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Invisiblec10h12n2o
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Registered: 01/21/15
Posts: 3,200
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Re: Flow Hood [Re: bodhisatta]
    #24432633 - 06/24/17 07:27 PM (6 years, 7 months ago)

right.

op, you might be interested in my flowhood build, it is a lot different than what most people do, its patterned after real ones

i suggest modeling it in 3d first (thats what i did), sketchup is perfect and free

everything looks right to me, but model it first to save time and materials


--------------------

C10's Agar Guide + Tips and Tricks | c10's Flow Hood Build Guide


"Partial knowledge is more triumphant than complete knowledge; it takes things to be simpler than they are, and so makes its theory more popular and convincing."

"Convictions are more dangerous enemies of truth than lies"
― Friedrich Nietzsche


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Invisiblec10h12n2o
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Registered: 01/21/15
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Re: Flow Hood [Re: hamloaf]
    #24432744 - 06/24/17 08:06 PM (6 years, 7 months ago)

it depends on the area and depth of the filter in question

the point is to provide enough space to equalize the pressure over the filter face to provide laminar flow


--------------------

C10's Agar Guide + Tips and Tricks | c10's Flow Hood Build Guide


"Partial knowledge is more triumphant than complete knowledge; it takes things to be simpler than they are, and so makes its theory more popular and convincing."

"Convictions are more dangerous enemies of truth than lies"
― Friedrich Nietzsche


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Invisiblec10h12n2o
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Re: Flow Hood [Re: hamloaf]
    #24432878 - 06/24/17 09:10 PM (6 years, 7 months ago)

thats why i suggested sketchup, its free software from google, easier than anything else, great for laying out cuts, modeling, etc

id definitely consider using a metal fab, but it is by no means necessary. plus, metal is a lot harder to adjust than wood, i wouldnt use metal unless i was 10000% sure about my measurements and had everything modeled in 3d with proper tolerances

my buddy bought the massive one from FP and has it hooked up pretty nice, i should post a pic. we mainly use it for tissue culture work though

i got my filter from fp, just to be sure of the dimensions and the arrival date, but i got the blower from cl and built the rest out of wood, sheet aluminum, and plexi. mine is 24x24 and heavy as shit. it has outlets, lights, speed controller, usb quick chargers, etc built in

Quote:

Hamington Loafburg said:
Quote:

c10h12n2o said:
it depends on the area and depth of the filter in question

the point is to provide enough space to equalize the pressure over the filter face to provide laminar flow



How deep of a plenum do you think would be good for a 2x4 foot hepa with pre filters?




if im not mistaken, it depends on the thickness of the filter. if the filter is around 6" you need a plenum at least 6" deep. if the filter face is 2x4 ft, i think it just needs to have that same area of 8 sq ft. my filter was just under 6" deep so i used a plenum of 8" and have PERFECT laminar flow from edge to edge.



--------------------

C10's Agar Guide + Tips and Tricks | c10's Flow Hood Build Guide


"Partial knowledge is more triumphant than complete knowledge; it takes things to be simpler than they are, and so makes its theory more popular and convincing."

"Convictions are more dangerous enemies of truth than lies"
― Friedrich Nietzsche


Extras: Unfilter Print Post Top
Invisiblec10h12n2o
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Registered: 01/21/15
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Re: Flow Hood [Re: Crispykoot]
    #24434670 - 06/25/17 02:57 PM (6 years, 7 months ago)

typically, the weather stripping attached to the filter is supposed to be against the furring

this seal is VERY important on both the lab side and the plenum side, but the part against the furring is absolutely crucial to success

many store-bought hoods do not use the trim sandwich method of securing the filter. my build didnt either, since i patterned it off real ones. i used pins into the filter housing instead of trim to secure it

not only is it important that the weather stripping side be against the furring, ideally it should be TIGHT even compressed against it. i built my pins in a way where they would slant and provide a super tight seal which compressed the weather stripping down a few mm and ensured a perfect seal

the lab side i just secured with plexi silicone, since it was firmly held in place and i was mainly just making sure no air leaked


--------------------

C10's Agar Guide + Tips and Tricks | c10's Flow Hood Build Guide


"Partial knowledge is more triumphant than complete knowledge; it takes things to be simpler than they are, and so makes its theory more popular and convincing."

"Convictions are more dangerous enemies of truth than lies"
― Friedrich Nietzsche


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