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Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood
    #25763449 -

Hey all

So I have two questions.
As I've posted before I am downsizing my Flow Hood, I love my 18 x 24" cabinet but since I am no longer in the same house I don't have a permanent space for it. Even with the handles it's bulky (it's 26" wide by 27" deep + 20" tall and top heavy)- I can't move it around easy especially with my chronic injury. 12 x 24 will suit my needs just as well.

The HEPA filter I am thinking of buying is one of those "Mini pleat micron" ones, like this: https://fungi.com/collections/cultivation-tools/products/24-x-12-x-5-8-mini-pleat-micron-filter

Says they're packed tighter and it has less resistance.
Anyone ever bought one of these? Likes/dislikes/further info on it?


My next question is about those protective grills for the HEPA. I've seen people build hoods with the grill over the HEPA so you don't crush the pins if you bump it.
Does it disrupt the flow, do they collect contaminants, do you gotta wipe it down before use or can you just run it like normal -that's the kinda stuff I'm wondering about
Also if you do have one, what did you use?

Right on folks , cheers

  -Mushpunx


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Amateur Mycologists United
AMU Q&A

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25763480 -

Look up the filter through the manufacturer they explicitly say they're made for laminar flow applications.


--------------------
Everything you need in one spot.

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25763551 -

bodhisatta said:
Look up the filter through the manufacturer they explicitly say they're made for laminar flow applications.


That is awesome. Thanks

I'm buying one of these anyways, what I'm really curious about is if they are much more fragile than the pin style HEPA. No matter how careful I try to be it seems I eventually bump the filter (my dominant hand was injured real bad a long time ago I drop shit a lot)- little bumps aren't a big deal I just round out the aluminum again, but if it gets hit hard enough it tears up the filter in that spot

That's why I'm thinking about putting a grill on this cabinet.


--------------------

Amateur Mycologists United
AMU Q&A

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25763558 -

Ive had the same concerns about the protective grates but never found any amswers besides seeing them operate and work. There's no documentation or science i could find behind it or to even verify it doesn't mess up the flow. But ive seen a lot of hoods in professional settings with different kinds of protective metal grates


--------------------
Everything you need in one spot.

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Bod's chat thread

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25763901 -

bodhisatta said:
Ive had the same concerns about the protective grates but never found any amswers besides seeing them operate and work. There's no documentation or science i could find behind it or to even verify it doesn't mess up the flow. But ive seen a lot of hoods in professional settings with different kinds of protective metal grates


Hmmm. Thanks man :thumbup:

I guess I'll see when the filter arrives if that is something I want to do or not. Maybe I'll make it easy to remove.

I think for me sacrificing the extra 6" height will be worth the hood being more portable, lighter + easy to store.
I can always tilt spawn bags, not that I use them much. Really I would prefer a wider hood than a taller one anyways.
My filter was practically new and I sold it, and my blower is a Dayton 1TDT2 which is much better suited for a 12 x 24" filter face anyways so I just need to buy a sheet of maple.


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Amateur Mycologists United
AMU Q&A

Edited by mushpunx (01/23/19 06:32 PM)

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25764355 -

The protective grills are fine and not detrimental to laminar flow at all, without it there's always a chance of damaging the filter which is not an option for me considering the price of HEPA filters, my new 24x48" filter cost just over $500 New Zealand dollars.


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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: inski]
    #25764901 -

inski said:
The protective grills are fine and not detrimental to laminar flow at all, without it there's always a chance of damaging the filter which is not an option for me considering the price of HEPA filters, my new 24x48" filter cost just over $500 New Zealand dollars.



24 x 48 is a nice size man!
You built your FH I take it? What did you use for the grate?
I haven't had a chance to look around yet it'd be cool to have an idea of what it's called or where to get it etc


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Amateur Mycologists United
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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25764912 -

Metal grate is what it's called go to home depot its by the metal find one that looks appropriate for flow and protection.


--------------------
Everything you need in one spot.

My Q&A thread. Ask me questions here rather than in Private Message
Bod's chat thread

5g a day keeps the 5g away

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25765098 -

Are you going to sell your old hood??

JJ


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JJ

Draw unto others as they have been drawn to you.... WSP

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25765132 -

mushpunx said:
inski said:
The protective grills are fine and not detrimental to laminar flow at all, without it there's always a chance of damaging the filter which is not an option for me considering the price of HEPA filters, my new 24x48" filter cost just over $500 New Zealand dollars.



