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armyabe
Mimic



Registered: 09/13/07
Posts: 240
Loc: Washington state
Last seen: 16 years, 23 days
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HEPA
#7554693 - 10/24/07 12:03 PM (16 years, 3 months ago) |
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Ok so i have access to a large quanity of Hepa filters they are curcular about 18" in diameter at intake but it filters down to around 5" as exaust. not sure if this would work for a flow hood. i was thinking that as a flow hood glove box type hybrd it would work well however i have no experiance with this. would it work or does it cause a bit of a cyclone werling cantaims around within the box has anyone made a flow hood without the traditional square filter. what if i placed a framed filter (furnace type) after the hepa to distribute air flow more evenly again i don't know. but i have confidace that someone in here knows. also i would be able to sell these filters pretty inexpensivly if someone wants to try too. thanks i'll thry to post a pic later.
-------------------- What if I am wrong, Ive got a condition, I get confused sometimes, what if I have imaged all of this, what if have finally turned into what they've always said I was gonna turn into.... a maniac...... a psycho killer.....Marv Sin City
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monstermitch
Growing in Bags Doesn't Work



Registered: 02/10/06
Posts: 3,911
Loc: Arizona Bay
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Re: HEPA [Re: armyabe]
#7554733 - 10/24/07 12:16 PM (16 years, 3 months ago) |
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glove boxes work on still air.
flowhoods require a laminar flow. created by a plenum.
so no on both.
you want the output to be at least 18" by 18" so you can have room to work in front of it.
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rynobot8
robotic messiah


Registered: 09/20/07
Posts: 60
Loc: south florida
Last seen: 15 years, 5 months
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you could try to create a cone shape that starts at 5" and tapers out wider.
-------------------- the preceding was a figment of your/my imagination, a community hallucination
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armyabe
Mimic



Registered: 09/13/07
Posts: 240
Loc: Washington state
Last seen: 16 years, 23 days
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say now that a pretty good idea do you think that it would flow out equally? can't you combine the too having hepa air inside of a glove box with continues air flow blowing hepa air out of the box?
-------------------- What if I am wrong, Ive got a condition, I get confused sometimes, what if I have imaged all of this, what if have finally turned into what they've always said I was gonna turn into.... a maniac...... a psycho killer.....Marv Sin City
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armyabe
Mimic



Registered: 09/13/07
Posts: 240
Loc: Washington state
Last seen: 16 years, 23 days
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Re: HEPA [Re: armyabe]
#7555020 - 10/24/07 01:36 PM (16 years, 3 months ago) |
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What would be a good design for this? and what is the best blowers to use?
-------------------- What if I am wrong, Ive got a condition, I get confused sometimes, what if I have imaged all of this, what if have finally turned into what they've always said I was gonna turn into.... a maniac...... a psycho killer.....Marv Sin City
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RogerRabbit
Bans for Pleasure



Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 11 months, 3 days
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Re: HEPA [Re: armyabe]
#7555347 - 10/24/07 02:59 PM (16 years, 3 months ago) |
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Quote:
What would be a good design for this?
There is none. Use a hepa filtered laminar flow hood, or a still-air glovebox. 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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BUDDHA_702
Master Mycologist In Training



Registered: 02/17/07
Posts: 1,296
Loc: Some Country
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Quote:
monstermitch said: glove boxes work on still air.
flowhoods require a laminar flow. created by a plenum.
so no on both.
you want the output to be at least 18" by 18" so you can have room to work in front of it.
What is a Plenum?
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Jrsxt
Stranger


Registered: 05/14/07
Posts: 1,043
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That would probably not work.
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armyabe
Mimic



