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Pilz-Grower
Stranger

Registered: 03/02/21
Posts: 24
Loc: US
Last seen: 5 months, 18 days
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: GARDEN.STATED]
#28248936 - 03/27/23 08:46 AM (9 months, 27 days ago) |
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Hi Guy's,
I need help with my new Flow hood. I got a super deal on 2 2x3 ft filter ( the size is actually 18x 30 inch). I just called Dayton about a Blower and they Basically gave me two option.
Here is the Filter Label Reading : Rated FPM 100 @ .53 (point 53) Max W.G Pressure Drop
Dayton's suggestion for a Blower is these two:
https://www.grainger.com/product/DAYTON-OEM-Blower-5-1-8-in-Wheel-45NM96?searchQuery=45NM96&searchBar=true&tier=Not+Applicable
Or
https://www.grainger.com/product/DAYTON-OEM-Blower-5-1-8-in-Wheel-1TDP9?opr=PDPBRDSP&analytics=dsbrItems_45NM96
My question is, which one is the more suitable one?
Edited by Pilz-Grower (03/27/23 08:49 AM)
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Stipe-n Cap


Registered: 08/04/12
Posts: 7,623
Loc: Canada
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Pilz-Grower] 2
#28249331 - 03/27/23 01:53 PM (9 months, 27 days ago) |
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Neither of those blowers will work. You want to push at least 600CFM @ your static pressure; be sure to include the resistance of any pre filter.
2x3= 6ft² x 100 FPM = 600 CFM @ .53 inwg
Click the flowhood template in my sig.
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MrDeez


Registered: 03/27/23
Posts: 7
Last seen: 8 months, 21 days
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Stipe-n Cap]
#28250245 - 03/27/23 11:57 PM (9 months, 27 days ago) |
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I just recently did my first inoculation using the unmodified SAB tek. Still under a week so not sure the results anyone with positive or negative experience?
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Stipe-n Cap


Registered: 08/04/12
Posts: 7,623
Loc: Canada
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: MrDeez] 1
#28250542 - 03/28/23 07:45 AM (9 months, 27 days ago) |
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Unmodified SAB?
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dowodenum
Noob Pope



Registered: 08/05/19
Posts: 1,268
Loc: 🇨🇦
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Stipe-n Cap] 2
#28250548 - 03/28/23 07:47 AM (9 months, 27 days ago) |
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I think it's called "edge of counter tek"
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 🅃 🄴 🄰 🄼 🄲 🅄 🅁 🄸 🄾 🅄 🅂
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Pilz-Grower
Stranger

Registered: 03/02/21
Posts: 24
Loc: US
Last seen: 5 months, 18 days
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Stipe-n Cap] 1
#28250588 - 03/28/23 08:14 AM (9 months, 27 days ago) |
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Quote:
Stipe-n Cap said: Neither of those blowers will work. You want to push at least 600CFM @ your static pressure; be sure to include the resistance of any pre filter.
2x3= 6ft² x 100 FPM = 600 CFM @ .53 inwg
Click the flowhood template in my sig.
Thank you very much for helping out.
So that would mean actually 375 cfm ( 18" x 30")......
I'm really confused about the Data. When I go to Dayton I can't figure it out. Any chance you can help me to pick the right Fan ? I'm also thinking about building a Box with both Filter side by side.
Edited by Pilz-Grower (03/28/23 08:54 AM)
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Stipe-n Cap


Registered: 08/04/12
Posts: 7,623
Loc: Canada
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: dowodenum] 2
#28250593 - 03/28/23 08:16 AM (9 months, 27 days ago) |
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Oh, weird. My a priori assumption: the open bottom allows unnecessary drafts to be applied to the floor of the SAB where particles are intended to remain at rest.
But, will it "work"? I think we've thoroughly beat that dead horse. Is it optimal, I'd have to err on the side of caution by saying no, not likely to be the most optimal selection.
Quote:
Pilz-Grower said: So that would mean actually 375 cfm ( 18" x 30")......
1.5' x 2.5'= 3.75'
I'd call it 400CFM for simplicities sake while shopping. 400 @ .53 inwg. Dayton should have a blower that comes pretty close to that.
Over powering by a bit will allow your filter to take on particles/increase filtration efficiency a bit while slightly reducing airflow over time.
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Moshe
Professional Idiot


