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eLeSDenes
Mycelium Expander




Registered: 05/25/11
Posts: 955
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Building laminar flow bood. Advice needed
#15966254 - 03/19/12 06:15 AM (12 years, 2 months ago) |
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Hello shroomies,
After years of gloveboxing and struggling with gloves, limited space and sterility I decided to invest in a hepa filter. I would like to get some advice. I have been thinking Of a 18 x 24 " sized filter it is 78 mm thick. Its filtering ability is 99.98 percent. Is it good enough? Is the size big enough? Which fan should i get for the filter. As i have counted it should be a 150 mm 625 m3/h. Is that good? I would appreciate any advice. Thank you
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bakenast
Muffen Stuffer


Registered: 03/14/11
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Re: Building laminar flow bood. Advice needed [Re: eLeSDenes]
#15970856 - 03/20/12 08:35 AM (12 years, 2 months ago) |
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get a 99.99 hepa 18x24 is big enough to work with for your build the filter needs to have a static pressure of .8-1" and tested under the range required for your build.. when you pick you blower get one that is a lil overpowered cause you can either block some of intake or stack filters but if its underpowered then your screwed,,, look at the specification chart of the blower for the CFM it pushes at 1" static pressure,, the CFM it says on the box is far more than it actually produces because its showing CFM at a static pressure of 0.. hope some of this helps..
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eLeSDenes
Mycelium Expander




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Re: Building laminar flow bood. Advice needed [Re: bakenast]
#15977171 - 03/21/12 04:03 PM (12 years, 1 month ago) |
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Thank you very much for your help. I have already bought a hepa filter. But im still looking for fan. as i have calculated i need one with 530 m3/h @ 0,8 "w.g Im browsing the websites but neither has the datasheets an information about how its operating under diffrent pressure levels. Do you know any company in the uk? Or at least europe? If i would get a fan with 630 m3/h would it be good?
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eLeSDenes
Mycelium Expander




Registered: 05/25/11
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Re: Building laminar flow bood. Advice needed [Re: eLeSDenes]
#15980228 - 03/22/12 08:35 AM (12 years, 1 month ago) |
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I have found an inline fan on ruck's website. It is a 730m3/h and i looked the graph and it says that on 200 pa the outtake is 530m3/h. My filter is a 24x18. 68mm. So it is 1.5 x 2 x 100 = 300 cfm 300 x 1.7 = 510 m3/h. My filter has 0.6 " w.g Static pressure. Around 150pa. If i get a pre filter with 0.2" or 50pa then i have to get a fan which does 510m3/h. Did i do the counting right??? Please tell me asap because i would like to get started:) thank you vry much.
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RogerRabbit
Bans for Pleasure



Registered: 03/26/03
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Loc: Seattle
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Re: Building laminar flow bood. Advice needed [Re: eLeSDenes]
#15980405 - 03/22/12 09:25 AM (12 years, 1 month ago) |
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Have you checked out Anno's website? I'm pretty sure he has sources. 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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eLeSDenes
Mycelium Expander




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Re: Building laminar flow bood. Advice needed [Re: RogerRabbit]
#15981433 - 03/22/12 01:44 PM (12 years, 1 month ago) |
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I can't find the squirrel cage blowers in uk but as i have seen on anno's website i can use an inline fan as well. Im probably gonna order from ruck. I just wanted to know if i am getting the right things. I dont wanna waste money because im buying stuff which is not even the good one. Thank you for your help. I really appreciate it.
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Eileen36
Stranger
Registered: 03/15/12
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Re: Building laminar flow bood. Advice needed [Re: eLeSDenes]
#15984240 - 03/23/12 12:37 AM (12 years, 1 month ago) |
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Thank you very much for your help. I have already bought a hepa filter. But im still looking for fan.
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Pinback
Stranger


Registered: 07/20/02
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Loc: Europe
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Re: Building laminar flow bood. Advice needed [Re: Eileen36]
#15988553 - 03/24/12 02:18 AM (12 years, 1 month ago) |
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I ordered mine from http://www.hanfburg.de/ (over five years ago though). An LTI "Rohrlüfter" of some model.
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shubrick


