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ohmatic
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Registered: 02/28/04
Posts: 6,742
Loc: europe
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24x24 h14 hepa flowhood - NEW DESIGN
#5569636 - 04/29/06 05:41 AM (17 years, 9 months ago) |
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enjoy the pics, from left to right 




total cost ~ 3oo euros - time to build ~6 hrs.
the measurements and scematics, in centimeters:

1.) 64,2 x 62,2 cm 2.) 30,6 x 61,0 cm 3.) 30,0 x 61,0 cm 4.) 20,7 x 61,0 cm 5.) 78,4 x 61,0 cm 6.) 61,0 x 61,0 x 6,9 cm hepa filter 7.) 30,6 x 60,0 x 5,0 cm prefilter (had to add some little stick of wood to its side compensate the missing 1cm)
and the two sidepanels, each measuring: 64,2 x 78,4 cm.
the wood used was 16mm thick and the blower delivering 400 cfm.
silicone has been used during the entire construction in order to allow simple deconstruction (the white/grey mass).

I REDESIGNED THE MOFO !!!

its a lot tighter now
Edited by ohmatic (09/30/06 04:31 AM)
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shobimono
Why?
Registered: 09/14/04
Posts: 561
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Re: my 24x24 h14 hepa flowhood [Re: ohmatic]
#5569684 - 04/29/06 06:54 AM (17 years, 9 months ago) |
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Very nice, thanks for sharing it with us!
Is the prefilter permanently mounted in place? If yes, how would you change it?
What efficiency is your hepa? and how thick is it?
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ohmatic
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Registered: 02/28/04
Posts: 6,742
Loc: europe
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Re: my 24x24 h14 hepa flowhood [Re: shobimono]
#5569697 - 04/29/06 07:13 AM (17 years, 9 months ago) |
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Quote:
shobimono said: Is the prefilter permanently mounted in place? If yes, how would you change it?
it is, as everything else, "siliconed" into place and i would have to remove a sidepanel in order to change it - but that wont happen anytime soon 
Quote:
What efficiency is your hepa? and how thick is it?
Quote:
thread title: h14 = 99.999% / 99.997%
6.) 61,0 x 61,0 x 6,9 cm hepa filter
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MONOTUB tek HEATBOMB tek RIP #cultivation! ....can't associate? well FUCK U !
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Diploid
Cuban


Registered: 01/09/03
Posts: 19,274
Loc: Rabbit Hole
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Re: my 24x24 h14 hepa flowhood [Re: ohmatic]
#5569733 - 04/29/06 07:42 AM (17 years, 9 months ago) |
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How loud is it?
I used to have one of those small, long squirrel cage blowers in my flowhood and it made a racket. I eventually replaced it with an oversized one running more slowly to get the noise down.
-------------------- Republican Values: 1) You can't get married to your spouse who is the same sex as you. 2) You can't have an abortion no matter how much you don't want a child. 3) You can't have a certain plant in your possession or you'll get locked up with a rapist and a murderer. 4) We need a smaller, less-intrusive government.
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ohmatic
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Registered: 02/28/04
Posts: 6,742
Loc: europe
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Re: my 24x24 h14 hepa flowhood [Re: Diploid]
#5569740 - 04/29/06 07:47 AM (17 years, 9 months ago) |
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oh it isnt so bad, its not silent either, i havent got any numbers but its ok.
i simply put on my headphones while working and i cant hear anyhting
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MONOTUB tek HEATBOMB tek RIP #cultivation! ....can't associate? well FUCK U !
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RogerRabbit
Bans for Pleasure


Registered: 03/26/03
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Re: my 24x24 h14 hepa flowhood [Re: ohmatic]
#5571013 - 04/29/06 04:56 PM (17 years, 8 months ago) |
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Nice flowhood there ohm. You're right about the prefilter lasting a long time. I'm still using one I taped in place 4 years ago. It 'looks' dirty, but the truth is, a dirty air filter is a better filter than a brand new one. I'll replace it when the flow starts to reduce. I need to get me a bigger hood, still struggling with a 12 X 24. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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ohmatic
searcher


Registered: 02/28/04
Posts: 6,742
Loc: europe
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Re: my 24x24 h14 hepa flowhood [Re: RogerRabbit]
#5573157 - 04/30/06 03:11 AM (17 years, 8 months ago) |
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i went 24x24 mainly because of spawnbags, it is so much more convenient knowing that they can stand upright in the laminar flow during inoculation
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MONOTUB tek HEATBOMB tek RIP #cultivation! ....can't associate? well FUCK U !
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waixingren


Registered: 03/14/05
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Re: my 24x24 h14 hepa flowhood [Re: ohmatic]
#5576545 - 05/01/06 08:11 AM (17 years, 8 months ago) |
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you smell like poop!
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mattymonkey
Feel Like aStranger...


