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 Some of these posts are very old and might contain outdated information. You may wish to search for newer posts instead.
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 Seuss
Error: divide byzero
Registered: 04/27/01
Posts: 23,480
Loc: Caribbean
Last seen: 23 days, 8 hours
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 Re: Flowhood construction questions  [Re: Raadt]
#1200463 - 01/08/03 10:17 AM (21 years, 8 months ago) |
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One last thing you might consider is putting an UV-C lamp between the blower and the filter. Any 'nasties' that get trapped in the filter get killed quickly by the UV-C which also helps extend the life of your filter.
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Just another spore in the wind.
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Seuss
Error: divide byzero
Registered: 04/27/01
Posts: 23,480
Loc: Caribbean
Last seen: 23 days, 8 hours
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Re: Flowhood construction questions [Re: Anno]
#1200503 - 01/08/03 10:26 AM (21 years, 8 months ago) |
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Anno, does the airflow change directions in your flowhood before it hits the filter? From this pictures, it doesn't appear so. If it does not, the air pressure will not be even across the filter causing one area of the filter to blowout before the rest. You really want to have the high pressure air from the blower enter from the top or side (relative to the filter), not from directly behind the filter.
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Just another spore in the wind.
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Anno
Experimenter
Registered: 06/17/99
Posts: 24,167
Loc: my room
Last seen: 1 month, 1 day
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Re: Flowhood construction questions [Re: Seuss]
#1200522 - 01/08/03 10:29 AM (21 years, 8 months ago) |
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>From this pictures, it doesn't appear so.
From which pictures exactly? I posted like 3 sets of pictures in this thread....
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Raadt
nicht
Registered: 06/07/02
Posts: 2,107
Loc: azurescending
Last seen: 5 years, 4 months
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Re: Flowhood construction questions [Re: Seuss]
#1200534 - 01/08/03 10:31 AM (21 years, 8 months ago) |
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He stated that he had the air coming in through a tube, or piping. The blower is not directly mounted to the hole in the back.
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Raadt
-- The information I provide is only information from readings, growing of gourmet mushrooms, and second hand stories--
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Seuss
Error: divide byzero
Registered: 04/27/01
Posts: 23,480
Loc: Caribbean
Last seen: 23 days, 8 hours
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Re: Flowhood construction questions [Re: Anno]
#1200538 - 01/08/03 10:33 AM (21 years, 8 months ago) |
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This one:
http://fungifun.50megs.com/cgi-bin/i/hepa_new/DSCF0021.JPG
It looks like the hole directly behind the filter is where the air comes in... could just be my eyes crossing 
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Just another spore in the wind.
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Anno
Experimenter
Registered: 06/17/99
Posts: 24,167
Loc: my room
Last seen: 1 month, 1 day
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Re: Flowhood construction questions [Re: Seuss]
#1200556 - 01/08/03 10:39 AM (21 years, 8 months ago) |
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The hole is at the top, and the air hits the wooden frame, then goes down toward the filter.
Edited by Anno (01/08/03 10:40 AM)
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 Alkaloids
3,4,5-trimethoxyphenethylamine
Registered: 11/15/98
Posts: 743
Loc: pubis mons
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Nice idea with the gauges. I wasn't aware that they could be gotten so cheap. Think I'll get one.
If you do get a multi-speed from Ebay you can probably make due without a rheostat as one of the speeds should get you within a nice operating range.
On the UV-C note. I have an extra fixture with bulb if someone is interested in trading or buying it. I managed to get 2 from a custom lighting manufacturer before they stopped making them.
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Seuss
Error: divide byzero
Registered: 04/27/01
Posts: 23,480
Loc: Caribbean
Last seen: 23 days, 8 hours
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Re: Flowhood construction questions [Re: Anno]
#1200727 - 01/08/03 11:22 AM (21 years, 8 months ago) |
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Ahhh! I see it now... very nice!
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Just another spore in the wind.
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Raadt
nicht
Registered: 06/07/02
Posts: 2,107
Loc: azurescending
Last seen: 5 years, 4 months
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Re: Flowhood construction questions [Re: Raadt]
#1203123 - 01/09/03 04:52 AM (21 years, 8 months ago) |
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For future reference for anyone looking for a blower.
Fungi perfecti (http://www.fungi.com) sells a variety.
All-Purpose Blower
115V/60Hz, 488 CFM free air delivery, 217 CFM at .8" static pressure. Draws 1.43 amps. A superb, multipurpose fan excellent for use in greenhouses, growing rooms, and for pushing air through small dimension micron filters. (12 x 12 inch and 24 x 12 inch HEPAs). Because of the attached split capacitor, a better operating efficiency is achieved.
FAN667 $169.00
1/2 Horsepower Blower
4-speed, 115V/60Hz blower, maximum 1,653 CFM at .8" static pressure. Draws 5.1 amps. A useful fan for delivering air into air circulation systems for growing rooms, spawn laboratories and incubation chambers. Also ideal for blowing air into 2 x 4 foot HEPA filters (use 2nd highest speed). Note: not for free air delivery. Must be used with at least .7" static pressure (all our HEPA filters are .8" static pressure).
