trying to thrive in flowhood hell

Discussion in 'ADVANCED MYCOLOGY' started by fat jefferson, May 26, 2016.

  1. fat jefferson

    fat jefferson New Member

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    Okay, so I've been using the search feature, here and other places, and I've found information CLOSE to what I'm looking for but at the same time, not what I'm looking for. Here's my deal.

    My original intentions was to build a flowhood with a 24x18x6 filter, and the blower I found that I felt would work with it was the Dayton 1tdt8 ( https://www.grainger.com/product/DA...m/rp/s/is/image/Grainger/1TDR9_AS01?$smthumb$ ) but then after trying to source a good filter and failing due to limited selection (these dimensions don't seem nearly as common as the 24 x 12 or 24 x 24 but I was stubborn about the 18 inches for a while) and shipping that almost surpassed the value of the filter. I understand this is a large unusual sized filter, but I just don't feel comfortable spending $130 shipping. Supposedly I'm in a "rural" area (bullshit).

    Anyways, I've decided to bump up to a 24 x 24 x 6 filter because I feel it will be easier to source what I need, but now I'm trying to jump through the hoops to find a blower that's suitable for this size. I've read other build logs of a 24 x 24 x 6 filter flowhood but I haven't been able to find any specifics on which blower will be right for it, like I have when looking up builds of a 24 x 18 x 6.

    So what I'm looking for is someone who already knows, or would know where to look, and ANY information that could be helpful, to sourcing the right gear for this size flowhood. I've been trying to use search features on several forums but I have never been able to get any search feature to ever help me out.

    Anyway, if I can't get this flowhood done soon, I can go the route of the SAB but I'm all about what a flowhood has to offer.

    so more specifically, what I'm looking for help for:
    -a blower motor that's suitable for a 24 x 24 x 6 inch filter that will give me about 450 CFM at 1" static pressure
    -possibly a source for a reasonably priced 24 x 24 x 6 filter, I'm not familiar with any of the sellers and would feel comfortable with a strong recommendation from someone (building a flowhood is the cheap route but it's still a big gamble for me at the moment, I don't want to end up wasting $500 because I sourced the wrong parts)

    Thanks for any help, good luck on all your voyages near and far
     
  2. PE-n-hed

    PE-n-hed Well-Known Member Moderator Mushroom Doctor Cannabis Doctor Supporter

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    I got my filter from Flanders Corp directly
    I then used a 8" inline 750cfm fan found at the local grow shop
    I used a speed control to slow it down a notch and a high flow pre filter material
    Flanders is local to me and I think shipping was even free?
    I called them direct and they were very helpful
    Searching the webz isn't as easy as the phone call IME
    Get a sheet of MDF at the home supply store
    Filter was like150.00
    Fan was like 150.00
    I had the wood for the box ,but can see spending 50.00
    Plus your time on the build
     
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  3. cue

    cue Well-Known Member

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    In my case it wasn't as easy as just going with Amazon. After spinning my wheels doing many searches I just said "fuck it" and went with Amazon. I do know that I didn't get a bargain though.
    I too went with the 8" inline fan from a local grow shop, and I just need the fan speed controller now.
     
  4. nomendubium

    nomendubium scraping by, since '97 Expert Identifier

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    most fans don't show you the output at resistance, but having looked at about a million and comparing, most squirrel cage and centrifugal inline fans lose about 1/3 (33%) of their open air output when you put 1" of resistance on them. So if you want 450@1" w.g., that is basically a 600 cfm fan...but I suggest you build it a little bigger than 450 cfm, that is only 125 fpm when it is brand new (and they slow down as they fill with dirt) 600cfm sounds safer to me, which would be a 800 cfm fan wide open
     
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  5. PE-n-hed

    PE-n-hed Well-Known Member Moderator Mushroom Doctor Cannabis Doctor Supporter

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    All calculations aside
    The 750cfm wide open would blow a flame out
    I slowed down the turbulence to bend a flame at about six inches from the filter face
    I never had any problems with agar work
    So in a nut shell it just works
     
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  6. MorePies

    MorePies Active Member

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    Having recently built a hood and searched near endlessly with similar questions, I have a few suggestions.

    For filters in the 24 x 24 dimensions, check eBay. A lot of the 24 x 24 filters on eBay are 12" inch thick and these will work but are often avoided for hoods. They are avoided because the 6" filters have a higher air flow resistance and are thought to be more conducive to laminar flow. As to air flow, the 100cfm orginally advocated by Stamets is now considered to be too slow. So my thought is that if you found a deal on a thicker filter you could use a slightly smaller fan, saving there too.

    When looking at filters you are looking at the filtration percentage of. 3 microns, 99.97 being the acceptable minimum. I ordered a filter from Airfiltersusa and they custom built one at a very good price. Of you do talk to them, be very specific. Metal frame, gasket upstream, and ask if where the filter material is located within that frame and how thick it is. Near flush with the front, and as thick as possible is what we want for a hood. They have a lot of different brands and this way you will get what's right.

    My best advice for sourcing a fan is to actually scour Craigslist for a used blower unit from an hvac unit. Also, call around to hvac places. For 120v, you're looking for a phase 1 blower and 1/3 hp will be more than enough. I found mine for 40 bucks.
     
  7. nomendubium

    nomendubium scraping by, since '97 Expert Identifier

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    if you are in Ohio, I have a couple of good hvac blowers I'll sell you one for cheap
     
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  8. treewood

    treewood mediocre mycologist Moderator Mushroom Doctor Supporter

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    24x24x6 fan wouldn't be that much new. i got a 18x24x6 and my blower is 161 dollars now.