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Re: HEPA blower matching question [Re: Geinstein]
    #25852040 -

Geinstein said:
Just saving for later. . .


:whathesaid::takingnotes:

Just when I think i got hoods figured out:shake: cool info here.


--------------------
:hypnotoad:
Making Liquid Culture :  Go insane with LC
Mushboy likes these teks : Making shroom tea
Dank Education

Extras: Filter Print Post Top
Re: HEPA blower matching question [Re: verum subsequentis]
    #25852042 -

verum subsequentis said:
i agree. actually, I value a good ol open plate test more than a lighter test. It's my go to. Anytime i question my filter or flow i just do a ten minute plate test. The results are undeniable.


The plate test being putting an open plate in front for 10min and seeing if it grows any contams?


--------------------
PC's LAGM 2021 (TOC & TWC)
P. natalensis Growlog 2021
Pans for PC Fall 2021 Growlog

“I must not fear. Fear is the mind-killer. Fear is the little death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain.” - Bene Gesserit Litany Against Fear


Extras: Filter Print Post Top
Re: HEPA blower matching question [Re: PitcherCrab]
    #25852078 -

There is plenty of reason to use a manometer/magnehelic. Such as telling when your filter is ready for the trash and if there are any leaks. Not the only way obviously. But it also looks cool and is cheap. You can also use it to make sure your airflow is where you want it when you first set it up because it will have a certain static pressure at a certain speed. So if you are hitting that SP then you know you have the right air speed.


--------------------
- 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: HEPA blower matching question [Re: PitcherCrab]
    #25852108 -

PitcherCrab said:
verum subsequentis said:
i agree. actually, I value a good ol open plate test more than a lighter test. It's my go to. Anytime i question my filter or flow i just do a ten minute plate test. The results are undeniable.


The plate test being putting an open plate in front for 10min and seeing if it grows any contams?


Yes, i actually like to put quite a few out to make sure all areas are good. something like this

fitler
----------------------------------------
      plate      plate      plate
   
      plate      plate      plate


--------------------
Masters and slaves hunting clones        How not to isolate (it worked, but)


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Re: HEPA blower matching question [Re: mushboy]
    #25853414 -

mushboy said:
Geinstein said:
Just saving for later. . .


:whathesaid::takingnotes:

Just when I think i got hoods figured out:shake: cool info here.


Cool indeed
I want to make mine a little different
With air intake from outside go through 2 pre filters(just to save life time of the HEPA nothing else)
And make the room positive pressure


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


Nothing breads nothing

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Re: HEPA blower matching question [Re: PitcherCrab]
    #25866256 -

PitcherCrab said:
sandman420 said:
There should be a matching mounting bracket available but I can't seem to locate it. Give Grainger a call and they will get you sorted on one.


I emailed Grainger about the bracket for the 1TDU2. This is what they said:

"The 5TCJ3 is a support that is listed to work with your 1TDU2 blower.  It says on the internet that it Is for use with the 1XJX8 and 1XJX9 but our system says it will also work with the 5TCJ3."


So I got the Dayton 5TCJ3 supports and they don't fit the bottom of the blower as I thought they would. For all of you with this blower, how did you mount it to your flow hood cabinet?

I found a custom bracket mount made of angle iron sold by Fungi Perfecti, but its like $55 + $20 shipping, really steep if you ask me (just like all of their products). They call the 1TDU2 blower "EAFB2" and the custom bracket "EAFB2-B".


--------------------
PC's LAGM 2021 (TOC & TWC)
P. natalensis Growlog 2021
Pans for PC Fall 2021 Growlog

“I must not fear. Fear is the mind-killer. Fear is the little death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain.” - Bene Gesserit Litany Against Fear


Edited by PitcherCrab (03/10/19 06:24 PM)

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Re: HEPA blower matching question [Re: PitcherCrab]
    #25866554 -

That is pretty shitty that they told you it would fit and doesn't. I called Grainger recently and was able to get patched through to an "expert" or some such shit since the lady that answered didn't know anything about anything. Maybe call them back up and ask to talk to an expert on the blower fans and explain. They are the manufacturer, there is no such thing as dayton any longer, grainger bought them years back. So they should know how to mount their own damn fan, damn. That's lame.


