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Offlinecybork
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Room for ideas: look at my Optimum Prime Luminar Flow Hood
    #28553520 - 11/23/23 05:15 AM (2 months, 3 days ago)

Edit: **OK this does thing is not luminar. This set up will not give you a laminar flow***

I want to share this flow hood I built. This transformer luminar flow hood box transforms from a stealth wooden box to a flowhood with a table/work bench. It could also be used a a pop-up flow hood. I gave this child a name: Optimum Prime. Maybe this setup is of interest and gives room for ideas for others. It might also be a replication of other's thoughts, if so, I am not aware. If it is a replication: let me/us know in the comments.

My OPLFM is not 100% perfect by any standards, but my contamination levels dropped significantly to actually 'none' till so far, when fan was on. And it costs me not so much money. If you have time, some money and some left over stuff, maybe this can inspire you.

Regarding contamination:
I did about 50 petridishes till now. On those dishes I did drops of clean and QC'd LC. None had contamination. I also benchmarked the workings to 6 petridishes on the same working space, by having the lid open of those 6, no LC droppings to them, and without the fan blowing. 3 of those 6 showed contamination after a 3 weeks period. To me that marks a successful flow hood. Still, could all be coincidence. Anyways, I also did some other successful LC to LC work behind the OPLFH, but I won't count that for conclusions about the correct workings of the LFH.

Recipe:
-a normal (but quite robust and heavy) left over fan
-left over wood plates
-left over wood balks
-a left over piano hinge
-2 new HEPA filters that I got in a sale (2 for the price of 1) (it is the Philips NanoProtect Filter Series 3 FY1410)
-lots of left over screws
-left over silicon kit
-left over acrylic kit
-left over white primer paint
-left over high gloss white paint
-a lot of left over time
-a marker
-an elastic band
-some nails and a nail gun
-circular saw (I didn't have this one available all the time in house during the build, so don't judge me on the not so tight parts)
-jigsaw (do blame that for the not so tight parts)

The pictures speak for themselves I think. The amalgamation of the filters I'd do differently now. I spent too much time and redundant material on making that. I would also leave out the acrylic kit; better to use only the silicon kit, as the acrylic tends to dry up more shrinked. Could also be due to my unhandiness.

Sizes are: 61cm x 45cm x 44cm (W x H x D).

I like the idea of a protective shell protecting the filters against accidental puncture, but also against unnecessary polluting particles when storing. It stores pretty nicely and one can even use tape on the openings if one really thinks he/she/LGBHTQ/^[A-Za-z0-9_.]+$ needs to. I don't tape the openings.

I thought about having a pre-filter (for the air intake) to pre-filter some debris, but that needs me to have a more powerful fan. This fan is just able to have (what I think) a good airflow: the lighter flame is lightly bend till about 30cm on the working space or so when fanning on level 2. And what I understand of laminar flow, that means it is good: it is then laminar and not spiral. The airflow speed is not everywhere identical, and that is due to the set up. Having a divider for the air flow would solve that issue, but that would require also a more powerful fan and probably more box volume.

I added an elevated working area in OP's belly. During the Tsche-chu-chu-chu-tsche, that working area finds it's way on the table. That elevated working area will be more clean than the table, because that working area is flatter, so, better to sanitise. I also believe a bit elevation just lets less particles from the ground flow into my material. But that is maybe more a thought than fact.

You see lines on the working space, more for me to be mindful of where to put objects: I assume the more near to the filter, the cleaner.

The complete set up is placed on a diner table, and the working table then hangs over. A part of the working table is supported by the diner table. The bridge would make it unnecessary to have a piece of the bridge be supported by the table, and theoretically I could use a foldable support to hold the set up in itself. This pop-up-everywhere possibility will be one of my future improvements on this thing. If I have thought enough I will add the feature, and will also add some pics to this post.

Here it is:
During stasis:


Tsche-chu


chu-chu


tsche


Kind of 360 degrees view:










tsche


Closed and on it's side 1:


Closed and on it's side 2:


Soles:


Edited by cybork (11/23/23 10:33 AM)


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InvisibleScrimshaw
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: cybork]
    #28553669 - 11/23/23 08:16 AM (2 months, 3 days ago)

Not to shit on your efforts here, but why do all that work to build something that isn’t anywhere near laminar flow? That looks like a fan in a box with a couple furnace filters slapped on the front.

50% of your test plates contaminating is not an acceptable level of success. I leave plates in front of my flowhood wide open for 5 minutes, reseal them, and they never contam. That is the measure you should be shooting for.

Post pics of your plates before and after a test like that before declaring success. Otherwise, I’d go back to the drawing board and either buy a FFU or build a true laminar flow hood using a 6” hepa filter like many of the proven teks on here.


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OfflineKinoko314
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: Scrimshaw]
    #28553680 - 11/23/23 08:21 AM (2 months, 3 days ago)

  :androidlol:

This contraption is as much a flow hood as this pic is a frog. :catfrog:


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OfflineDERRAYLD
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: Kinoko314]
    #28553747 - 11/23/23 09:13 AM (2 months, 3 days ago)

Is that a normal fan?

With all due respect,  did you even bother to understand what is required when using a hepa filter?
Is that even a hepa?

This is almost an insult tbh.


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Offlinecybork
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: Scrimshaw]
    #28553765 - 11/23/23 09:19 AM (2 months, 3 days ago)

Not to shit on your efforts here, but why do all that work to build something that isn’t anywhere near laminar flow? That looks like a fan in a box with a couple furnace filters slapped on the front.
>>yes, it is basically a fan in a box, and it draws and pushes air. I think it pushes the air through *laminar*. Could be wrong there though. My 'test' for that was gas lighter. Those filters are 0,02 µm by the way.

