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Invisibleblindingleaf
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Re: Repeated failure with flow hood [Re: Cue]
    #22478112 - 11/04/15 07:59 PM (8 years, 2 months ago)

there is a couple builds with 12"…i think dam ion did it, and a few dudes in gourmet.

u need to make sure ur plenum is larger though…at least 12"…i would go more to account for less resistance from filter.

because my blower is more powerful than needed, even though my HEPA is only 6", i did a 14" plenum….
just saying that extra junk in the trunk helps to equalize the air before it forces its ways thru the filter


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Invisibleblindingleaf
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Re: Repeated failure with flow hood [Re: blindingleaf]
    #22478135 - 11/04/15 08:05 PM (8 years, 2 months ago)

read this

pirate swazeys build.

he uses speed controller with random blower….he is the man.  great write up.


--------------------
A few thoughts on cultivation
MICROBIAL HUSBANDRY!!!!

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Invisiblemicelio
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Re: Repeated failure with flow hood [Re: Cue]
    #22478241 - 11/04/15 08:32 PM (8 years, 2 months ago)

Quote:

Cue said:
The TDT5 is what I am running now, albeit with a 24x24x12 filter. Il have to look for a 6" I guess



This is the stats on the blower that Fungi Perfecti recommends for their 24"x24"x6" filter...

1TDU2
http://www.grainger.com/product/DAYTON-Rectangular-OEM-Blower-Without-1TDU2?functionCode=P2IDP2PCP
This blower is much cheaper on Amazon..

24"x24"x6" filter from Fungi perfecti..

24 x 24 x 5.8" Micron Filter:
http://www.fungi.com/product-detail/product/24-x-24-x-58-micron-filter.html
Very nice people to deal with.. give them a call for any questions..
:cookiemonster:


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OfflineCue
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Re: Repeated failure with flow hood [Re: micelio]
    #22478252 - 11/04/15 08:36 PM (8 years, 2 months ago)

Was curious if the blower I have now will run that 24x24x6, but fungi.com doesn't have any specs on it.


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Invisiblemicelio
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Re: Repeated failure with flow hood [Re: Cue]
    #22478293 - 11/04/15 08:47 PM (8 years, 2 months ago)

Quote:

Cue said:
Was curious if the blower I have now will run that 24x24x6, but fungi.com doesn't have any specs on it.




I suggest calling Fungi Perfecti and tell them what you have and ask for There honest opinion from them. It's worth it to get solid information and quit guessing.

Toll free US & Canada (800)780-9126
                Phone (360)426-9292

:goodluck:


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Invisibleazur
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Re: Repeated failure with flow hood [Re: micelio]
    #22478318 - 11/04/15 08:52 PM (8 years, 2 months ago)

Good luck getting answers from them. It'll just be some dumb bitch that knows nothing that'll answer. Been there, done that


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Invisiblemicelio
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Re: Repeated failure with flow hood [Re: micelio]
    #22478351 - 11/04/15 08:58 PM (8 years, 2 months ago)

Oh! Pirate Swazeys design was a very big help when I built My flow hood..
My pre-filter upper box was a little bigger. 17"x17"x17"..

Thanks Pirate Swazeys, You made my life easier. Nice illustration..


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Invisiblemicelio
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Re: Repeated failure with flow hood [Re: azur]
    #22478400 - 11/04/15 09:12 PM (8 years, 2 months ago)

Quote:

azur said:
Good luck getting answers from them. It'll just be some dumb bitch that knows nothing that'll answer. Been there, done that



Yeah your probably right.


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Invisiblemicelio
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Re: Repeated failure with flow hood [Re: micelio]
    #22478424 - 11/04/15 09:19 PM (8 years, 2 months ago)

Cue..
For now I suggest blocking the intake to the blower just to slow down the air flow..
Also work very close to your filter..


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OfflinepoofterFroth
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Re: Repeated failure with flow hood [Re: Cue]
    #22478471 - 11/04/15 09:35 PM (8 years, 2 months ago)

Quote:

Cue said:
G2g transfers have been about 25% clean, or less, while others Agar transfers have been about 75-80% clean. Sorry if that wasn't clear. This includes spore prints, syringes, and wedges to new plates.




FH specs? :jointsmile:

OP claims upwards to 80% success rate on plates, all the way thru to supposedly clean Master Jars. If it's a bunk flow his success rate up to that point should be way lower and a lot closer to his unacceptable <25% G2G.

Seems like the problem lies between Master Jar and G2, which could easily be technique related or issues with lids/filters...etc. 

Also might be helpful to know what contam your dealing with - bacteria or mold.


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Offlinemushpunx
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Re: Repeated failure with flow hood [Re: blindingleaf]
    #22478484 - 11/04/15 09:38 PM (8 years, 2 months ago)

Quote:

blindingleaf said:
there is a couple builds with 12"…i think dam ion did it, and a few dudes in gourmet.

u need to make sure ur plenum is larger though…at least 12"…i would go more to account for less resistance from filter.

because my blower is more powerful than needed, even though my HEPA is only 6", i did a 14" plenum….
just saying that extra junk in the trunk helps to equalize the air before it forces its ways thru the filter





Yea me too, my filter is 6" but I went with a 12" plenum.