Registered: 02/16/23
Posts: 218
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Pilz-Grower]
#28250874 - 03/28/23 11:01 AM (9 months, 26 days ago) |
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Quote:
Pilz-Grower said:
Quote:
Stipe-n Cap said: Neither of those blowers will work. You want to push at least 600CFM @ your static pressure; be sure to include the resistance of any pre filter.
2x3= 6ft² x 100 FPM = 600 CFM @ .53 inwg
Click the flowhood template in my sig.
Thank you very much for helping out.
So that would mean actually 375 cfm ( 18" x 30")......
I'm really confused about the Data. When I go to Dayton I can't figure it out. Any chance you can help me to pick the right Fan ? I'm also thinking about building a Box with both Filter side by side.
The fan is the cheap part, the filter is the real expense. I don't know what deal you've got, but all the things combined, it's cheaper to just order a Chinese FFU from Amazon. I know a guy who has one of these and he's pretty happy with it
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Pilz-Grower
Stranger

Registered: 03/02/21
Posts: 24
Loc: US
Last seen: 5 months, 18 days
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Stipe-n Cap]
#28250875 - 03/28/23 11:02 AM (9 months, 26 days ago) |
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So if I ad a pre filter I need about .75 static pressure. Does that mean, when I search at Dayton, I've to search for a 3/4 in WC ?
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Pilz-Grower
Stranger

Registered: 03/02/21
Posts: 24
Loc: US
Last seen: 5 months, 18 days
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Moshe]
#28250879 - 03/28/23 11:07 AM (9 months, 26 days ago) |
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The filter came in a downdraft table. with 2 2x3 charcoal filter mounted over the hepafilter. The whole thing is stainless steel. There is a fat fan in there, but the housing of the fan is kinda also the downdraft table and nothing you could take just out and mount it in a Box.
I got the Table for 50 Bucks. Just the steel is more worse......
It's Raining all day today. I'll make a Picture after it stopped raining ,
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PBJ710
Strangler


Registered: 07/05/19
Posts: 2,623
Last seen: 17 days, 23 hours
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Pilz-Grower]
#28251095 - 03/28/23 01:00 PM (9 months, 26 days ago) |
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Quote:
Pilz-Grower said: So if I ad a pre filter I need about .75 static pressure. Does that mean, when I search at Dayton, I've to search for a 3/4 in WC ?
Yeah, you need ~400cfm @ .75wg if you want to run a prefilter. If you look at the fan specs, it will show the airflow @ pressure ratings. You can always choke the intake airflow or add another prefilter if you can't find the perfect match and need to go slightly overpowered with the fan.
Dayton 1TDT8
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Stipe-n Cap


Registered: 08/04/12
Posts: 7,623
Loc: Canada
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: PBJ710]
#28251153 - 03/28/23 01:27 PM (9 months, 26 days ago) |
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That's definitely overkill, I'd recommend the 1TDT2:
https://www.grainger.com/product/DAYTON-OEM-Blower-6-1-4-in-Wheel-1TDT2?searchQuery=1TDT2&searchBar=true&tier=Not+Applicable
Airflow @ 0.500 in SP 450 cfm Maximum Static Pressure1-1/4 in wc
My 1'x2' series 1 runs this blower without a prefilter. At .75" SP your blower will be within appropriate range, but I'd just run it without.
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Pilz-Grower
Stranger

Registered: 03/02/21
Posts: 24
Loc: US
Last seen: 5 months, 18 days
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Stipe-n Cap] 1
#28251286 - 03/28/23 02:31 PM (9 months, 26 days ago) |
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Thank you, thank you both.....
I think I'll go with the smaller one, the smaler one is about 100 Bucks cheaper. That's half the money for a second Fan to buy and run the second Filter.
Again , thanks for the help.
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Stipe-n Cap


Registered: 08/04/12
Posts: 7,623
Loc: Canada
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Pilz-Grower]
#28251405 - 03/28/23 03:41 PM (9 months, 26 days ago) |
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Pastywhyte
Say hello to my little friend



Registered: 09/15/12
Posts: 37,808
Loc: Canada
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Stipe-n Cap] 4
#28252150 - 03/28/23 09:56 PM (9 months, 26 days ago) |
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I like the look of that M on ya
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Stipe-n Cap


