Home | Community | Message Board

MRCA Tyroler Gluckspilze
This site includes paid links. Please support our sponsors.


Welcome to the Shroomery Message Board! You are experiencing a small sample of what the site has to offer. Please login or register to post messages and view our exclusive members-only content. You'll gain access to additional forums, file attachments, board customizations, encrypted private messages, and much more!

Shop: PhytoExtractum Kratom Powder for Sale   Kraken Kratom Red Vein Kratom   Bridgetown Botanicals CBD Concentrates   OlympusMyco.com No Unicorns Here—Just Quality Bags That Work   Left Coast Kratom Buy Kratom Extract   North Spore Injection Grain Bag   Myyco.com Isolated Cubensis Liquid Culture For Sale

Jump to first unread post Pages: 1 | 2 | Next >  [ show all ]
Some of these posts are very old and might contain outdated information. You may wish to search for newer posts instead.
Offlinecamplo
Freedom!


Registered: 02/10/08
Posts: 1,675
Last seen: 3 years, 3 months
Flow Hood help
    #21327636 - 02/25/15 11:38 AM (9 years, 10 months ago)


Here she is un-assembled. The frame was meant to catch the gasket on the front of the filter as well as sandwich the filter and prefilter between itself and the four mounting braces.

The filter is one of 2 broken filters I received from the company ordered from. A 3rd (yes third) RMA filter will be here soon (lol if its damaged too). I may actually use the 2nd broken filter it only has a few small tears in 2 corners.

This bitch is f'n awkward (25x25x30). I have no idea where to put it...and its a pain to move around. The fan is a 1/2 hp furnace fan I scooped off of craigslist.

Finally the test. As you can see in the previous pic the frame isn't even fully attached, which is letting a good amount of air out, the filter has several large rips in it, the fan is just sitting in the hole, not sealed, yet its not leaking much air as its a pretty tight fit I guess...but my point is that even with all the pressure loss, from several inches away (about a ft actually) the flow was high enough to bend the flame of my butane torch (I didn't have a lighter handy).

Cost?
40 dollars worth of 3/4inch particle board
9 dollars worth of screws and nails
123 for the 24x24x6 99.999 hepa
46 for the electrostatic washable prefilter
40 bucks for the furnace fan (craigslist)

Any advice? Any questions? I have no idea how far away I can actually be from the filter face for effective laminar flow, so if someone could advise on that i'd appreciate it.


--------------------
:three:

Edited by camplo (02/25/15 11:58 AM)

Extras: Filter Print Post Top
Offlinecamplo
Freedom!


Registered: 02/10/08
Posts: 1,675
Last seen: 3 years, 3 months
Re: Flow Hood help [Re: camplo]
    #21327661 - 02/25/15 11:47 AM (9 years, 10 months ago)

lol I just tried the lighter test. I can't even keep it lit at 2ft away so I think I have plenty of flow! Good think there are speed settings on this thing!


--------------------
:three:

Extras: Filter Print Post Top
InvisibleVal
Were just Marbles in a Cave...

Registered: 01/31/15
Posts: 120
Re: Flow Hood help [Re: camplo]
    #21329380 - 02/25/15 05:13 PM (9 years, 10 months ago)

I know when I built mine i used Silicone to seal all crevices....also there was a airflow spec that I followed to size my fan.

I also Built a pre filter box to go over fan with a good filter found at big box home stores.

Edited by Val (02/25/15 05:16 PM)

Extras: Filter Print Post Top
Offlinecamplo
Freedom!


Registered: 02/10/08
Posts: 1,675
Last seen: 3 years, 3 months
Re: Flow Hood help [Re: Val]
    #21337111 - 02/27/15 07:49 AM (9 years, 10 months ago)

I'd like to have a prefilter before the fan but the box is gigantic as it is. When I was a little more well studied on the subject (while gathering parts) I came to the conclusion that this fan would be adequate. I did not expect it to be over kill, but it does have 4 different speeds to so no worries there. If I'm correct my final airflow should be about 200 cfm, and will lean a light flame approx 45 degrees....from what distance I don't know. I also don't know the size of the effective work area and was hoping someone would clue me in.