Like BL said, you need a 12" plenum at least behind a filter that thick. Other than that there is no reason not to use a 12" thick HEPA and you would use the same blower for a 12" as a 6". The reason most people go with 6" is because of all the bulk


You don't need the .sp rating or whatever for your math. You just need the blower specs chart and you need to know the size of the filter, that's the only data you need. Well that and what size plenum you need.


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OfflineCue
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Re: Repeated failure with flow hood [Re: mushpunx]
    #22481988 - 11/05/15 05:06 PM (8 years, 2 months ago)

Well right now I have about a 9" plenum behind the filter. If I increase that area, is that going to help?

http://electricmotorwarehouse.com/content/Dayton/blower_specs/ITDT5.pdf Contains the blower specs


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OfflineCue
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Re: Repeated failure with flow hood [Re: Cue]
    #22481993 - 11/05/15 05:07 PM (8 years, 2 months ago)

I'm still questioning if the tdt5 has the nuts to push through the filter


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OfflineCue
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Re: Repeated failure with flow hood [Re: Cue]
    #22482012 - 11/05/15 05:11 PM (8 years, 2 months ago)

Sorry I keep adding multiple posts to reply to questions.

I'm mostly having issues with molds, looks like one of the non-trich molds. I have sfd filters on the lids. I've been working directly in front of the filter, and by directly, I mean as close as humanly possible to the face of the filter.

Also, if I block the intake to my blower, is that going to effect overall CFM and thus kill the flow rate to achieve laminar flow (although seems like I'm not getting it anyways with the small plenum).


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Offlinemushpunx
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Re: Repeated failure with flow hood [Re: Cue]
    #22482075 - 11/05/15 05:24 PM (8 years, 2 months ago)

Did you draw out the math to match your blower to your filter before you built the hood? That's the most important part.

I don't think a 9" plenum will do it. You want at least a 12" plenum for your filter but I would go a little more even.

Your filter is 24 x 24" , your blower will need to push at least 400cfm @ 1" sp. To achieve laminar flow. Actually probably at 1.2 sp , you wanna add like .2 resistance for your pre filter.

So your blower blows like 965cm @ free air.  You need to find what it blows at 1.2 sp. If its under 400cm then the blower probably isn't strong enough. If its higher you could probably increAse the plenum and choke the intake some


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Edited by mushpunx (11/05/15 05:36 PM)


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OfflineCue
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Re: Repeated failure with flow hood [Re: mushpunx]
    #22482288 - 11/05/15 06:15 PM (8 years, 2 months ago)

looks like i'm short onthe blower specs, will be working on this in the near future


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Invisiblemicelio
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Re: Repeated failure with flow hood [Re: Cue]
    #22482457 - 11/05/15 06:49 PM (8 years, 2 months ago)

Cue...
Just my opinion.. If you had a 6" deep filter instead of the 12" filter your blower would be close to ball park and you would have enough space for your plenum. I just don't see how your 12" deep filter going to give you 1" static pressure.(Laminar Flow) with your blower..

Here is some specs. on your filter I believe...

there is also this... 
Standard High Capacity
Operating AstroCel I AstroCel I HCX
Comparison 24" x 24" x 111/2" 24" x 24" x 111/2"
Rated Airflow Capacity 1450 CFM 2000 CFM
@ 1.4 in. w.g. (350 Pa) initial resistance (2465 m3/hr.) (3400 m3/hr.)
Rated Airflow Capacity 1050 CFM 1500 CFM
@ 1.0 in. w.g. (250 Pa) initial resistance (1785 m3/hr.) (2550 m3/hr.)
Service Life Ratio 1.0 2.0
@ 1000 CFM (1700 m3/hr.)

http://www.shroomery.org/forums/showflat.php/Number/16382679#16382679


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Invisiblemicelio
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Re: Repeated failure with flow hood [Re: micelio]
    #22482503 - 11/05/15 06:57 PM (8 years, 2 months ago)

RR Note:
    Some of the newer HEPA filters flow higher than we want at 1" of
    static pressure.  In these cases, you need to run at a lower static
    pressure, because you really don't want more than 100 feet per minute
    leaving your hood.

    Based on the specs above, I'd go with the 6" deep filter because it
    has higher resistance.  The resistance is what helps achieve laminar
    flow by creating pressure on the back side of the filter.  If every
    inch of the back side is under pressure, the air flows smoothly out
    the front side.

    I'd go with the 6" filter and a blower rated at 450 cfm @ 1" W.G.

http://www.shroomery.org/forums/showflat.php/Number/16376949#16376949


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Edited by micelio (11/05/15 07:01 PM)


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OfflineCue
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Re: Repeated failure with flow hood [Re: micelio]
    #22482999 - 11/05/15 08:37 PM (8 years, 2 months ago)

That was my plan. I'm trying to find a 24x24x6 filter, but FP seems to be the only location at this time. Also looking at ordering another fan.

Thankfully, there's plenty of uses for fans around on the farm, so the old one will probably be put to good use keeping the milking vacuum pump cool.


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Invisiblemicelio
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Re: Repeated failure with flow hood [Re: Cue]
    #22483272 - 11/05/15 09:27 PM (8 years, 2 months ago)

Dayton 1TDU2 PSC Blower is 249.99 at Amazon.. 70.00 dollars cheaper than FP..  http://www.fungi.com/product-detail/product/universal-blower-1040-cfm-8-sp.html

I had to block the intake a little to get the right flame angle.
The blower is probably 20% over which is good for when the filter get clog up in a few years you'll have the extra muscle. 

:thumbup:


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