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OfflineWeeds33d
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Building a flowhood, will this dayton and filter work together?
    #26897515 - 08/24/20 05:14 PM (3 years, 5 months ago)

So basically the title says it all I'm finally building a flow hood and I'm just curious if you guys can double-check if everything will work together before I order the parts.

So I plan on using the Dayton 1tdu2 blower here is a link with the specs. https://www.grainger.com/mobile/product/1TDU2?gucid=N:N:FPL:Free:GGL:CSM-1946:tew63h3:20501231

With it I plan on using a 24x36-inch HEPA filter at 99.99 at 0.3 micron from damn filters here is the link with the specs.
https://www.google.com/amp/s/damnfilters.com/apps/fireamp/products/hepa-filter-24-x-36-x-6-1000-cfm-99-99-particle-board

if you search on YouTube Flow Hood build a video comes up by freshcap mushrooms I basically plan on using the same design just sizing it down to my filter you guys can check it out if you want it's a video and DIY plants it's pretty cool... Just saying, really makes the process seem very easy!

I would like to include a pre-filter as well. So basically the question is will the blower be adequate with this HEPA filter and pre-filter?

Thanks guys!


Edited by Weeds33d (08/24/20 09:12 PM)


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OfflineWeeds33d
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Re: Building a flowhood, will this dayton and filter work together? [Re: Weeds33d]
    #26897863 - 08/24/20 09:11 PM (3 years, 5 months ago)

Helppppppp


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OfflineWeeds33d
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Re: Building a flowhood, will this dayton and filter work together? [Re: Weeds33d]
    #26899027 - 08/25/20 03:55 PM (3 years, 5 months ago)

Anybody? Lol sorry don't mean to be annoying and keep bumping but just looking for some clarification before I go ahead and build the damn thing


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InvisibleNormlizer420
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Re: Building a flowhood, will this dayton and filter work together? [Re: Weeds33d]
    #26899391 - 08/25/20 07:43 PM (3 years, 5 months ago)

sorry never built one but plan to one day but the chart in the middle of the page should help a little.


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Offlinebrad81684
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Re: Building a flowhood, will this dayton and filter work together? [Re: Weeds33d]
    #26899418 - 08/25/20 07:58 PM (3 years, 5 months ago)

itll be fine. you might need to put a variable speed controller on there because it might be too strong still. its a really powerful blower.


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InvisibleFunky Monkey
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Re: Building a flowhood, will this dayton and filter work together? [Re: Weeds33d]
    #26899442 - 08/25/20 08:10 PM (3 years, 5 months ago)

I don't think that blower will be enough.

I actually just got done sourcing a 1/2 hp blower and 24 x 48 filter for my own build and I ended up narrowing my choices down to those vendors too. I actually bought my blower from grainger as well, and ended up going with global industries over Damn Filters only because there was a six week lead time from DF.

Anyways, I actually spoke to the guy at DF and got the static pressure specs on the 24 x 48 inch version I was looking into. That one had a somewhat lower than expected rating of 0.8", so without calling to check on yours I would assume it is the same rating for the next size down as well. (Edit:It's even listed on the page 0.79", which was the same for the 24 x 48) It was the case for all the various sizes of the koch filters on offer from global industries as well.

Having said all of that, assuming it is a 0.8" rating and you add a prefilter at another 0.2" that is 1.0" minimum, and that blower taps out before getting you where you need to be. The chart even stops at o.8" @ 1040. Add a prefilter and you are cutting it close at best, and it's better to get a little too much blower than not enough.

This is my first build, and maybe one of these seasoned vets can double check my math/calculations.


Edited by Funky Monkey (08/25/20 08:12 PM)


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Offlinebrad81684
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Re: Building a flowhood, will this dayton and filter work together? [Re: Funky Monkey]
    #26899448 - 08/25/20 08:16 PM (3 years, 5 months ago)

At 1.6"sp the 1tdu2 puts out 800cfm. He needs 600cfm, thats why i said probably need a speed controller to tame it down if his sp isnt that high.


