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Supalemonhaze
Spore syringe hater.



Registered: 10/02/15
Posts: 6,725
Loc: 12" down Europe's butthole
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Quote:
Marty Mycfly said: That's the thing Im not really sure you are talking about what "you know". To use words commonly used around here, pictures or it didnt happen, let's see your hood and all of the other ones you have been building. I will stop here, I got a warning message about my language from pussyfart that you reported me, sorry I called your emojis f***y.
Actually, I think you got called out for calling people who correct you "dummasses". That doesn't go down too well with the community.
You know, I actually have a brain and I know I did post pics of my FH exactly 4 posts above. I don't have to prove myself to you, what I say has logic to back it up, I have yet to see you prove how a 12" filter has more resistance or what's the difference between laminar flow and true laminar flow. Let's start by seeing you prove those two ridiculous statements before I go out of my way to bother the folks I helped with the 12" to come here and satisfy your skepticism.
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mushpunx
Fungus Punk


Registered: 04/20/14
Posts: 13,394
Last seen: 11 days, 15 hours
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Re: HEPA filter selection [Re: joshxjosh]
#23458156 - 07/20/16 12:17 AM (7 years, 6 months ago) |
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Quote:
joshxjosh said: both of you have given me a tremendous amount of helpful information. I will be going with the 24" x 24" x 12" filter with a 12" (at least) plenum behind it, with a ~450cfm blower at a 90degree angle to the filter.
You need a blower that is 400CFM AT an SP of 1.2 minimum
If you just buy a blower listed at "450CFM" its going to be way too tiny, because that is 450CFM @ free air...
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 Amateur Mycologists United AMU Q&A
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Supalemonhaze
Spore syringe hater.



Registered: 10/02/15
Posts: 6,725
Loc: 12" down Europe's butthole
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Re: HEPA filter selection [Re: mushpunx]
#23458408 - 07/20/16 03:37 AM (7 years, 6 months ago) |
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I worked it out for him through pms. His filter is 12" so it won't be operating at 1.2" w.g. It's like 440cfm @ 0.2" w.g without the prefilter included. The fungifun guide uses another hepa for a prefilter so 0.2 is kinda overkill for less quality pre filters. But approximately, it's 440cfm @0.3-4" w.g, depending on the pre-filter. I think something like the filterete like you guys like to use shouldn't be more than 0.1w.g

That's the chart for his filter. Since 100linear fpm = 400cfm. On the chart you can see that with 400cfm of flow behind the filter, the s.p will be ~0.2". Add the 10% for friction and blower inaccuracies and it's 440cfm @ 0.2"w.g for the hepa alone.
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