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Offlineunregistered
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How was your first DIY flow hood like and should I just get a ready made one?
    #25997105 - 05/16/19 11:50 PM (5 years, 7 months ago)

Worked on my first flowhood and have not even finished it but am feeling kinda bummed about it, it didn't turn out exactly as I expected, the corners are so misaligned. Should I just abandon the project and just shell out the shekels to get one ready built from fungi perfecti instead?

Here are some pics:
















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OfflineXerbia
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: unregistered]
    #25997127 - 05/17/19 12:17 AM (5 years, 7 months ago)

Yours looks fine. Just make sure to use silicone to seal any cracks.

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Offline174BPM
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: Xerbia]
    #25997142 - 05/17/19 12:55 AM (5 years, 7 months ago)

Looks fine. If the overhang bothers you that much, mask off the filter and sand them down!

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Offlineunregistered
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: unregistered]
    #25997232 - 05/17/19 02:34 AM (5 years, 7 months ago)

I am using 3/4" thick plywood and the fan is quite heavy, will it be able to take the weight in the long run?




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Offlinesouthbounpachyderm
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: unregistered]
    #25998346 - 05/17/19 04:54 PM (5 years, 7 months ago)

I think the rubber is supposed to be in the back not the front, butted against the wood. That may let air through. At least I've never seen one that doesn't have dual rubber with the rubber facing out.


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Offlineunregistered
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: southbounpachyderm]
    #25999113 - 05/18/19 04:53 AM (5 years, 7 months ago)

Quote:

southbounpachyderm said:
I think the rubber is supposed to be in the back not the front, butted against the wood. That may let air through. At least I've never seen one that doesn't have dual rubber with the rubber facing out.



Do you mean the black foam thing on the hepa filter should be facing the back instead?

But this video shows it facing the front:

Edited by unregistered (05/18/19 04:55 AM)

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Invisiblesandman420
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: unregistered]
    #25999169 - 05/18/19 05:54 AM (5 years, 7 months ago)

The filter will have a flow direction lable on it...


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Invisiblerickyswamps
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: sandman420]
    #25999231 - 05/18/19 07:01 AM (5 years, 7 months ago)

Just take your time with it.  The most important part is that its all sealed. If you messed up some holes, fill with silicone or wood sealer.  3/4 inch plywood will support the filter.  I probably would have built the top piece resting on the sides for support, but once you finish the furring strips all the way around it will be stronger. 

My filters direction arrow puts the foam on the frontside.

Id also do my screws different.  Its much easier to go straight through the sides than from the top at an angle.  Make sure to predrill and countersink if you have the bit.

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Invisiblesandman420
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: rickyswamps]
    #25999255 - 05/18/19 07:18 AM (5 years, 7 months ago)

He is using pocket holes for his screws rickyswamps...but strangely. Pocket holes are the absolute shit, way stronger than a screw through the side! Greatest things since sliced bread, love em. Really good for making wood boxes.

Typically you would have the pocket holes on the inside so you cant see them...and there would be more of them. I can only see those 2 on the top piece, I can't really tell how all it is held together. Hopefully there are many more.

You can use 2 2x4s going vertically, wedged under the blower next to the opening to support the blower weight if it sags.

You dont seem to have much stick out for the gasket to press and seal. Might want to consider just siliconing it all around the filter real good and now its a one piece permanent filter. You dont want leaks. Then ur on the way to finishing the prefilter box and done.


--------------------
- 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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OfflineMycologist217
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: sandman420]
    #25999394 - 05/18/19 08:16 AM (5 years, 7 months ago)

The first one I built sucked but it worked okay...looked like shit...worked okay...


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Offlinenewtomyc
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: unregistered]
    #25999401 - 05/18/19 08:18 AM (5 years, 7 months ago)

Quote:

unregistered said:
I am using 3/4" thick plywood and the fan is quite heavy, will it be able to take the weight in the long run?








3/4 plywood is some strong stuff. I'm sure it will support that fan longer than you need it to.