--------------------
:three:

Extras: Filter Print Post Top
Offlinemushpunx
Fungus Punk
 User Gallery


Registered: 04/20/14
Posts: 13,394
Last seen: 2 months, 8 days
Trusted Cultivator
Re: Flow Hood help [Re: camplo]
    #21337349 - 02/27/15 09:14 AM (9 years, 10 months ago)

I try to work as close to the filter as possible as thats the cleanest. When pouring plates, Agar work, grain to grain have everything right up against the filter (doesnt have to touch it obviously.)

I mean you really dont want to have anything betweem your work and the hepa anyways. I dont actually know how far away you can work with it. I work within six inches of the filter :shrug:


Nice build man! Nice prices on everything too looks like you got a deal!

So you matched the filter to the blower yea? What was the specs on the blower @ free air and then at like .8 or 1sp

If you matched them up correctly it should be solid.


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

Amateur Mycologists United
AMU Q&A

Extras: Filter Print Post Top
InvisibleMr. Alien
I will abduct andprobe your anus
 User Gallery


Registered: 01/14/14
Posts: 6,290
Loc: Star Wars Galaxy
Re: Flow Hood help [Re: mushpunx]
    #21337414 - 02/27/15 09:28 AM (9 years, 10 months ago)

Add a plexi glass tunnel. It will give you a much cleaner space to work.


Extras: Filter Print Post Top
Offlinemushpunx
Fungus Punk
 User Gallery


Registered: 04/20/14
Posts: 13,394
Last seen: 2 months, 8 days
Trusted Cultivator
Re: Flow Hood help [Re: Mr. Alien]
    #21337714 - 02/27/15 10:40 AM (9 years, 10 months ago)

Love your work space mr alien !


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

Amateur Mycologists United
AMU Q&A

Extras: Filter Print Post Top
InvisibleMr. Alien
I will abduct andprobe your anus
 User Gallery


Registered: 01/14/14
Posts: 6,290
Loc: Star Wars Galaxy
Re: Flow Hood help [Re: mushpunx]
    #21338087 - 02/27/15 12:06 PM (9 years, 10 months ago)

Thank you! Hope it give some ideas to others.

Extras: Filter Print Post Top
Offlinecamplo
Freedom!


Registered: 02/10/08
Posts: 1,675
Last seen: 3 years, 3 months
Re: Flow Hood help [Re: Mr. Alien]
    #21338551 - 02/27/15 01:47 PM (9 years, 10 months ago)

Thanks for the info guys.


--------------------
:three:

Extras: Filter Print Post Top
Offlinecamplo
Freedom!


Registered: 02/10/08
Posts: 1,675
Last seen: 3 years, 3 months
Re: Flow Hood help [Re: camplo]
    #21352049 - 03/02/15 01:27 PM (9 years, 10 months ago)

To any new flow hood builders, you can test your work space for laminar flow with a lighter are better yet a butane torch. Take the lighter/torch and move it around in front of the flowhood while its in operation, the flame will bend but not twitch wildly when in the flow thats laminar. When its in a turbulent flow it will show the character of the turbulence by the effect on the flame. One of the reasons I opted to build with a 24x24 filter is because I suspected that flow around the edges of the filter would be turbulent no matter what because of the lip of the cage of the filter catching air. Tested with my torch, my theory is correct. Within the 24x24 area if have an area of about 17x17 that has perfectly laminar flow.

If I remember correctly most people will advise to work as close as possible to the filter as well, in the middle of the filter. Gl.


--------------------
:three:

Extras: Filter Print Post Top
InvisibleMr. Alien
I will abduct andprobe your anus
 User Gallery


Registered: 01/14/14
Posts: 6,290
Loc: Star Wars Galaxy
Re: Flow Hood help [Re: camplo]
    #21352065 - 03/02/15 01:32 PM (9 years, 10 months ago)

The flame should bend 45º with a BIC lighter. A butane torch is not the same IMO, the flame goes out much stronger with a torch.

Extras: Filter Print Post Top
Offlinecamplo
Freedom!


