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Shop: Unfolding Nature Unfolding Nature: Being in the Implicate Order   Mushroom-Hut Grow Bags

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Re: HEPA blower matching question [Re: sandman420]
    #25970528 -

So you need about 400 square inches of surface area for your prefilter to get a proper velocity out of it. For example a 20x20 or 18x24 would do you good.


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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

Extras: Filter Print Post Top
Re: HEPA blower matching question [Re: sandman420]
    #25970665 -

Ah ok! Got it now. Thanks for the help!


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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]
    #25971908 -

You can also size the box so that the inside is just a 1/4" bigger than the prefilter outside size, so that the filter sits inside the top of the box, sitting on a little strip of 1" wide plywood that goes around the inside 1" from the top, like a flange. Instead of just sitting right on 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: HEPA blower matching question [Re: sandman420]
    #25971917 -

That's my plan! I am going to cut a 1/2" strip of plywood and make a little frame inset along that top edge at the depth of my prefilter. I was also thinking I could rabbit the top edge, but I don't trust myself to do that totally evenly around the whole box.


--------------------
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]
    #25971952 -

Yea there's really no need to get fancy with rabbets. You can just buy some "firring strips" also, it's a 1x2 board at home depot etc...if you don;t feel like ripping pita 1/2 strips on the table saw haha. Always kinda sketch ripping thin stuff. Then just screw em to the side with appropriate screws, or even from the outside with inappropriate screws with some protrusion inside.


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

Edited by sandman420 (05/04/19 11:21 AM)

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Re: HEPA blower matching question [Re: sandman420]
    #25972136 -

I'm sure you know this but just to make sure, take care to clean everything really well before you run her with the hepa in. Sawdust and all other general labor filth are tough on the filter. I ran my blower with the prefilter on while getting jiggy with a little brush. Obviously, i did my best to clean things up after constructing the box but it was recommended to me to go the extra mile.


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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]
    #25972320 -

That's a good tip. These filters are way way more fragile than say a HEPA filter for a small room air filter. It's seemingly a totally different material. Debris bouncing around against the backside isn't good for it.


--------------------
- 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]
    #25972624 -

I just picked up a 16"x25" prefilter that should do the trick.

Another question - I'm going to seal the seams of my main HEPA box with silicone caulk. Should I seal my prefilter box as well?


--------------------
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]
    #25972766 -

Yea I put a bead of silicone around where the prefilter box touches the main box, and on the edges where it screws together.


--------------------
- 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]
    #25972931 -

I would. the whole idea is to be totally sure that the only thing that makes it through to your hepa is air going through the filter. So, why not?


--------------------
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]
    #25973097 -

Sounds good! I'll silicone all of it. I thought it would probably be a good idea, but another step on the way to finishing this thing! I'm really excited to get it done so I'm feeling a bit impatient with all the steps plus drying time. 🙃


--------------------
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]
    #25978944 -

I made some serious headway today. Only thing left to do is to silicone the main HEPA into place. The last pic here was just for fitting purposes and everything is looking good!



--------------------
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]
    #25979281 -

That's what I'm talking 'bout Willis.

That's some really nice and clean work friend. Good job. I like the handles like you're gonna be toting it around hahaha.:rasta: Dat filter fit tho....mmmmffff

Careful with those damn minipleat filters I just fucked one of mine up really bad. They are really fragile if you bend the screen up. You can't really seal up damaged areas worth a shit on minipleats because of the screen and how tight the pleats are together. Just be careful hah.


--------------------
- 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]
    #25979284 -

I'm gonna buy you a pocket hole jig for Christmas!


--------------------
- 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]
    #25979524 -

sandman420 said:
I'm gonna buy you a pocket hole jig for Christmas!


Hahahaha, yeah I really could've used pocket holes on this guy. A friend of mine was working on a desk at my place using his pocket hole jig while I was building this, but it didn't occur to me I could do it that way until I was already about 75% finished. 🙃


--------------------
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]
    #25979881 -

Alright. Just glued in the filter, and she's good to go! Just gotta wait for the silicone to dry and its off to the races.



sandman420 said:
Careful with those damn minipleat filters I just fucked one of mine up really bad. They are really fragile if you bend the screen up. You can't really seal up damaged areas worth a shit on minipleats because of the screen and how tight the pleats are together. Just be careful hah.


How did you damage your filter? I just noticed the screen on the front could be pushed up against the minipleats and if pushed hard enough it could do some damage...


--------------------
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]
    #25980075 -

Nice work!:thumbup:


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Extras: Filter Print Post Top
Re: HEPA blower matching question [Re: gimp]
    #25980150 -

I've damaged my filter in quite a few ways. the worse was when i accidentally knocked over a stack of twenty petris and jammed my fingers into the filter trying to catch them.

Looking good man. Nice Job


--------------------
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]
    #25980622 -

I don't really know if I damaged it or I just didn't notice it until after I finished the build and it was shipping/storage damage. It was just a lightly dented area where the screen was mashed into the filter a little bit. Like someone was walking next to the box and accidentally kicked it slightly or something...But you can feel the air blowing strongly from that area. It was a new build that was replacing an older unit...Bah. Got a new filter on order, waiting on it to be built.


--------------------
- 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]
    #25980781 -

:takingnotes:


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The thing about deceit is, you don't know your being deceived...

The only thing I am sure about is that I know nothing - socrates

Believe nothing you hear and half of what u see.

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Shop: Unfolding Nature Unfolding Nature: Being in the Implicate Order   Mushroom-Hut Grow Bags

Mushrooms, Mycology and Psychedelics > Mushroom Cultivation
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