FAN685 $419.00
FP's Universal Blower
This high-power, multi-purpose blower is the perfect choice for pushing air through our 24 x 18, 24 x 24 and 24 x 36 inch HEPA filters. Dual-voltage power supply operates at either 115 or 230V. Delivers 1,092 CFM at .8" static pressure (60Hz). Draws 8.6 amps @115V.
FAN831 $289.00
And their prices for HEPA's
High Efficiency Particulate Air (HEPA) Filters
Custom manufactured to FP's critical specifications, these scanned water resistant micron filters are stocked in six sizes and screen out all airborne contaminants down to .3 microns with a guaranteed efficiency of 99.99%. Individually scanned and tested for quality. These filters are used throughout the microbiological industry and by computer manufacturers, nuclear laboratories, photographers, and anywhere else clean air is a must.
MF1212 12 x 12 x 5.8 inches $89.95
MF2412 24 x 12 x 5.8 inches $129.95
MF2418 24 x 18 x 5.8 inches $159.95
MF2424 24 x 24 x 5.8 inches $229.95
MF3624 36 x 24 x 5.8 inches $289.95
MF4824 48 x 24 x 5.8 inches $349.95
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Raadt
-- The information I provide is only information from readings, growing of gourmet mushrooms, and second hand stories--
Edited by Raadt (01/09/03 05:30 AM)
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Anno
Experimenter
Registered: 06/17/99
Posts: 24,167
Loc: my room
Last seen: 1 month, 1 day
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Re: Flowhood construction questions [Re: Raadt]
#1203314 - 01/09/03 06:04 AM (21 years, 8 months ago) |
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Yes...but it?s far more expensive than Grainger or filersx .
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Raadt
nicht
Registered: 06/07/02
Posts: 2,107
Loc: azurescending
Last seen: 5 years, 4 months
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Re: Flowhood construction questions [Re: Anno]
#1203415 - 01/09/03 06:37 AM (21 years, 8 months ago) |
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All-Purpose Blower
115V/60Hz, 488 CFM free air delivery, 217 CFM at .8" static pressure. Draws 1.43 amps. A superb, multipurpose fan excellent for use in greenhouses, growing rooms, and for pushing air through small dimension micron filters. (12 x 12 inch and 24 x 12 inch HEPAs). Because of the attached split capacitor, a better operating efficiency is achieved.
FAN667 $169.00
that one is pretty much the same price, and exactly ~200CFM at .8", although with the prefilter it will end up being like 1.2", correct? Will that blower not be powerful enough?
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Raadt
-- The information I provide is only information from readings, growing of gourmet mushrooms, and second hand stories--
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Anno
Experimenter
Registered: 06/17/99
Posts: 24,167
Loc: my room
Last seen: 1 month, 1 day
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Re: Flowhood construction questions [Re: Raadt]
#1203721 - 01/09/03 08:25 AM (21 years, 8 months ago) |
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>Will that blower not be powerful enough?
You got it.
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blahblahblah
Mad Scientist
Registered: 10/24/01
Posts: 1,022
Loc: South America
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Re: Flowhood construction questions [Re: Anno]
#1203866 - 01/09/03 09:52 AM (21 years, 8 months ago) |
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ok I know this is a little off topic but here is something that I have been bidding for on ebay. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=3258&item=3103840908
My maximum bid was $50 and I had the auction but I think they person running the auction bid on them becuase my high bid wasnt high enough. The same person keeps buying them and then the guy runs the auction again. There is one up for auction currently, it is for five units. If anyone wants to bid on them let me know and I will go in on it with you.
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debianlinux
Myconerd - DBK
Registered: 12/09/02
Posts: 8,334
Loc: Over There
Last seen: 25 days, 11 hours
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Re: Flowhood construction questions [Re: blahblahblah]
#1206420 - 01/10/03 07:17 AM (21 years, 8 months ago) |
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Quote:
but I think they person running the auction bid on them becuase my high bid wasnt high enough.
possibly not because that is what a reserve price is for. if you really suspect this then report it to eBay and they will investigate it. sorry for the OT but it's good info for anyone on eBay.
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420M
Long Time Reader- First TimePoster
Registered: 10/29/02
Posts: 64
Last seen: 21 years, 6 months
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Re: Flowhood construction questions [Re: Raadt]
#1210100 - 01/11/03 04:56 PM (21 years, 8 months ago) |
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I made and used this flowhood for years. . ..
www.fungifun.org/flowhood
I moved to a new house - with a higher spore count and it doesnt seem to produce contaminate free substrates anymore.
Here is the one I built this week. I built it to be more 'enclosed' where I work - I hope it helps - BTW my prefilter is an automotive air filter for a truck.
http://www.nansnook.com/forum/index.php?act=ST&f=21&t=1704&s=3c4f4ed559a0e64d42b6420d1aebf5d2
Good Luck - 420M
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