Registered: 02/10/08
Posts: 1,675
Last seen: 3 years, 3 months
Re: Flow Hood help [Re: Mr. Alien]
    #21352956 - 03/02/15 05:37 PM (9 years, 10 months ago)

That is if you are care to have a 200cfm or below. You can still get laminar flow above 200cfm

But A butane torch flame can have a stronger than a lighter for sure. Thus it won't get blown out as soon as a lighter would in terms of CFM, non the less it can still be used to test for laminar flow.

As well you must consider that you can adjust the flow of a butane torch to be weaker than a bic lighter if you chose too.

Quote:

Matching a blower to the filter
According to Stamets (Paul Stamets and J.S.Chilton: The Mushroom Cultivator p. 347 ff) the air speed of the air flowing from the filter surface should be (at least) 100 feet per minute(fpm).(around 30 meter per minute or 0.5 meter per second).




I believe its 200cfm that gets you there and the bic lighter test will show a 45 degree angle but you can go over that airspeed. It would be silly to have airspeed so high that you can't keep your flame source lit I must say. If you get too high I believe that will not have laminar flow as well as if you have too little, either way the flame will tell you how the air is behaving. I am not certain how high is too high but I don't think anyone of us can provide enough power to hit that number anyway...

If you notice in the pic above the flame is bent, it is not dancing about wildly or at all for the matter, which would signify turbulence...it is in laminar flow.

Edited by camplo (03/02/15 06:14 PM)

Extras: Filter Print Post Top
Offlinemushpunx
Fungus Punk
 User Gallery


Registered: 04/20/14
Posts: 13,394
Last seen: 2 months, 8 days
Trusted Cultivator
Re: Flow Hood help [Re: camplo]
    #21353172 - 03/02/15 06:31 PM (9 years, 10 months ago)

Hey man you see the bent pins you have in the filter? You can take a thin nail and just pull up with it and it rounds them back out

I bump mine all the time I straighten them out


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

Amateur Mycologists United
AMU Q&A

Extras: Filter Print Post Top
Offlinecamplo
Freedom!


Registered: 02/10/08
Posts: 1,675
Last seen: 3 years, 3 months
Re: Flow Hood help [Re: mushpunx]
    #21353320 - 03/02/15 07:00 PM (9 years, 10 months ago)

That filter has holes in it, it was destroyed in shipping, so was the 1st RMA, and the the 2nd RMA, finally, came in mint condition.


Its weird to me that the 2nd filter they sent was of better construction/build than the first, and the 3rd filter they sent was of way better construction than the first 2. The 3rd filter looks like its mini pleated. I'll post a pic when I get home.

Thanks for the advice though, my filter (the 1st and 2nd rma) has a metal grate on the front to supposedly stop that from happening


--------------------
:three:

Edited by camplo (03/02/15 07:02 PM)

Extras: Filter Print Post Top
InvisibleMr. Alien
I will abduct andprobe your anus
 User Gallery


Registered: 01/14/14
Posts: 6,290
Loc: Star Wars Galaxy
Re: Flow Hood help [Re: camplo]
    #21353330 - 03/02/15 07:02 PM (9 years, 10 months ago)

Quote:

camplo said:







I imagine the flame it's adjusted to the minimum? I would try it with a BIC lighter though :shrug: perhaps it will bend more than 45º

Extras: Filter Print Post Top
Offlinecamplo
Freedom!


Registered: 02/10/08
Posts: 1,675
Last seen: 3 years, 3 months
Re: Flow Hood help [Re: Mr. Alien]
    #21353343 - 03/02/15 07:04 PM (9 years, 10 months ago)

It isnt adjusted to minimum, it would just go out. A bic lighter, when tested, is at the point where it almost doesn't blow out....but does... but like I said, being able to keep a bic lighter lit, isn't a necessity for laminar flow more like a rule of thumb for mush culture. I'm getting a little over 200cfm for sure but not an crazy amount over.