24 x 48 is a nice size man!
You built your FH I take it? What did you use for the grate?
I haven't had a chance to look around yet it'd be cool to have an idea of what it's called or where to get it etc


Yes, it's really nice to have that space to work in.
My hood is a fairly highly modified FFU, I'm using it for plant tissue culture (micropropagation) and for working with fungal cultures.
The company I got the filter from has options for the protective grill.
I'll take a photo of the hood at some stage:cool:


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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: newtomyc]
    #25765148 -

My filter came from the factory with wire mesh protecting the filter.
It'll be called "hardware cloth" at the home depot.

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: foragedfungus]
    #25765958 -

foragedfungus said:
My filter came from the factory with wire mesh protecting the filter.
It'll be called "hardware cloth" at the home depot.


Hardware cloth right on man thx


--------------------

Amateur Mycologists United
AMU Q&A

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25765965 -

Hardware cloth is usually a pretty crude galvanized wire mesh. I usually see something more like this

https://www.amazon.com/M-D-Building-Products-57010-Elliptical/dp/B007JD4QEW/


--------------------
Everything you need in one spot.

My Q&A thread. Ask me questions here rather than in Private Message
Bod's chat thread

5g a day keeps the 5g away

Extras: Filter Print Post Top
Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25765999 -

newtomyc said:
Are you going to sell your old hood??

JJ


I had put it up for sale already (minus the blower) and someone had bought it, but even partially disassembled the bulk and weight made it not worth it so I just sold him the filter (was very new).

I still have the cabinet + blower housing, it's built very solid, made of Aspen.
If you are interested and near by ( central NY) could pick it up PM me


--------------------

Amateur Mycologists United
AMU Q&A

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25766042 -

bodhisatta said:
Hardware cloth is usually a pretty crude galvanized wire mesh. I usually see something more like this

https://www.amazon.com/M-D-Building-Products-57010-Elliptical/dp/B007JD4QEW/



Yes that is more like it- and I wouldn't even have to cut it. That helps!

On my last hood I just used wood trim to hold the filter in. If I attach it over that it will sit out from the filter a little - I don't have a ruler handy for reference, I dunno less than 1CM + the thickness of the grate
Anyone know if it's a problem if the grate sits out from the filter some?
I suppose I could use thin metal trim instead of wood this time, fix the grate to that and it would be pretty tight to the filter


--------------------

Amateur Mycologists United
AMU Q&A

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25766074 -

bodhisatta said:
Hardware cloth is usually a pretty crude galvanized wire mesh. I usually see something more like this

https://www.amazon.com/M-D-Building-Products-57010-Elliptical/dp/B007JD4QEW/


A grate like that won't cause turbulence?:shrug:

My filter came from flanders with this mesh over the filter face.


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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: foragedfungus]
    #25766127 -

supposedly not. Ive seen lots of hoods with decorative grating before


--------------------
Everything you need in one spot.

My Q&A thread. Ask me questions here rather than in Private Message
Bod's chat thread

5g a day keeps the 5g away

Extras: Filter Print Post Top
Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25766268 -

I've always wondered if it would collect dust/contams that might blow loose at some point into your media
I mean I suppose you could give the front a quick wipe with a little ISO on a paper towel
I used to hit my filter face lightly with Lysol and let it sit a minute before I turned it on to scrub

I imagine that would be the best you could do unless it was easy to remove


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Amateur Mycologists United
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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25772137 -


look at metal on the hood in this video. this is what I'm used to seeing in all the labs ive ever been in

stuff that looks like it wouldn't work basically


--------------------
Everything you need in one spot.

My Q&A thread. Ask me questions here rather than in Private Message
Bod's chat thread

5g a day keeps the 5g away

Extras: Filter Print Post Top
Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25772176 -

:takingnotes:
I'm surprised that doesn't create turbulence.
Certainly more aesthetically pleasing than the cheap looking wire mesh they came on my filter.

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: foragedfungus]
    #25772191 -

I've actually seen hoods with the fleur de lis pattern in the metal lol


--------------------
Everything you need in one spot.

My Q&A thread. Ask me questions here rather than in Private Message
Bod's chat thread

5g a day keeps the 5g away

Extras: Filter Print Post Top
Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25772210 -

Who's got a laser cutting setup?
I need a mushroom patterned screen for my hood.

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25772756 -

bodhisatta said:
I've actually seen hoods with the fleur de lis pattern in the metal lol


Hah! What is that video, a compounding pharmacy?
I mean if they are using it there it must be alright? On that big grate they even look like they have a couple spots to hang things off of it!

My filter is shipped out tomorrow, I'm still debating using one of these. It's a pretty small filter face, but one of the main points of going smaller instead of larger is so I can move it around, store it if I need to etc.