Registered: 06/11/10
Posts: 145
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Re: Building laminar flow bood. Advice needed [Re: Pinback]
#16077742 - 04/11/12 09:26 PM (12 years, 1 month ago) |
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I, too, and collecting components for a flow hood and am hoping for confirmation that I'm on the right track. I've done a lot of reading, and I think I have it worked out (so thanks to RR and Evil).
I've found the following filter, a Flander's nuclear, 24 x 24 x 6. I asked the seller what the resistance says on the tag (it's too blurry to make out), and the seller says resistance is .84, and its manufacturing date is 2005
I believe the Resistance is (from page 14 of the manual posted below): GG-D 24X24X5 7/8 500 CFM at 1.0 wg
I assume that the tag is more accurate. But just to make sure I understand this, a filter rated at 500 CFM with .84 resistance, that would mean I'd need a blower that that can push 500 + 20% cfm, right?
As opposed to this filter, which would require a blower that can push 1150 CFM: http://www.ebay.com/itm/Aerostar-HEPA-Filter-24-x-24-x-11-5-1150-CFM-99-97-03-Micron-p-n-77160-NEW-/330713168419?pt=LH_DefaultDomain_0&hash=item4d000a7a23#ht_3859wt_957
I've already got a pretty strong blower with 4 speed settings, and I am about to buy this filter. I just thought I would check with you all and get your opinion.
Here is the one I'm looking at:

Here are the specs According to this publication: http://flanders-csc.com/Downloads/nuclear_grade_hepa_pb2016.pdf
Nuclear Grade O-007-C-04-00-NU-13-23-GG-DU5
Special Hardware None 0 Options Filter Non-woven glass paper (boron silicate microfiber) Media 99.97% minimum efficiency 007 Pack Type Pleated flat sheet with corrugated aluminum separators C Case Material 3/4” fire-retardant plywood 04 Case Style ‘Box-Type’ Construction (for Wood Filters) 00 Pack to Case Fire-Retardant Solid Urethane NU Sealant Gasket TYPE Location Type/ Neoprene both faces Location Faceguard TYPE Location Material/ 2. 18-gauge Stainless Steel 3. both faces Location Filter 24 X 24 X 5 7/8 Size
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RogerRabbit
Bans for Pleasure



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Re: Building laminar flow bood. Advice needed [Re: shubrick]
#16078047 - 04/11/12 10:22 PM (12 years, 1 month ago) |
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That should work well. 500 cfm @ .84 is about what you want. 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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shubrick


Registered: 06/11/10
Posts: 145
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Re: Building laminar flow bood. Advice needed [Re: RogerRabbit]
#16109021 - 04/18/12 09:57 PM (12 years, 1 month ago) |
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So, it turns out that filter I lists above was only a 0.70 resistance, not 0.84 as advertised.
The seller did have a 12 x 12 x 2.875 hepa at .84 and I wonder if those work. Thoughts?
I really don't want to have to buy a filter that is 12" thick as it requires a larger plenum and I've got a small house.
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scienceguy
Instrument



Registered: 11/27/09
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Re: Building laminar flow bood. Advice needed [Re: shubrick]
#16119341 - 04/21/12 08:08 AM (12 years, 30 days ago) |
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I built this with an 18" x 24" filter. Feel free to ask questions...

http://www.shroomery.org/forums/showflat.php/Number/14771374
-------------------- "Freedom starts between the ears." Edward Abbey
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woodland_jewel
In den Gärten Pharaos


Registered: 09/07/11
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Loc: Penna
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Re: Building laminar flow bood. Advice needed [Re: scienceguy]
#16157576 - 04/29/12 09:44 PM (12 years, 22 days ago) |
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Quote:
scienceguy said: I built this with an 18" x 24" filter. Feel free to ask questions...

http://www.shroomery.org/forums/showflat.php/Number/14771374
Sexy hood, scienceguy! Nice work!
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big_herb
big vagina

Registered: 02/08/10
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Loc: the desert
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Re: Building laminar flow bood. Advice needed [Re: woodland_jewel]
#16179198 - 05/03/12 10:03 PM (12 years, 18 days ago) |
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Ya know you can can just throw a 50 gallon clear garbage bag over a thirty dollar walmart air purifier and get 100% success rate. I havn't had one contam in a g2g jar in over 200 jars. costs less than 50 bucks; the flow hood thing aint worth it imo.
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bakenast
Muffen Stuffer


Registered: 03/14/11
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Re: Building laminar flow bood. Advice needed [Re: big_herb] 2
#16194235 - 05/07/12 10:37 AM (12 years, 14 days ago) |
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that might be the worst advice ive ever read on this site
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shubrick


Registered: 06/11/10
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Re: Building laminar flow bood. Advice needed [Re: bakenast]
#16197289 - 05/07/12 09:50 PM (12 years, 14 days ago) |
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I was thinking worse advice on teh internets?
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boneynerd
Mushway! EatFresh!