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Offlinegimp
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: newtomyc]
    #26000668 - 05/18/19 10:02 PM (5 years, 7 months ago)

nothing wrong with it, like others said use some silicon if you like, you can silicone around the edges at the back side of the filter if you want. My first one was a lot uglier, but it worked.


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Offlinesouthbounpachyderm
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: gimp]
    #26001765 - 05/19/19 02:55 PM (5 years, 7 months ago)

Mines pretty ugly but it works. I silliconed the fuck out of every edge... I would personally sillicone around it but I don't know shit and if it works it works.
Building a lighted box next and a box for my non slip mat :laugh:


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Edited by southbounpachyderm (05/19/19 02:57 PM)

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Offlineunregistered
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: sandman420]
    #26010717 - 05/24/19 08:04 AM (5 years, 7 months ago)

Quote:

sandman420 said:
He is using pocket holes for his screws rickyswamps...but strangely. Pocket holes are the absolute shit, way stronger than a screw through the side! Greatest things since sliced bread, love em. Really good for making wood boxes.

Typically you would have the pocket holes on the inside so you cant see them...and there would be more of them. I can only see those 2 on the top piece, I can't really tell how all it is held together. Hopefully there are many more.

You can use 2 2x4s going vertically, wedged under the blower next to the opening to support the blower weight if it sags.

You dont seem to have much stick out for the gasket to press and seal. Might want to consider just siliconing it all around the filter real good and now its a one piece permanent filter. You dont want leaks. Then ur on the way to finishing the prefilter box and done.




I'm using 4 pocket screws for each side combined with wood glue to hold them together

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Offlineunregistered
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: southbounpachyderm]
    #26010720 - 05/24/19 08:08 AM (5 years, 7 months ago)

Quote:

southbounpachyderm said:
Mines pretty ugly but it works. I silliconed the fuck out of every edge... I would personally sillicone around it but I don't know shit and if it works it works.
Building a lighted box next and a box for my non slip mat :laugh:




What's a lighted box for?

In the pic of your flow hood, shouldn't the gasket be in front instead? Did you check the arrow on the filter which way it goes?

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Invisiblesandman420
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: unregistered]
    #26010725 - 05/24/19 08:16 AM (5 years, 7 months ago)

Some filters have no gasket, some have on the front and some on the back. When you are buying random ebay filters you take what you can get I guess. That's why he siliconed around it.


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

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Offlinesouthbounpachyderm
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: unregistered]
    #26011885 - 05/24/19 11:34 PM (5 years, 7 months ago)

Lighted box will be for setting plates ontop of and being able to clearly see the sectors and anything possibly hiding underneath. Think a piece of opaque plastic ontop of 2x4 with LED lighting pointed up at the semitranslucent sheet of plastic/plexiglass/what have you. From everything I read the gasket goes butted up against the wood that separates your plenum and the filter itself.

There are double gasket filters but I figured a tight fit and a bit of silicone would make that feature a bit useless. The gasket goes on the inside to prevent air leakage and allow the plenum to achieve the proper pressure for laminar flow. It stops air from going anywhere besides thru the filter. The silicone was really just over kill. I literally siliconed every edge inside and out. Since I do construction for a day job I have tons of silicone around always.

Edit: Yes of course I checked which way the flow arrow on a filter pointed... This filter is designed so that the gasket is in the back. I would be more worried if it wasn't because in theory  non filtered air could find its way out thru little cracks or imperfections.

Here's an example of a similar build from a TC.
https://www.shroomery.org/forums/showflat.php/Number/21518893

Personally I would be more worried with the gasket facing outward if it was not a dual gasket filter.


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Edited by southbounpachyderm (05/24/19 11:42 PM)

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InvisibleLotKid
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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: southbounpachyderm]
    #26011892 - 05/24/19 11:40 PM (5 years, 7 months ago)

Your first flow usually isn't the prettiest. So don't feel bad.


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Re: How was your first DIY flow hood like and should I just get a ready made one? [Re: LotKid]
    #26600946 - 04/14/20 04:13 PM (4 years, 8 months ago)

It doesn't have to look pretty :smile:


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