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zachv15165
Stranger
Registered: 12/15/08
Posts: 4
Last seen: 15 years, 3 months
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laminar flow hood - getting started
#9438481 - 12/15/08 05:31 PM (15 years, 3 months ago) |
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hey everyone,
im new to the shroomery community but have always been checkin out the helpful teks and galleries. im somewhat of a noob when it comes to cultivation, only growing a few times about a year ago. i used the pf tek but in place of brown rice flour i chose to use white wheat grain with decent outcomes. i wanted higher yields but was afraid to case in a cropping container because i never had a flow hood to help prevent contaminates. not only that but i now want to isolate strains as well.
i hear that a good laminar flow hood should, @ .75"-1.00" static pressure, flow 100 cfm.
i purchased a couple things last week to build my first flow hood and what i am wondering is if my filter/blower combo will work. could someone look up each and confirm if it will or wont work:
filter - http://blueairstore.com/product/689122000411.html blower - http://www.grainger.com/Grainger/items/1TDR9
i have a feeling the blower isnt going to push enough air. also, if anyone has proven parts of similar dimensions, let me know. all of your help is greatly appreciated.
zachv
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J3illy
Trainee
Registered: 10/18/08
Posts: 3,344
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Re: laminar flow hood - getting started [Re: zachv15165]
#9438497 - 12/15/08 05:35 PM (15 years, 3 months ago) |
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Did you just guess on the blower? I don't know much about building hoods, but you should have waited to find out what you need for your filter specifically. Who knows, maybe it's right tho.
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SuchSmartMonkeys
mycologically driven individual
Registered: 10/26/05
Posts: 1,154
Last seen: 3 years, 1 month
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Re: laminar flow hood - getting started [Re: zachv15165]
#9438558 - 12/15/08 05:44 PM (15 years, 3 months ago) |
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no matter what the static pressure is, your flow should equal 100 feet per minute (FPM). The static pressure will affect how much feet per minute your blower must put out (the higher the static pressure, the more initial FPM you will need from your blower to attain 100 FPM).
your blower and your filter should have data sheets on the static pressure, and charts on the static pressure compared to how much air you need to push through it to get the desired output.
i'm gonna point you towards this site http://www.fungifun.org/English/Flowhood and tell you to scroll halfway down, and do your own homework...
-------------------- [url=http:
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Mephistophelian
Quasi Hob-Nobbery
Registered: 08/14/08
Posts: 2,527
Loc: Camp Crystal Lake
Last seen: 1 year, 29 days
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Re: laminar flow hood - getting started [Re: J3illy]
#9438579 - 12/15/08 05:46 PM (15 years, 3 months ago) |
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That filter is built for an air cleaner for a room, not for a laminar flow. There's lots of converation about Laminar Flow but, you need a specific amount of static pressure generated by the filter (back pressure) and to create a laminar flow.
This filter will just blow a heck of alot of turbulant clean air which really isn't nearly as good as a laminar flow hood. Its equivalent to sitting in front of a Room Air Purifier. So yes its a cleaner option but its nothing to a Laminar Flow Hood and your going to run into issues off and on using it. I've heard of guys using "homemade flow hoods" so I can't say how well/poor they work but, personally I'd go with a glovebox (still air) or build a Laminar Flow Hood properly.
http://www.fungifun.org/English/Flowhood
Edited by Mephistophelian (12/15/08 05:53 PM)
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musher_420
Stranger
Registered: 08/01/05
Posts: 2,691
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Re: laminar flow hood - getting started [Re: zachv15165]
#9438598 - 12/15/08 05:48 PM (15 years, 3 months ago) |
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It is not volume of air you wish to move - 100 cfm (cubic feet per minute) you are trying to achieve. It is an air SPEED of 100 feet per minute. Since your filter is approximately 2.5 cubic feet you will need a blower that will blow about 250 cfm at the static pressure of the hepa and pre-filter combined.
If we look at the details on that blower at only .6" static pressure the output drops to 50 cfm. Not suitable.
Also I don't know if that filter will work. It is only 6" thick and may not be designed for laminar flow.
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Mephistophelian
Quasi Hob-Nobbery
Registered: 08/14/08
Posts: 2,527
Loc: Camp Crystal Lake
Last seen: 1 year, 29 days
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Re: laminar flow hood - getting started [Re: musher_420]
#9438648 - 12/15/08 05:54 PM (15 years, 3 months ago) |
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Laminar flow HEPA's are pleated.
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