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Re: Building laminar flow bood. Advice needed [Re: shubrick]
#16383217 - 06/14/12 10:23 PM (11 years, 11 months ago) |
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i recommend the one off fungi perfecti's website, for a few reasons..
1. unless you have all the tools (drill, saw, screwdriver, screws) your looking at atleast $100 overhead costs just in tools
2. its not as easy as it seems, mine took me a few days because i've never worked with wood in my life.. but i did it.. determination is key, and it does pay off trust me that flow hood is awesome.
3. expect around $450 for wood, tools, screws, sealant, fan, pre-filter, and hepa filter.. its not hard.. get creative, do some measuring and you can do it.
-------------------- "Your mama's grow was so contaminated, the shroomery got trich." -SpitballJediS "your a female, no one woulda cared you were naked,hell probably made someone's day, but I pull my balls out on a bus and im the bad guy.." -Bishlap
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worowa
Professor

Registered: 06/29/07
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Re: Building laminar flow bood. Advice needed [Re: big_herb]
#16388462 - 06/16/12 12:56 AM (11 years, 10 months ago) |
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Quote:
big_herb said: Ya know you can can just throw a 50 gallon clear garbage bag over a thirty dollar walmart air purifier and get 100% success rate. I havn't had one contam in a g2g jar in over 200 jars. costs less than 50 bucks; the flow hood thing aint worth it imo.
Big Herb, please elaborate. What air purifier did you use?
Don't worry about those who slander your comments (the 100% may have been a bit much)...people think they know it all from a bit of experience, but others have different experiences...irritates me when people don't get the collaborative nature of scientific knowledge...test their theory/proposition out before knocking it down without evidence. ( What do they prove, apart from closed minds?).
I don't use flames to sterilize my scalpels, just a wipe with an alcowipe, no contams on my petris in 3 years...some say not possible, but FFS, just sharing what works, as this person might be. And I've been re-using disposable scalpels. I do multiple species with the same scalpel, just wiping between species...yes, go ahead and think about that radical course of action...don't knock it 'till you try it.
Let's not get bogged down in dogma...before I scored a FH, I used an air purifier, which worked just fine in a dodgy set-up. And I did just fine (but a lot slower), in a Glove Box. Growing mushies is so much easier than some folks make out. Well,some species anyway.
-------------------- We are all in this together. Visit my site, forestfungi.com.au, let me know what you think.
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KaptKid
Spaced Pirate



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Re: Building laminar flow bood. Advice needed [Re: worowa]
#16390522 - 06/16/12 03:09 PM (11 years, 10 months ago) |
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I used a clear rubber maid tub with a hepa filter for a few years.
Now 
Cost $100 for hepa filter and a $100 everything else. Did have to do some hunting for supplies
-------------------- Child of the 60's, Tripping ever since.
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bakenast
Muffen Stuffer


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Re: Building laminar flow bood. Advice needed [Re: worowa]
#16390714 - 06/16/12 04:06 PM (11 years, 10 months ago) |
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I wonder why elaborate labortories dont just spend a few bucks on cheap walmart purifiers then instead out thousounds on flow hoods.. and if u think alcohol sterilizes everything dip ur finger in it and touch ur agar plate..
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Kanji
Registered: 01/04/09
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Re: Building laminar flow bood. Advice needed [Re: bakenast]
#16392071 - 06/16/12 09:27 PM (11 years, 10 months ago) |
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Quote:
bakenast said: I wonder why elaborate labortories dont just spend a few bucks on cheap walmart purifiers then instead out thousounds on flow hoods.. and if u think alcohol sterilizes everything dip ur finger in it and touch ur agar plate..
Maybe you should look at the filter efficiency and flow rates instead of wondering.
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scienceguy
Instrument



Registered: 11/27/09
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Re: Building laminar flow bood. Advice needed [Re: worowa] 1
#16402194 - 06/19/12 06:15 AM (11 years, 10 months ago) |
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Quote:
worowa said: Growing mushies is so much easier than some folks make out. Well,some species anyway.
Like trichoderma? Cobweb mold?
-------------------- "Freedom starts between the ears." Edward Abbey
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eLeSDenes
Mycelium Expander




Registered: 05/25/11
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Re: Building laminar flow bood. Advice needed [Re: bakenast]
#16605578 - 07/28/12 11:43 AM (11 years, 9 months ago) |
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if you flame sterilize your hand it works
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TheUnknownPoet
Stranger



