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OfflineGr0wer
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HF-300 Hepa filter for flow hood
    #21786073 - 06/09/15 11:01 PM (8 years, 7 months ago)

In the planning stage of my flow hood. No search results for HF-300 on the forums so im wondering if anyone has considered using this filter. My plans are to silicone seal two of them for a 25" x 16" flow hood. Looks real cheap per square foot and seems to fit the specs. Any input?


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OfflineIkarus
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Re: HF-300 Hepa filter for flow hood [Re: Gr0wer]
    #21786131 - 06/09/15 11:13 PM (8 years, 7 months ago)

Just looked at the picture on Amazon and haven't researched specs, but that filter looks thin and might not provide enough resistance to produce laminar flow.

I'm also wondering if sticking two of them together would produce turbulence.


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Invisibleinsanemike

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Re: HF-300 Hepa filter for flow hood [Re: Ikarus]
    #21786609 - 06/10/15 01:31 AM (8 years, 7 months ago)



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InvisibleRPW
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Re: HF-300 Hepa filter for flow hood [Re: insanemike]
    #21786882 - 06/10/15 04:18 AM (8 years, 7 months ago)

Quote:

insanemike said:
Hope this helps you out.

http://www.fungifun.org/English/Flowhood
http://www.spycor.com/mobile/Product.aspx?ProductCode=H13G1X1
http://www.kochfilter.com/BioMAX_HEPA
http://www.hvacquick.com/products/residential/Fans/Inline-Fans/Fantech-FKD-Series-Inline-Centrifugal-Fans




The Vortex fans are better if you're building a smaller flow hood. Their VTX1000 is 481 CFM at 1", only 18 CFM less than the cheapest model you linked to, but the price is $140 less, and the warranty is 7 years longer.


--------------------
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Invisibleinsanemike

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Re: HF-300 Hepa filter for flow hood [Re: RPW]
    #21786914 - 06/10/15 04:46 AM (8 years, 7 months ago)

I didn't buy my blower from that site. I paid 210 usd on ebay for a brand new fkd 10 that had a minor cosmetic blemish and it was sold to me from that same company. I was just trying to help. I'm not the one trying to rig up a make shift hepa filter to put into a flow hood.


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Offlinemushpunx
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Re: HF-300 Hepa filter for flow hood [Re: insanemike]
    #21786944 - 06/10/15 05:09 AM (8 years, 7 months ago)

Yea , no I wouldnt use that filter.

Start looking on ebay for like a 12x24x6 filter and that should give you a better idea of what youre looking for.

Filters are cheap. A couple hundred usually unless you can get. Good deal.

Also gunna need to learn the proper math (its pretty easy but daunting at first :lol: at least for me) to match a blower to your filter.


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OfflineGr0wer
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Re: HF-300 Hepa filter for flow hood [Re: mushpunx]
    #21788928 - 06/10/15 03:44 PM (8 years, 7 months ago)

I already have a fan, picked it from a dumpster actually and its tits, loud as fuck but tits,

http://www.alliedelec.com/ametek-150231-00/70278244/#tab=specs

OK so the one i posed won't have the flow volume i'm looking for. I saw a handful around $150 in the size id like so i guess ill just have to dish out the money.


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OfflineGr0wer
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Re: HF-300 Hepa filter for flow hood [Re: insanemike]
    #21788951 - 06/10/15 03:48 PM (8 years, 7 months ago)

Quote:

insanemike said:
I didn't buy my blower from that site. I paid 210 usd on ebay for a brand new fkd 10 that had a minor cosmetic blemish and it was sold to me from that same company. I was just trying to help. I'm not the one trying to rig up a make shift hepa filter to put into a flow hood.



umm isn't that what everyone does? It is a hepa filter i'm not make shifting anything. My old flow hood used to have two 12x12x12 filters and had zero issues.



and why do so many people on this forum so quickly turn to insults and bashing.... its the most hostile forum i've even been on.


Edited by Gr0wer (06/10/15 03:50 PM)


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Invisiblemaddchef
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Re: HF-300 Hepa filter for flow hood [Re: Gr0wer]
    #21788957 - 06/10/15 03:49 PM (8 years, 7 months ago)

The fan you linked is 480cfm most likely @ free air.

Once you put it behind a filter with resistance it will drop drastically. Something like 250cfm@1sp

That's just a guess but I'm probably not that far off.


--------------------
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OfflineGr0wer
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Re: HF-300 Hepa filter for flow hood [Re: maddchef]
    #21788988 - 06/10/15 03:57 PM (8 years, 7 months ago)

So at around 2-300 cfm i should be good using that fan on a 12"x24"x 6+" filter. Thanks for the pointers and links!