--------------------

Amateur Mycologists United
AMU Q&A

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25772940 -

Hey Bodisatta lemme run this by you if you don't mind

So for this 12 x 24" I'm planning on just using the Dayton 1TDT2 blower that I already have.

It pushes 360CFM @ .8" and about 240CFM @ 1.0".
What has me hesitating though is that is sinks below 200CFM (I forget how low) @ 1.2"
So if it works at 1.0" it shouldn't be powerful enough to add a pre filter?

This is the same blower/filter combination as the Series 1 RR uses in his videos, and I know he liked to add a pre filter directly to the intake. (But Fungi Perfecti.. I dunno)

Strangely enough this is the blower I used in my 18 x 24" that had me so confused why it seemed to be working so well even with a pre filter on.
Stropharis used the 1TDT2 in his 18 x 24" too and his seemed to worked well too.
My conclusion is that maybe the 18 x 24" filter works at .8" and that's why that blower worked passably (at the suggestion of Blindingleaf I started only leaving the pre filter in while scrubbing the room, not working). 
If that is the case with the 12 x 24 then it should work quite nicely with a decent pre filter attached.

How do I figure out which Static Pressure each filter works at for laminar flow? .8", 1.0" 1.2" etc?


--------------------

Amateur Mycologists United
AMU Q&A

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25773058 -

The filter will have a non changing static pressure given a certain flow rate. The static pressure only increases from clogging up over a lifetime.

You need your filters static pressure at 80-120fpm (laminar flow speed)

If your 12x24 filter has a resistance of 1.7" for example at 100fpm then you would need a blower that pushed 200cfm+ at 1.7+ in.w.g. or better


--------------------
Everything you need in one spot.

My Q&A thread. Ask me questions here rather than in Private Message
Bod's chat thread

5g a day keeps the 5g away

Extras: Filter Print Post Top
Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25773200 -

Where do you find those sort of filter specs though? My last filter didn't come with any
Do you have to contact the manufacturer ?


--------------------

Amateur Mycologists United
AMU Q&A

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25773244 -

Pm me the filter but yea usually i can look tho


--------------------
Everything you need in one spot.

My Q&A thread. Ask me questions here rather than in Private Message
Bod's chat thread

5g a day keeps the 5g away

Extras: Filter Print Post Top
Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25776655 -

Hey Bod so I heard back from FP , this is what they said:

" Micron Filter that you have ordered is a 24x12x5.8 minipleat
The static pressure is 1.00
Rated CFM*: 528/564
Weight: 10.6
Blower to Match: EAFB1 (Dayton 1TDT2)

*Rated CFM indicates the minimum rate of air flow needed for proper filtration."

So the Static Pressure is 1.00", and the blower they recommend is the blower I have, the Dayton 1TDT2.

So at 1.0"sp , it pushes 240CFM. So that's cool, it's 20% above 200CFM.
But not with a pre filter, that's my concern. If it really brings it up to 1.2" it drops way down to like 100CFM.

People don't seem to have problems with the Series 1, I know RR didn't, and he taped a pre filter to the intake.

What do you think man, based on this, should I build with what I have or buy a bigger blower?


--------------------

Amateur Mycologists United
AMU Q&A

Edited by mushpunx (01/29/19 11:45 PM)

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25776848 -

Rated CFM isn't the minimum needed for filtration. If that was true you would be running your 12x24 at 550cfm which is 275fpm out the front which isn't laminar. Laminar flow is achieved between 80-120fpm face velocity. Rated cfm is what they ran it at to scan test it if its from flanders(probably is re-sold flanders)

That blower is fine but maybe too slow 5 years from now when the hepa itself has clogged a bit. But good prefiltration may negate that completely.


--------------------
Everything you need in one spot.

My Q&A thread. Ask me questions here rather than in Private Message
Bod's chat thread

5g a day keeps the 5g away

Extras: Filter Print Post Top
Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25778107 -

Yea man that asterisked bit about Rated CFM was from what they said in the email, not me haha. Confusing statements like that are why I'm always dubious about what FP tells me :lol:

Yea so I'll slap a decent pre filter on this guy. That's what I've really been worried about, that the blower can handle one with this HEPA


--------------------

Amateur Mycologists United
AMU Q&A

Edited by mushpunx (01/30/19 12:43 AM)

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25778170 -

bodhisatta said:
I've actually seen hoods with the fleur de lis pattern in the metal lol


Wonder if I can get this for mine? Be pretty dope.

Or maybe get a machinist to make an LK grille cover similar to the LV design... hmmmm....

Supreme LK...

