 45°, 6-8" away across the entire surface... minimal laminar will save your filter: more air passing=more particulates trapped= less consistency and increased risk of rupture... dialing it in with any blower short of a jet turbine should cause no damage to it's integrity... minimal air flow while maintaining flow across the entire face 

No numbers needed lol

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Invisiblesandman420
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Re: Cultivation General Discussion [Re: Caps McGee]
    #26012689 - 05/25/19 12:43 PM (4 years, 9 months ago)

Ideally your blower is capable of delivering 100 fpm out of the HEPA at twice the starting resistance of the HEPA, called final pressure drop. That is typically twice the starting resistance for most filters, and means it is clogged up to it's maximum. You restrict the flow via several options to get your new filter in the 100fpm range and as it loads up over time you can unrestrict the flow to keep it at 100 fpm. It may not be possible or economical to do this but much bigger is always better even if it isn't twice the resistance as necessary, because you can easily restrict the flow. My favorite and easiest way I have found is simply strips of gorilla tape placed over the inlet. They are easy to apply and easy to remove and strong enough to hold up to the flow. And you can easily add a strip to add more resistance or remove one to lower it, real simple stuff.


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- 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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Invisiblevan hattonFacebookDiscord
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Re: Cultivation General Discussion [Re: sandman420]
    #26012692 - 05/25/19 12:46 PM (4 years, 9 months ago)

That and over the years a bigger blowers with compensate for higher pressure from a dirty filter.


--------------------
If I ever give out misinformation please inform me so I can have the correct information. :cheers:

Tmethyl said:
Chuck Norris once roundhouse kicked a monotub that wasn't pinning fast enough. The force of the kick rearranged the genetics of the mushrooms, we now call them Penis Envy.

Caps McGee said:
:thumbsup:
Fun part is figuring out what works best for you

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Invisiblesandman420
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Re: Cultivation General Discussion [Re: sandman420]
    #26012696 - 05/25/19 12:49 PM (4 years, 9 months ago)

J Jack Flash: You should never have a blower operating unrestricted. It will overheat and destroy itself. They spin too fast or some shit, it's bad news. Add some resistance to it by covering at least 20% of the inlet. I bet you notice it suddenly magically moves more air at the same time.


--------------------
- 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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InvisibleJ. Jack Flash
stranger than ever.

Registered: 11/20/13
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Re: Cultivation General Discussion [Re: sandman420]
    #26012712 - 05/25/19 12:55 PM (4 years, 9 months ago)

this is where engineers get a bad rap. always thinkin too much.

:ruggedwink:

apc that filter is baller. kinda like nc.


--------------------
 
the j stands for jesus.
2020 new years grow along

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