Registered: 08/04/12
Posts: 7,623
Loc: Canada
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Pastywhyte] 1
#28252523 - 03/29/23 06:57 AM (9 months, 26 days ago) |
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dyel



Registered: 10/15/21
Posts: 920
Last seen: 3 hours, 35 minutes
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: Stipe-n Cap] 1
#28252850 - 03/29/23 11:45 AM (9 months, 25 days ago) |
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ok this might be a dumb question so take it easy on me guys from my understanding you need like 90fpm for laminar flow, question is how higher can you go without issues? I'm asking because what if you can't find a perfectly marching filter/blower
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San Pedro Girl
Shoebox Ninja🥷




Registered: 07/17/12
Posts: 2,385
Loc: Fuck off pig!🐷
Last seen: 12 hours, 58 minutes
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: dyel]
#28252858 - 03/29/23 11:50 AM (9 months, 25 days ago) |
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Quote:
dyel said: ok this might be a dumb question so take it easy on me guys from my understanding you need like 90fpm for laminar flow, question is how higher can you go without issues? I'm asking because what if you can't find a perfectly marching filter/blower
You shouldn’t go higher than 118fps to avoid turbulence from air rotors. You can always use a motor controller/freq drive to throttle back a motor that’s oversized. That would actually be ideal since you can gradually turn it up as the filter gets clogged to extend the working life.
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dyel



Registered: 10/15/21
Posts: 920
Last seen: 3 hours, 35 minutes
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: San Pedro Girl]
#28253038 - 03/29/23 02:00 PM (9 months, 25 days ago) |
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i assume laminar flow is a range and not a number or else it will be only a line and not an area (im referring to the working area in front of the hood) since flow will lose velocity due to friction and physics stuff wikipedia is saying something about Reynolds number but I'm still not completely clear about it guess I'll need to do some research then
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Shroomin4u
Shroomer

Registered: 02/18/22
Posts: 43
Last seen: 9 months, 18 days
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Re: Box fan flowhoods, Glove boxes, Positive pressure boxes and Automated Mono-Tubs [Re: San Pedro Girl]
#28263156 - 04/05/23 08:14 AM (9 months, 19 days ago) |
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Quote:
San Pedro Girl said:
Quote:
Shroomin4u said: Two points, stop calling me a noob if you don't like ad hominem you hypocritical oaf. Although I suspect this was bait to get me to attack you.
Second point. You are purposefully ignoring the price of HEPA filters and the fans that can overcome those kind of resistances. They range from a minimum of 200-900$
Gaskets, hinges, latches, etc. Plywood, 2x4s, etc. Cost a extremely small fraction of that. Not to mention you have to match your fan and filters with laminar math (because laminar flow is a mathematic equation.) A good quality GB would cost a fraction of what a laminar flow hood would.
As well SABs are just primitive Glove boxes. Or rather glove boxes are just upgrades to still air boxes.
Pretending like I want to slap gloves into drilled holes in a plastic bin is just what you want to hear because you can't even imagine that you're wrong. So you'll just contuine living in delusion and beleiving that I'm not as smart as you (how sad.)
-sidenote You don't need inert gas for a glovebox, but you could easily purchase said gas from a welding shop if you wanted to use it.
The crew around here are more about practical application vs speculation. A lot of members grow well using SABs and FFUs. Hell, some even do open air transfers. A lot have failed or discovered the useless/inferior nature of glove boxes, but the point is they are speaking from experience. The best way to prove your point is to knock out some amazing, contamination free grows with your glove box, showing that with the same money/time commitment you get better results than other methods.
I promise that Stipe-n cap, et al will shut up and respect you for demonstrating innovation with results. Or if you come back after trying and failing, but learn from that failure, they’ll also respect you. I think what they’re having a hard time with is obstinance sans results.
Welcome and good luck!😊
I no longer care about anyone or anything on this site, in fact I'm going to mog on all of you and never speak a single word of my results. (Already have.)
I'm not surprised the mods muted me for not circle jerking like their butt buddies. Some poor woman came here asking if cat food would work in agar and she gets unsolicited life advice about how shit she is as a wife and mother...
Which is why no one on this forum will ever get any advice from me again. I'm not going to feed them information when all they've ever done is offer whack advice about SABs or teks.
The only reason I'm still here is because I'm keeping a eye out for anyone who's interested in mycology and isn't either a total loser (read morally bankrupt) or corrupted by power.
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