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OfflineGr0wer
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Re: HF-300 Hepa filter for flow hood [Re: Gr0wer]
    #21789067 - 06/10/15 04:16 PM (8 years, 7 months ago)

http://www.ebay.com/itm/NEW-ASTROCEL-I-1000CFM-CLEAN-ROOM-HEPA-FILTER-24X24X12-/360960905857?pt=LH_DefaultDomain_0&hash=item540af25281

I think ill go with one of these astrocel 1484120-6 1000cfm 24x24x12 filter for 120 shipped. Seems a ton of people have used the same exact lot to make flow hoods.


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Offlinemushpunx
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Re: HF-300 Hepa filter for flow hood [Re: Gr0wer]
    #21789132 - 06/10/15 04:31 PM (8 years, 7 months ago)

Quote:

Gr0wer said:
http://www.ebay.com/itm/NEW-ASTROCEL-I-1000CFM-CLEAN-ROOM-HEPA-FILTER-24X24X12-/360960905857?pt=LH_DefaultDomain_0&hash=item540af25281

I think ill go with one of these astrocel 1484120-6 1000cfm 24x24x12 filter for 120 shipped. Seems a ton of people have used the same exact lot to make flow hoods.





This is a better filter than what you first posted. You will definitly have to match a proper blower to it. If your blower is 480@ free air it might not be big enough.

Mine is 549cfm @ free air for a smaller filter, 18 x 24
I didnt drag out the math on yours tho.

Only trouble with that filter is that since its 12" wide, you will need a 12" plenum at least behind the filter. Its going to be bulky and heavy is all


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Invisiblemaddchef
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Re: HF-300 Hepa filter for flow hood [Re: mushpunx]
    #21789197 - 06/10/15 04:46 PM (8 years, 7 months ago)

I'm on my phone but it looks as if the resistance is 0.4.

I believe that to be a high capacity filter for a clean room. I don't think it will develop enough resistance for laminar flow.


--------------------
In the land of the blind, the one eyed man is king.

All mushrooms are edible, but some only once.....                     

                                        Easier than cakes

I do science and shit.

:havesomescience:


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Offlinemushpunx
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Re: HF-300 Hepa filter for flow hood [Re: maddchef]
    #21789287 - 06/10/15 05:03 PM (8 years, 7 months ago)

"When I say a filter doesn't have a specific static pressure, I mean the static pressure is in the plenum. 1"wg could be obtained with any filter, with the right blower.
The SP required for laminar flow is usually somewhere between 0.8"&1.2"wg.
The key is to maintain a flow rate of around 100cfm per ft2 face area, while maintaining the 1"wg plenum pressure.
The flow rate is the difference with thicker filters - it will be slightly higher, as it has (usually) less resistance.
But it will be laminar, which is the important part. You just have to get the charts for the blower, and match it to the specs of the filter"

Here is a quote from a convo with Blojo02184

I dunno if Im applying what he was saying correctly but I think that filter would work providing he uses a proper blower and at least a 12" plenum behind the filter?


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Invisiblemaddchef
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Re: HF-300 Hepa filter for flow hood [Re: mushpunx]
    #21789316 - 06/10/15 05:12 PM (8 years, 7 months ago)

From what I get of that filter they threw 1000cfm through it and it developed 0.4wg. So you'd in theory have to throw almost 3 times that. And that's if it scales that way which it prilobably doesn't.


--------------------
In the land of the blind, the one eyed man is king.

All mushrooms are edible, but some only once.....                     

                                        Easier than cakes

I do science and shit.

:havesomescience:


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Offlinemushpunx
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Re: HF-300 Hepa filter for flow hood [Re: maddchef]
    #21789334 - 06/10/15 05:16 PM (8 years, 7 months ago)

Beats me man, haha I really have minimal knowledge on this stuff :lol:


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Invisibleinsanemike

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Re: HF-300 Hepa filter for flow hood [Re: mushpunx]
    #21790357 - 06/10/15 08:50 PM (8 years, 7 months ago)

I have a 18x24x5 7/8 hepa filter with a 910 cfm blower that puts out just enough air through the hepa to reach laminar flow. If op would actually click on the first link that I posted, it would explain in great detail of how to match a blower with a filter.


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OfflineGr0wer
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Re: HF-300 Hepa filter for flow hood [Re: insanemike]
    #21790767 - 06/10/15 10:30 PM (8 years, 7 months ago)

The astrocel is .4 wg, says right on the test sticker on the ebay listing. A 24x24 Merv 13 pre filter should give enough backpressure to get it into the .8+" WP window.

insanemike.. before you get all smartass, my blower pushes ~470 CFM at 1" it still pushes over 400 at 6" thats half a bar. Its a 8000+ RPM 10A turbine, not a 600 rpm axial blower, or squirrel cage blower. It blows the socks off your FKD 10 hence the $1200 price tag. Its perfect for a 2'x2' with a 24x24 pre filter blowing 400+ CFM giving me 100 ft/min. It also has a digital speed controller so i can always throttle it back if need be.  Loose the attitude nobody cares for it. Sorry i didn't report to you all my findings i didn't know i had to. The links you sent were really helpful and i thank you, but your comments that followed weren't needed.


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