Registered: 11/07/04
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Re: my 24x24 h14 hepa flowhood [Re: ohmatic]
#5576553 - 05/01/06 08:17 AM (17 years, 8 months ago) |
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nice one ohm, enjoy
-------------------- "listening for the secret.. searching for the sound.."
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seti
n00b

Registered: 12/30/02
Posts: 92
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Re: my 24x24 h14 hepa flowhood [Re: ohmatic]
#5590012 - 05/04/06 01:08 PM (17 years, 8 months ago) |
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Isn't the rectangular hole you cut out too small to let all the air flow through the filter? So the sides on the hepa filter where there is no hole are essentially useless? Please fill me in.
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ohmatic
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Re: my 24x24 h14 hepa flowhood [Re: seti]
#5593032 - 05/05/06 06:30 AM (17 years, 8 months ago) |
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Quote:
seti said: Isn't the rectangular hole you cut out too small to let all the air flow through the filter? So the sides on the hepa filter where there is no hole are essentially useless? Please fill me in.

the hole i cut serves the purpose of getting air pushed through by the fan and building up pressure in the plenum behind the filter.
the sidepanels make the "box" which is pressurized and forces the air to pass through the hepa filter therefor providing laminar flow, without the panels this wouldnt be as it would just go out of the sides.
the hole just needs to be about the size of the outlet of the fan, i decided to cut it approx 0.5cm smaller than that in order to ensure a little overlap to get nice pressure in there - seals better.
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MONOTUB tek HEATBOMB tek RIP #cultivation! ....can't associate? well FUCK U !
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RogerRabbit
Bans for Pleasure


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Re: my 24x24 h14 hepa flowhood [Re: ohmatic]
#5593266 - 05/05/06 08:58 AM (17 years, 8 months ago) |
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Ohm, Are you sure that's a laminar flow filter? I've never seen one that thin. Most are three to four times that thickness and the element is made of ceramic. Don't trust the designation 'hepa' because I've seen it used even on furnace and vacuum cleaner filters before, which would not give proper filtering when under static pressure. Also, with four square feet of filter, and a 400 cfm blower, your clean air speed would be at the minimum of 100 linear feet per second leaving the fan, provided there was no loss, which is impossible. I think you're going to want to pick up a 600 cfm blower. I hope it all works out for you. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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Anno
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Re: my 24x24 h14 hepa flowhood [Re: RogerRabbit]
#5593386 - 05/05/06 09:54 AM (17 years, 8 months ago) |
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The blower delivers 400 cfm at 1" of static pressure.
Yes, it is a HEPA, class H14, 99.997% efficiency up to 0.12 micrometers particle size.
Here is the datasheet http://www.unifil.ch/Deutsch/2_sotiment/...7%20d%20neu.pdf
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ohmatic
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Registered: 02/28/04
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Loc: europe
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Re: my 24x24 h14 hepa flowhood [Re: RogerRabbit]
#5593897 - 05/05/06 12:18 PM (17 years, 8 months ago) |
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Quote:
RogerRabbit said: I've never seen one that thin.
look at pics of flowhood anno built, those filters arent thicker either:


i am also very happy with how it performs, poured plates, did transfers, inoculated grains - all stays lovely sterile
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MONOTUB tek HEATBOMB tek RIP #cultivation! ....can't associate? well FUCK U !
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hydr0420
Psycopahtic Ryda


Registered: 05/31/04
Posts: 328
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Re: my 24x24 h14 hepa flowhood [Re: waixingren]
#5594276 - 05/05/06 01:44 PM (17 years, 8 months ago) |
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Quote:
waixingren said: you smell like poop!
Agreed
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shirley knott
not my real name

Registered: 11/11/02
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Re: my 24x24 h14 hepa flowhood [Re: hydr0420]
#5594821 - 05/05/06 04:35 PM (17 years, 8 months ago) |
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he does smell poopy
-------------------- buh
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ohmatic
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Registered: 02/28/04
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Loc: europe
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love you guys too
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MONOTUB tek HEATBOMB tek RIP #cultivation! ....can't associate? well FUCK U !
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X24
pornstar


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Re: my 24x24 h14 hepa flowhood [Re: ohmatic]
#5604181 - 05/08/06 08:02 AM (17 years, 8 months ago) |
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Quote:
ohmatic said: i went 24x24 mainly because of spawnbags, it is so much more convenient knowing that they can stand upright in the laminar flow during inoculation
did somebody call my name?
-------------------- X II IV
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ohmatic
searcher


Registered: 02/28/04
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Loc: europe
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Re: my 24x24 h14 hepa flowhood [Re: X24]
#5710188 - 06/04/06 02:41 AM (17 years, 7 months ago) |
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--------------------
MONOTUB tek HEATBOMB tek RIP #cultivation! ....can't associate? well FUCK U !
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RogerRabbit
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Registered: 03/26/03
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Re: my 24x24 h14 hepa flowhood [Re: ohmatic]
#5711360 - 06/04/06 01:59 PM (17 years, 7 months ago) |
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/me gasps at the sight of fingernails near a petri dish. Wear latex gloves bro! RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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