--------------------
- 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: HEPA blower matching question [Re: sandman420]
    #25866560 -

It's also possible you aren't trying to install the brackets correctly and they do actually fit but I trust that you could figure that out.


--------------------
- 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: HEPA blower matching question [Re: sandman420]
    #25866564 -

Just use some silicone or make a flange with some foil tape and L brackets to hold it


--------------------
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: HEPA blower matching question [Re: bodhisatta]
    #25866623 -

Yea it would be pretty easy to get some 6" L brackets from the hardware store and use self drilling sheet metal screws with washers to mount to the side of the blower where it doesn't interfere with the wheel. Make sure to shake out any metal fragments before you mount it, you don't want those to potentially bounce around in your plenum. Then you can use foil tape to seal the gap where it sits over the hole in your plenum top, or expanding can of foam (blue lid) would make a better seal, the tape could not seal up well under pressure over time.


--------------------
- 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: HEPA blower matching question [Re: sandman420]
    #25866702 -

That tape is made to seal the same or higher pressure at much higher temperatures basically indefinitely.


--------------------
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: HEPA blower matching question [Re: bodhisatta]
    #25866733 -

I have had the adhesive come off for apparently no reason after a few months before when taping the seams on rigid insulation panels. Even layed it down reaaaal hard with a plastic squeegee. Just in a few spots, not sure what the deal was. I could see it not sticking up real well on plywood.


--------------------
- 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: HEPA blower matching question [Re: sandman420]
    #25885481 -

Yo PitcherCrab, did you ever get her fingered out?


--------------------
- 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: HEPA blower matching question [Re: sandman420]
    #25968928 -

Alright! So I have some updates here. I've made a box out of 3/4" red oak vaneer ply and mounted the brackets to my blower using self drilling metal screws. Right now I'm waiting for my clear poly coat to dry before I mount the blower.

I built a frame in the box the HEPA will be seated against and siliconed to, and I'm going to silicone all the internal seams before I fit the filter. I got the fit almost perfect. There is about 1/8" of play vertically and horizontally its about 1/32". :grin:

My plan for the pre-filter is to build a box around the blower and use a 14"x14" pre-filter in one of the sides. I'm not really sure the best way to go about doing this... do you guys have any tips or thoughts before I start?

I was thinking maaaaybe I could get around making a pre-filter box by just making a plywood "plate" with the pre-filter attached and then using industrial strength velcro to attach it directly over the air intake. But then I noticed there are quite a few little holes all over the blower housing. I'd really like as much of the incoming air to go through my pre-filter as possible as I'll be using this thing in my garage and I'd like to keep all the dust particulate out of my nice HEPA. If any of you have any tips about getting around building a separate box on top that would also be super helpful.

Here are some photos of what I've got going on so far:


--------------------
PC's LAGM 2021 (TOC & TWC)
P. natalensis Growlog 2021
Pans for PC Fall 2021 Growlog

“I must not fear. Fear is the mind-killer. Fear is the little death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain.” - Bene Gesserit Litany Against Fear


Edited by PitcherCrab (05/02/19 07:29 PM)

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Re: HEPA blower matching question [Re: PitcherCrab]
    #25969015 -

for anyone who needs help matching your filter to a blower, this video explains it well.

https://www.youtube.com/watch?time_continue=1&v=cDaJW77Wb5Q


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Re: HEPA blower matching question [Re: gimp]
    #25969998 -

That's a 2 x 4 filter, yeah. I think you'll want a bigger prefilter and pre filter housing box. Or go with that and put two prefilters on it.

i built my own 2 x 4 hood and it was not achieving laminar flow at first. I called some folks and did some reading and found that i wasn't allowing enough air through the prefilter and effectingly choking the blower. I then cut the back side of the prefilter housing out and duct taped another (i forget the size but it was around the size you are planning on) filter to the back.