50% of your test plates contaminating is not an acceptable level of success. I leave plates in front of my flowhood wide open for 5 minutes, reseal them, and they never contam. That is the measure you should be shooting for.
>>my bad. Too much text. Let me explain better: those testplates were plates at the place of the workbench, but with the fan off. The other 50 plates were handled with the fan on. None of those 50 had contamination.

Post pics of your plates before and after a test like that before declaring success. Otherwise, I’d go back to the drawing board and either buy a FFU or build a true laminar flow hood using a 6” hepa filter like many of the proven teks on here.
>>I'll do a test of 5 mins with fan on, and come back to that. That is what you mean, right? My 50 plates wouldn't count then, for sure I didn't had those plates open for 5 minutes.


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Offlinecybork
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: DERRAYLD]
    #28553768 - 11/23/23 09:22 AM (2 months, 3 days ago)

It is a quite heavy normal fan. Whatever one considers normal. Ha!

Yes it is HEPA.

It works. Why is it an insult. To be honest?!


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Offlinecybork
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: Kinoko314]
    #28553770 - 11/23/23 09:23 AM (2 months, 3 days ago)

I had too lough at that from  :androidlol:

This contraption is as much a flow hood as this pic is a frog. :catfrog:

Brilliant.


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OfflineRockinRobot
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: cybork]
    #28553776 - 11/23/23 09:28 AM (2 months, 3 days ago)

IMHO you could have spent $10 on a 110qt tub and made a SAB that will give you better results.

Won't even try to explain to you why that isn't close to laminar flow.


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OfflineDERRAYLD
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: cybork]
    #28553779 - 11/23/23 09:30 AM (2 months, 3 days ago)

Not even interested in debating to be honest.

It's quite a heavy fan?

Dude please, this is literally insulting to everyone that takes the time to comprehend basic pressure.

You're pissing on lots of people here... I'm done.


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Offlinecybork
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: RockinRobot]
    #28553784 - 11/23/23 09:32 AM (2 months, 3 days ago)

Well, as far as I understand a laminar flow hood is a thing that blows air through a HEPA filter, and the air out of it goes laminar.

I don't get why it would not tick that definition.


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OfflineDERRAYLD
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: cybork]
    #28553795 - 11/23/23 09:35 AM (2 months, 3 days ago)

Go figure out why.


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InvisibleStipe-n CapMDiscord
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: cybork]
    #28553805 - 11/23/23 09:43 AM (2 months, 3 days ago)

Quote:

cybork said:
Well, as far as I understand a laminar flow hood is a thing that blows air through a HEPA filter, and the air out of it goes laminar.

I don't get why it would not tick that definition.




There is a sticky at the top of the forum, for your convenience. You will find all of the pertinent information re laminar flow and cheap boxes.


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OfflineRockinRobot
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: cybork] * 1
    #28553855 - 11/23/23 10:18 AM (2 months, 3 days ago)

Quote:

cybork said:
Well, as far as I understand a laminar flow hood is a thing that blows air through a HEPA filter, and the air out of it goes laminar.

I don't get why it would not tick that definition.





I am just coming up on my first year anniversary of growing and I have gone from Jars that look like this.



To flushes of exotics that look like this:




Simply by listening to these guys. Yet all I hear you do is claim to know more and tell them they have no clue what they're talking about. Get some humility. Learn the basics.


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Offlinecybork
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: Stipe-n Cap]
    #28553860 - 11/23/23 10:22 AM (2 months, 3 days ago)

Thanks Stip-n Cap. That https://www.shroomery.org/forums/showflat.php/Number/27615199 is insightful.

My setup is not luminar.  Damn.

I just tried to replicate what on that link is shown in video 'Laminar flow hood smoke test' with an incense stick (fuck me, for saying that, is that the next thing to be spit upon, is that even allowed?), and only a little part of the filter appears to have luminar flow after it.

Ok, back to the drawing board. Fuck.


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Offlinecybork
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: RockinRobot]
    #28553865 - 11/23/23 10:25 AM (2 months, 3 days ago)

No RockinRobot, I don't try to claim I know more and also not telling 'them' that they have no clue what they're talking about.


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Offlinecybork
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: cybork]
    #28555779 - 11/25/23 08:18 AM (2 months, 1 day ago)

Yes, I learn! After a first urge to discard the thing and make further use of it as a paperweight, I decided to make some adjustments. So I took the floor fan out, and brought in an inline fan, plus a speed controller.

I think I now really do have laminar flow! Or, is it a Boxfan/Blowhood?

I did some testing with some incense sticks, and in some days I will do some cleanliness testing with petridishes. For now what I think is a steady and good looking flow, seems to be gotten from a speed setting on somewhere between 600 and 800 m3/hr. I base that on how far the speedcontrol button is turned. But that means shit. I'll probably get myself an anemometer soon. And some lighting to better see and register how it flows. I'll have to study a bit more about those workings.

Thanks for the learning curve. Tell me if and when and where I still have something wrong.

PS: next thing might very well be to buy a HEPA, *designed* for luminar flow...





























Edited by cybork (11/25/23 08:45 AM)


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OfflineRockinRobot
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: cybork]
    #28555809 - 11/25/23 08:48 AM (2 months, 1 day ago)

You still won't have laminar flow. If you go take a look at the true filters for laminar flow hoods they are all made with metal guides. Theses are what provide the laminar flow. NO "HEPA" filter will provide Laminar flow no matter what fan you put behind it.


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Offlinecybork
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Re: Room for ideas: look at my Optimum Prime Luminar Flow Hood [Re: RockinRobot]
    #28555819 - 11/25/23 08:54 AM (2 months, 1 day ago)

Yeah. I think I will get one of those in a new build.


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