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InvisibleFunky Monkey
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Re: Building a flowhood, will this dayton and filter work together? [Re: brad81684]
    #26899477 - 08/25/20 08:38 PM (3 years, 5 months ago)

1.6"?


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OfflineWeeds33d
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Re: Building a flowhood, will this dayton and filter work together? [Re: Funky Monkey]
    #26899487 - 08/25/20 08:47 PM (3 years, 5 months ago)

Funky Monkey if the Dayton blows at 1040 at .8 IN WG, the pre-filter at .2 so we're  around 1.0. and I would only need 600 CFM for that size filter correct (2x3=600CFM) Wouldn't this be more than adequate?

in addition I would really hate to add a speed controller as I heard the daytons don't like these, in addition I would never know how to dial it in perfectly


Edited by Weeds33d (08/25/20 08:49 PM)


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InvisibleFunky Monkey
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Re: Building a flowhood, will this dayton and filter work together? [Re: Weeds33d]
    #26899501 - 08/25/20 08:56 PM (3 years, 5 months ago)

I was just coming in with the edit lol, it is probably cool I just looked at the drops that are charted and each drop isn't by much so there is no reason to think you cant get what you need by the time you get to your final static pressure etc


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OfflineWeeds33d
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Re: Building a flowhood, will this dayton and filter work together? [Re: Funky Monkey]
    #26899512 - 08/25/20 09:02 PM (3 years, 5 months ago)

I managed to find the chart here it is


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Re: Building a flowhood, will this dayton and filter work together? [Re: Funky Monkey]
    #26899513 - 08/25/20 09:03 PM (3 years, 5 months ago)

Me no likey thinky sometime... :rofl:

It just made me panic about the math on my own build so I had to go double check lol

I would have ripped my own nipples off if I just spent all that money on truck freight and I got the wrong shit!

Shaping up to be a $1400 build as it stands and sending things back and reordering would have upped the ante considerably :facepalm:

SOOOOOO. I again will defer final judgement to someone who has completed more than none of these builds, but it looks like you're good to this simpleton. :cheers:


Edited by Funky Monkey (08/25/20 09:08 PM)


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OfflineWeeds33d
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Re: Building a flowhood, will this dayton and filter work together? [Re: Weeds33d]
    #26899515 - 08/25/20 09:04 PM (3 years, 5 months ago)

To be honest I was just worried that it was going to be too strong.... And like I said I don't want to add a speed controller....


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Re: Building a flowhood, will this dayton and filter work together? [Re: Weeds33d]
    #26899522 - 08/25/20 09:12 PM (3 years, 5 months ago)

Quote:

Weeds33d said:
To be honest I was just worried that it was going to be too strong.... And like I said I don't want to add a speed controller....




Extra prefilters :thumbup:

You're looking gucci

Enough out of me, I'll save it for some future day when I can read, add, and subtract properly. MonKeyOut


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Offlinedothedew69
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Re: Building a flowhood, will this dayton and filter work together? [Re: Funky Monkey]
    #26899850 - 08/26/20 03:34 AM (3 years, 5 months ago)

So you need to hit 600cfm to achieve laminar flow, looking at the curve you have a ways to go. I spoke with Grainger and they absolutely said not to use a speed controller you can burn the motor out. You have options, actually you have a lot of options. Some nerve 10-13 filters are .2-.3wg each so from .79 you need to go to too ok about 1.5-1.6 wg looking at the curve. Now you can go from 80-120 fpm I believe so to reach 100fpm you will need to double your wg, basically 4 pre-filters. Or you can search for a thick 4” that can give you more resistance. Grainger even suggested building in a sliding metal panel where the exhaust is so you can move it to “adjust airflow” as a speed controller but not a real speed controller. If you think about it, you could honestly buy this: https://www.spycor.com/99-97-HEPA-Filter-Wood-Frame-8-x-8-x-5-7-8-p/magpb0808a5a.htm an 8x8 99.97 HEPA filter which has .75 wg and it’s $44. If you bought 4 filters to stack on top it would cost even more. That would put you right around where you would want to be if I’m looking at the data sheet properly. How much better could your flow hood get? A 99.97 HEPA pre-filter? Kind of wish I did that lol/


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