I talked to the folks at perfecti and they said they use huge prefilters on their 2 x 4 hoods. I think they said 25 x 16 (don't quote me on that) or something close.

I built my box around the blower and  built a backing (just like you did for the hepa) that the prefilter sets down on. Then i built a little rectangular frame with weather stripping on it that sets down on the prefilter and screws tightly into place.


--------------------
Masters and slaves hunting clones        How not to isolate (it worked, but)


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Re: HEPA blower matching question [Re: verum subsequentis]
    #25970141 -

verum subsequentis said:
That's a 2 x 4 filter, yeah. I think you'll want a bigger prefilter and pre filter housing box. Or go with that and put two prefilters on it.

i built my own 2 x 4 hood and it was not achieving laminar flow at first. I called some folks and did some reading and found that i wasn't allowing enough air through the prefilter and effectingly choking the blower. I then cut the back side of the prefilter housing out and duct taped another (i forget the size but it was around the size you are planning on) filter to the back.

I talked to the folks at perfecti and they said they use huge prefilters on their 2 x 4 hoods. I think they said 25 x 16 (don't quote me on that) or something close.

I built my box around the blower and  built a backing (just like you did for the hepa) that the prefilter sets down on. Then i built a little rectangular frame with weather stripping on it that sets down on the prefilter and screws tightly into place.


I don't totally understand... Was the prefilter blocking too much air so you weren't getting laminar flow? I know this blower is quite a bit overpowered for my HEPA + prefilter, so I'm not too worried about reaching velocity. I did quite a bit of research matching performance curves etc before pulling the trigger on it. If anything I'm worried about it being too powerful.

And as far as prefilter size goes, did the FP people say they used a large prefilter to provide bigger surface area for the blower to pull from?

I bought a 14"x14" prefilter as I thought that would be an appropriate size to fit into one of the sides of the prefilter box I'm planning on making. Is there any danger of that being too small?


--------------------
PC's LAGM 2021 (TOC & TWC)
P. natalensis Growlog 2021
Pans for PC Fall 2021 Growlog

“I must not fear. Fear is the mind-killer. Fear is the little death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain.” - Bene Gesserit Litany Against Fear


Extras: Filter Print Post Top
Re: HEPA blower matching question [Re: PitcherCrab]
    #25970384 -

Sorry if i wasn't clear. Yes, the pre filter was only allowing s much air through and effectivly limiting the amount that was allowed through the blower. FP advised me to take the pre filter off and do a laminar flow check. I did so and it tested well. I tried to find the email from them earlier so that i could tell you the exact filter size that they recommended but i can't find it.

I'm done with my sterile session now so i'll go check the size of my pre filter and let you know what i had originally put on there and found to be too small.


--------------------
Masters and slaves hunting clones        How not to isolate (it worked, but)


Extras: Filter Print Post Top
Re: HEPA blower matching question [Re: verum subsequentis]
    #25970414 -

So, my pre filter is 20 X 16. I'm no expert on laminar flow. I'm just relaying a little information. I ran it with that filter and wasn't achieving flow, talked to FP about what setting they wire the blower on (1/2 horse 4 speed blower) and what size their prefilter was, and found that i need to allow more prefiltered air in to achieve laminar flow. So, i cut the back of the filter housing out and literally duct taped another filter to it (14 x 14). After making said changes i achieved laminar flow.

You could call FP and ask what size they use.


--------------------
Masters and slaves hunting clones        How not to isolate (it worked, but)


Extras: Filter Print Post Top
Re: HEPA blower matching question [Re: verum subsequentis]
    #25970491 -

I think you want your prefilter to run approx. in the 300 fpm area. 800cfm (2x4 filter at 100 fpm) through 14x14 is something like 690 fpm so that is too small. I like to build the prefilter box so that it has an open top and the box is sized that a filter just sits on the top. The force of the air going through it holds it down really good. Just figure your prefilter size and build the box to fit.


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