Could catch on. :lol:


--------------------

:mushroom2: LotKid's PE Tips        :shpongle:    LotKid's Chocolates :mushroom2:
:dancingbear: :dancingbear:

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: LotKid]
    #25778175 -

Ha! Designer FH grills


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Amateur Mycologists United
AMU Q&A

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25778182 -

I like it!


--------------------

:mushroom2: LotKid's PE Tips        :shpongle:    LotKid's Chocolates :mushroom2:
:dancingbear: :dancingbear:

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: LotKid]
    #25778494 -



pro hood grate for reference


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- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: sandman420]
    #25778495 -

weird to have a outlet in the flow path.


--------------------
Everything you need in one spot.

My Q&A thread. Ask me questions here rather than in Private Message
Bod's chat thread

5g a day keeps the 5g away

Extras: Filter Print Post Top
Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25778498 -

This model is typically used for IV drug compounding with an IV bag hanging from a bar that goes across the top.


--------------------
- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed

Extras: Filter Print Post Top
Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: sandman420]
    #25778506 -

sounds like a fun way to make a coke habit more interesting


--------------------
Everything you need in one spot.

My Q&A thread. Ask me questions here rather than in Private Message
Bod's chat thread

5g a day keeps the 5g away

Extras: Filter Print Post Top
Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: bodhisatta]
    #25778543 -

LOL I suppose so!


--------------------
- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed

Extras: Filter Print Post Top
Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: sandman420]
    #25779393 -

Most come with outlets in the work area like that. It's usually standard and not an upgrade option.


--------------------

:mushroom2: LotKid's PE Tips        :shpongle:    LotKid's Chocolates :mushroom2:
:dancingbear: :dancingbear:

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: LotKid]
    #25779604 -

I guess you could plug in one of those electric sterilizers there, or a light of some sort I dunno

So I am still wondering if I can pull off using like a Filtrete type pre filter with this blower. Most people with it do, FP said it's fine etc. It pushes 20% over at 1.0" (240CFM) but the graph shows such a big drop above 1.0"-  at 1.2" it drops to around 100CFM
Wouldn't that be unacceptable?


--------------------

Amateur Mycologists United
AMU Q&A

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25780234 -

I like plugging my impulse sealer into the outlet in the work area. :thumbup:


--------------------

:mushroom2: LotKid's PE Tips        :shpongle:    LotKid's Chocolates :mushroom2:
:dancingbear: :dancingbear:

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood *DELETED* [Re: LotKid]
    #25794400 -

Post deleted by mushpunx

Reason for deletion: I have this in a separate thread, too confusing for readers


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Amateur Mycologists United
AMU Q&A

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25809629 -

Maybe it's an overkill, but have you considered using an aluminium honeycomb? That would help with keeping the flow laminar. There might be other issues with it that I'm completely ignorant about, since I'm a total noob.


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How I do glass dishes

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: poisoned]
    #25810200 -

What's an aluminium honeycomb?


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Amateur Mycologists United
AMU Q&A

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25814970 -



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How I do glass dishes

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: poisoned]
    #25815174 -

Wow man would you look at that! What is it used for ?


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Amateur Mycologists United
AMU Q&A

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: mushpunx]
    #25815199 -

They are used for achieving laminar air flow, amongst other things.


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I have left life and loves behind me, to be blown about as the sea desires, to have the freedom of the open air, and to be witness to the making of the world.

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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: poisoned]
    #25815528 -

poisoned said:



You shouldn't have to put anything like that in front of your filter if you got the correct filter, they are designed to produce laminar flow.
If your blower is properly matched with the filter and is configured in an appropriate manner on the plenum or your unit employs a baffle system inside the plenum you shouldn't have a problem.
The company I purchased filters from have options for protective mesh across the front of the filter, if you decide to fit your own I don't think it will effect laminar flow if it is a centimeter or so away from the filter.


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Re: Questions about "Mini pleat Micron HEPA filter + also using a rotective grill for Flow hood [Re: inski]
    #25875794 -

So I found what I was looking for at Lowes actually for 10$! I missed it a couple times, it was folded inside white cardboard and the sales guy kept insisting they had "Nothing like that here" haha.

It's 1' x 2', I might have to trim off a tiny bit but I think I can manage with tin snips, it's pretty thin.

It's sturdy enough to stop hands from accidentally banging into the filter face, maybe even more but it will bow inwards with enough force so I wouldn't like kick it or anything :lol:
Still is a good enough grate for a mobile flow hood.

Also bought some nice (5 ply?) Birch wood to build this sucka.



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Amateur Mycologists United
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