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InvisibleBoogieman47
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Registered: 03/05/16
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Re: Flow Hood [Re: c10h12n2o]
    #24433140 - 06/24/17 11:04 PM (6 years, 7 months ago)

It does blow hot after running for awhile but i think thats just cause its an old motot from like 1960 haha and it is kinda quiet .. i would get a motor off amazon for sure the 1tdt8 or whatever it is, is a 2 speed and would of been perfect for my filter it was 200$


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OfflineCrispykoot
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Re: Flow Hood [Re: Boogieman47]
    #24433661 - 06/25/17 06:01 AM (6 years, 7 months ago)

I'm having a cabinet built today for my 2x4 FP hepa. Its going to be 2 feet deep..

FP pairs a 1600CFM fan with this filter which is 2x the needed amount...They have no explanation except. "We sell thousands  of these with this fan...It works." I said "Math blah blah blah.." They said: "Silence"...."Send us an email that we will never respond to to answer your question." The ususal.


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Offlinespore-ty
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Re: Flow Hood [Re: Crispykoot]
    #24433755 - 06/25/17 07:57 AM (6 years, 7 months ago)

I bought one of FP setup and honestly the fan is bit too strong no noticeable contam yet but now I see why they sell a variable speed adjuster lol


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OfflineCrispykoot
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Re: Flow Hood [Re: spore-ty]
    #24433803 - 06/25/17 08:27 AM (6 years, 7 months ago)

Does anybody know if weatherstripping should be used where the filter sits against the furring on the plenum side of the filter?

My filter has weatherstripping on the side that faces the lab.Just seals against the trim...I don't really understand why they are set up that way...


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Offlinehamloaf
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Re: Flow Hood [Re: Crispykoot]
    #24433817 - 06/25/17 08:35 AM (6 years, 7 months ago)

Mine has that weather stripping on the side that faces the lab too.  I have never heard of weather stripping going along the furring.  :shrug:


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InvisiblebodhisattaMDiscordReddit
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Re: Flow Hood [Re: hamloaf]
    #24433819 - 06/25/17 08:36 AM (6 years, 7 months ago)

because the filter is being pushed towards the lab so the weather strip seals the filter to the front of the hood you build that way.


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OfflineCapnZ
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Registered: 12/22/16
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Re: Flow Hood [Re: bodhisatta]
    #24433841 - 06/25/17 08:46 AM (6 years, 7 months ago)

Quote:

bodhisatta said:
because the filter is being pushed towards the lab so the weather strip seals the filter to the front of the hood you build that way.



:whathesaid:
The static air pressure forces your filter forward creating a seal against the weather stripping.


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Deep into the darkness peering, long I stood there wondering, fearing, doubting, dreaming dreams no mortal ever dared to dream before...


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OfflineCrispykoot
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Re: Flow Hood [Re: CapnZ]
    #24433978 - 06/25/17 09:50 AM (6 years, 7 months ago)

Makes sense. Everything is going to be caulked really well too. Thanks folks.


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Invisiblec10h12n2o
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Re: Flow Hood [Re: Crispykoot]
    #24434670 - 06/25/17 02:57 PM (6 years, 7 months ago)

typically, the weather stripping attached to the filter is supposed to be against the furring

this seal is VERY important on both the lab side and the plenum side, but the part against the furring is absolutely crucial to success

many store-bought hoods do not use the trim sandwich method of securing the filter. my build didnt either, since i patterned it off real ones. i used pins into the filter housing instead of trim to secure it

not only is it important that the weather stripping side be against the furring, ideally it should be TIGHT even compressed against it. i built my pins in a way where they would slant and provide a super tight seal which compressed the weather stripping down a few mm and ensured a perfect seal

the lab side i just secured with plexi silicone, since it was firmly held in place and i was mainly just making sure no air leaked


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C10's Agar Guide + Tips and Tricks | c10's Flow Hood Build Guide


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InvisibleTripping2Adventure
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Registered: 03/28/16
Posts: 371
Loc: Under a Rock, Bottom of t...
Re: Flow Hood [Re: Tripping2Adventure]
    #25362199 - 08/02/18 01:29 PM (5 years, 5 months ago)

I appreciate everyone's help and advice when i planned this out.

A year or so later, I finally have gotten around to buying the materials to assemble this.

Here's some progress pictures. It is not finished, just functional enough to test.


http://

















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InvisibleTripping2Adventure
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Registered: 03/28/16
Posts: 371
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Re: Flow Hood [Re: Tripping2Adventure]
    #25362217 - 08/02/18 01:40 PM (5 years, 5 months ago)

So... this post is made in regards to testing the unit.

I have not attempted to put a speed controller on the fan yet. I am getting plenty of CFM through the filters... the issue is the flow is uneven


around the edges of the filter has the strongest flow, enough to put a lighter out at some spots... other spots just perfect for mycology work.. and then dead spots in the middle.

Is the issue with my plenum? with the separation of flow in-between the two filters? How should i start diagnosing this issue?

I have a few ideas in my head of the problem and what to do... but I want to hear some voices outside of my own head first.


Thanks again!!


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InvisibleLizardWizard
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Re: Flow Hood [Re: Tripping2Adventure]
    #25406858 - 08/23/18 07:45 AM (5 years, 5 months ago)

If you ask me, you should have combined the two filter's static pressure plus the prefilter, making for a total of 2.2" static pressure instead of 1.2". Adding to that, if feels to me like you need a deeper plenum with 2 filters. Looking at the depth and width of your filters, I'd go with a twice as deep total plenum.

I'm not sure though, it might be good to wait for someone with more exp to wage in.

IIRC, uneven flow is caused by dirty old filters, weak blowers, or too small plenums, or all of the above.

Again, correct me if I'm wrong, happy to entertain some debate about it and be proven wrong.


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The best things in life
can be smelled on one's fingers.


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