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Re: Building laminar flow bood. Advice needed [Re: bakenast]
#17425232 - 12/20/12 11:15 PM (11 years, 4 months ago) |
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Quote:
bakenast said: I wonder why elaborate labortories dont just spend a few bucks on cheap walmart purifiers then instead out thousounds on flow hoods.. and if u think alcohol sterilizes everything dip ur finger in it and touch ur agar plate..
I think you are an imbicille.
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36fuckin5
Alchemycologist


Registered: 08/11/03
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Re: Building laminar flow bood. Advice needed [Re: big_herb]
#17425458 - 12/20/12 11:59 PM (11 years, 4 months ago) |
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Quote:
big_herb said: Ya know you can can just throw a 50 gallon clear garbage bag over a thirty dollar walmart air purifier and get 100% success rate. I havn't had one contam in a g2g jar in over 200 jars. costs less than 50 bucks; the flow hood thing aint worth it imo.
I do the same. It's worked for well over 200 jars, probably closer to 1,000. I just change the filter once in a while.
-------------------- Pat The Bunny said: A punk rock song won't ever change the world, but I can tell you about a couple that changed me. bodhisatta said: i recommend common sense and figuring it out. These are the TEKs I use. They're all as cheap and easy as possible, just like your mom.
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skippydude
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Re: Building laminar flow bood. Advice needed [Re: 36fuckin5]
#17425500 - 12/21/12 12:13 AM (11 years, 4 months ago) |
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Quote:
36fuckin5 said:
Quote:
big_herb said: Ya know you can can just throw a 50 gallon clear garbage bag over a thirty dollar walmart air purifier and get 100% success rate. I havn't had one contam in a g2g jar in over 200 jars. costs less than 50 bucks; the flow hood thing aint worth it imo.
I do the same. It's worked for well over 200 jars, probably closer to 1,000. I just change the filter once in a while.
I've done open air G2G in a non-sanitized room with success, but your not supposed to tell people your an idiot and I was a risk taking idiot when I did this, but that's just me
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eLeSDenes
Mycelium Expander




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Re: Building laminar flow bood. Advice needed [Re: skippydude]
#17426287 - 12/21/12 06:21 AM (11 years, 4 months ago) |
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I am really satisfied with the flowhood I built. I never get contaminations anymore. It is easy to work with. I think that was a good investment. I can make agar in petris without worrying about contams. I could not do that in a glovebox with 100% success. So i think this is the way to go.
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scienceguy
Instrument



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Re: Building laminar flow bood. Advice needed [Re: eLeSDenes]
#17435879 - 12/23/12 07:50 AM (11 years, 4 months ago) |
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It comes down to how much you like to worry about whether something is going to work or not. As the stakes get higher, and the investments larger, many people want to do what they can to minimize failures that are within their control.
-------------------- "Freedom starts between the ears." Edward Abbey
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eLeSDenes
Mycelium Expander




Registered: 05/25/11
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Re: Building laminar flow bood. Advice needed [Re: scienceguy]
#17435887 - 12/23/12 07:57 AM (11 years, 4 months ago) |
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Quote:
scienceguy said: It comes down to how much you like to worry about whether something is going to work or not. As the stakes get higher, and the investments larger, many people want to do what they can to minimize failures that are within their control.
Of course i like to worry about them. But what do you want to say with this? That a flowhood is totally unnecessary?
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skippydude
Myco-curious



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Re: Building laminar flow bood. Advice needed [Re: eLeSDenes]
#17435908 - 12/23/12 08:11 AM (11 years, 4 months ago) |
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I didn't realize how "necessary" a flow hood was until I got mine.
Mandatory, no.
Necessary, abso-freakin-loot-lee
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eLeSDenes
Mycelium Expander




Registered: 05/25/11
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Re: Building laminar flow bood. Advice needed [Re: skippydude]
#17435917 - 12/23/12 08:15 AM (11 years, 4 months ago) |
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Quote:
skippydude said: I didn't realize how "necessary" a flow hood was until I got mine.
Mandatory, no.
Necessary, abso-freakin-loot-lee
I can absolutely agree with you
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scienceguy
Instrument



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Re: Building laminar flow bood. Advice needed [Re: eLeSDenes]
#17435959 - 12/23/12 08:32 AM (11 years, 4 months ago) |
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I don't like to worry about them at all. That's why I built a flow hood.
-------------------- "Freedom starts between the ears." Edward Abbey
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