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Offlinearmyabe
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HEPA
    #7554693 - 10/24/07 12:03 PM (16 years, 3 months ago)

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.


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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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Invisiblemonstermitch
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Re: HEPA [Re: armyabe]
    #7554733 - 10/24/07 12:16 PM (16 years, 3 months ago)

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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Offlinerynobot8
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Re: HEPA [Re: monstermitch]
    #7554765 - 10/24/07 12:26 PM (16 years, 3 months ago)

you could try to create a cone shape that starts at 5" and tapers out wider.


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Offlinearmyabe
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Re: HEPA [Re: rynobot8]
    #7555018 - 10/24/07 01:33 PM (16 years, 3 months ago)

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?


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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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Offlinearmyabe
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Re: HEPA [Re: armyabe]
    #7555020 - 10/24/07 01:36 PM (16 years, 3 months ago)

What would be a good design for this? and what is the best blowers to use?


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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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OfflineRogerRabbitM
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Re: HEPA [Re: armyabe]
    #7555347 - 10/24/07 02:59 PM (16 years, 3 months ago)

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


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"I've never had a failed experiment.  I've only discovered 10,000 methods which do not work."
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InvisibleBUDDHA_702
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Re: HEPA [Re: monstermitch]
    #7555349 - 10/24/07 03:00 PM (16 years, 3 months ago)

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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InvisibleJrsxt
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Re: HEPA [Re: BUDDHA_702]
    #7555412 - 10/24/07 03:14 PM (16 years, 3 months ago)

That would probably not work.


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Offlinearmyabe
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Re: HEPA [Re: BUDDHA_702]
    #7555423 - 10/24/07 03:16 PM (16 years, 3 months ago)

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.


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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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InvisibleJrsxt
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Re: HEPA [Re: armyabe]
    #7555538 - 10/24/07 03:40 PM (16 years, 3 months ago)

What are they rated at? % microns.


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Offlinearmyabe
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Re: HEPA [Re: Jrsxt]
    #7555724 - 10/24/07 04:21 PM (16 years, 3 months ago)

99.99


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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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OfflineRogerRabbitM
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Re: HEPA [Re: Jrsxt]
    #7555728 - 10/24/07 04:22 PM (16 years, 3 months ago)

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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Offlinearmyabe
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Re: HEPA [Re: RogerRabbit]
    #7555816 - 10/24/07 04:40 PM (16 years, 3 months ago)

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.


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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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Offlinearmyabe
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Registered: 09/13/07
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Re: HEPA [Re: RogerRabbit]
    #7555830 - 10/24/07 04:42 PM (16 years, 3 months ago)

the vacums have prefilters they are quite thick around 4 inches.


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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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OfflineThe shroomy 1
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Re: HEPA [Re: armyabe]
    #7560042 - 10/25/07 05:24 PM (16 years, 3 months ago)

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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