Registered: 09/13/07
Posts: 240
Loc: Washington state
Last seen: 16 years, 23 days
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Ok so i am getting the point sorry i am a little thick headed i just want it to work. now these filters are 100 dollar industrial vacum filters(use for pulling toxic chromates out of the air). not your average vacum filter. i already explained the discription of them. my question is could i still use it? how about reverseing the flow so that it is 5" in put and 18" exaust? do you think it would work properly? if not i will continue with my search for a filter.
-------------------- What if I am wrong, Ive got a condition, I get confused sometimes, what if I have imaged all of this, what if have finally turned into what they've always said I was gonna turn into.... a maniac...... a psycho killer.....Marv Sin City
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Jrsxt
Stranger


Registered: 05/14/07
Posts: 1,043
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Re: HEPA [Re: armyabe]
#7555538 - 10/24/07 03:40 PM (16 years, 3 months ago) |
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What are they rated at? % microns.
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armyabe
Mimic



Registered: 09/13/07
Posts: 240
Loc: Washington state
Last seen: 16 years, 23 days
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Re: HEPA [Re: Jrsxt]
#7555724 - 10/24/07 04:21 PM (16 years, 3 months ago) |
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99.99
-------------------- What if I am wrong, Ive got a condition, I get confused sometimes, what if I have imaged all of this, what if have finally turned into what they've always said I was gonna turn into.... a maniac...... a psycho killer.....Marv Sin City
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RogerRabbit
Bans for Pleasure



Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 11 months, 3 days
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Re: HEPA [Re: Jrsxt]
#7555728 - 10/24/07 04:22 PM (16 years, 3 months ago) |
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It will work great for removing large dust and other airborne contaminants in your house. Just don't forget to shut it off for sterile work, as you would any fan, AC/heat, etc. and use a glovebox. That isn't a laminar flow filter, period. 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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armyabe
Mimic



Registered: 09/13/07
Posts: 240
Loc: Washington state
Last seen: 16 years, 23 days
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ok for some reason i am bound and determind to have one. how much do they cost i always see those industral ones for thousands of dollars. what gives? how cheap can i get a 24 24 flow hood. where? also, glove boxes i have always used one and never contamed anything. i just don't like it cause it seems to slow me down and it is uncomfortable. i move really slow and am alway being so careful. it takes me over an hour to do 12 jars. if i were to continuewith a box can anyone share plans for a more comfortable set up. does anyone use their alcohol lamps inside. it seems like it would be a little easier than having to go in and out all the time. how bigg can a glove box be? why not a sterial room a small bathroom, ect. oh well thanks for the help i have thus far recieved.
-------------------- What if I am wrong, Ive got a condition, I get confused sometimes, what if I have imaged all of this, what if have finally turned into what they've always said I was gonna turn into.... a maniac...... a psycho killer.....Marv Sin City
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armyabe
Mimic



Registered: 09/13/07
Posts: 240
Loc: Washington state
Last seen: 16 years, 23 days
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the vacums have prefilters they are quite thick around 4 inches.
-------------------- What if I am wrong, Ive got a condition, I get confused sometimes, what if I have imaged all of this, what if have finally turned into what they've always said I was gonna turn into.... a maniac...... a psycho killer.....Marv Sin City
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The shroomy 1
Luminous beings surround me




Registered: 03/27/07
Posts: 5,543
Loc: The Aether
Last seen: 5 months, 5 days
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Re: HEPA [Re: armyabe]
#7560042 - 10/25/07 05:24 PM (16 years, 3 months ago) |
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Hey, just because you don't have a real Laminar Flow hood doesn't mean that you can't create a workable Flow hood.. (may not create "laminar flow"), but still 100% better than nothing.
This is a link to a project I made 2 months ago. http://www.shroomery.org/forums/showflat.php/Number/7349699#7349699 I run it 24/7 and just do as RR said to do. I turn it off right before I do the sterile work. I have not had a contamination problem since! Of course, I still spray oust in the air, wear gloves, mask, and use all the other sterile procedures I would normally use. The only HUGE difference is that I DON'T HAVE TO WORK IN THE CONFINES OF A GLOVE BOX ANYMORE!
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AMU Q&A thread.
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