--------------------
:three:

Edited by camplo (03/02/15 07:07 PM)

Extras: Filter Print Post Top
InvisibleMr. Alien
I will abduct andprobe your anus
 User Gallery


Registered: 01/14/14
Posts: 6,290
Loc: Star Wars Galaxy
Re: Flow Hood help [Re: camplo]
    #21353352 - 03/02/15 07:06 PM (9 years, 10 months ago)

Quote:

camplo said:
It isnt adjusted to minimum, it would just go out. A bic lighter, when tested, is at the point where it almost doesn't blow out....but does... but like I said, being to keep a bic lighter lit, isn't a necessity for laminar flow. I'm getting a little over 200cfm for sure but not an crazy amount over.




:thumbup::ooo:

Extras: Filter Print Post Top
Offlinemushpunx
Fungus Punk
 User Gallery


Registered: 04/20/14
Posts: 13,394
Last seen: 2 months, 8 days
Trusted Cultivator
Re: Flow Hood help [Re: Mr. Alien]
    #21353797 - 03/02/15 08:35 PM (9 years, 10 months ago)

Oh man I wish I had a grate in front of mine just the slightest bump bends all the pins!

My hood blows my bic lighter closer to 90 degrees, maybe less. Almost amywhere around the filter, it blows pretty even


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

Amateur Mycologists United
AMU Q&A

Extras: Filter Print Post Top
Offlinecamplo
Freedom!


Registered: 02/10/08
Posts: 1,675
Last seen: 3 years, 3 months
Re: Flow Hood help [Re: mushpunx]
    #21361114 - 03/04/15 12:53 PM (9 years, 10 months ago)

Mine is blows slightly stronger than that, just barely enough to blow out the flame, sometimes the flame will stay lit for a second and then go out.


--------------------
:three:

Extras: Filter Print Post Top
Offlineblojo02184
Big Red
Male User Gallery


Registered: 05/15/13
Posts: 3,527
Loc: Maine
Last seen: 6 months, 22 days
Re: Flow Hood help [Re: camplo]
    #21361177 - 03/04/15 01:06 PM (9 years, 10 months ago)

Just an fyi bud, you hold a bic like your lighting a cigarette so the heat and flame travel upwards. The laminar flow will then bend the flame.

It doesn't work to the side like that because heat rises.

Extras: Filter Print Post Top
Jump to top Pages: 1 | 2 | Next >  [ show all ]

Shop: PhytoExtractum Kratom Powder for Sale   Kraken Kratom Red Vein Kratom   Bridgetown Botanicals CBD Concentrates   OlympusMyco.com No Unicorns Here—Just Quality Bags That Work   Left Coast Kratom Buy Kratom Extract   North Spore Injection Grain Bag   Myyco.com Isolated Cubensis Liquid Culture For Sale


Similar ThreadsPosterViewsRepliesLast post
* Flow Hood
( 1 2 all )
SpinyPine44 3,036 32 08/07/08 11:08 PM
by SpinyPine44
* Relatively Poor Mans Laminar Flow hood stinkbuttdog 14,658 13 08/08/07 06:52 AM
by RogerRabbit
* Homemade "Laminar" flow hood
( 1 2 all )
The shroomy 1 35,644 24 08/15/08 04:58 AM
by Ogre812
* Laminar flow hood, self-made or new purchase?
( 1 2 all )
MichaelH 20,179 20 02/20/14 11:27 PM
by MyloPsybe
* An laminar flow hood/glove box question. Brainiac 2,917 5 09/27/06 09:00 PM
by Brainiac
* New Flow Hood shroober 1,491 15 05/15/08 08:16 AM
by Anno
* Laminar Flow Hood Questions haxjester 2,495 6 02/16/08 05:26 PM
by FooMan
* Will this Laminar Flow Hood work for mushroom cultivation?? jenns_hot 1,575 5 12/18/07 10:37 AM
by RogerRabbit

Extra information
You cannot start new topics / You cannot reply to topics
HTML is disabled / BBCode is enabled
Moderator: Shroomism, george castanza, RogerRabbit, veggie, mushboy, fahtster, LogicaL Chaos, 13shrooms, hamloaf, cronicr, Stipe-n Cap, Pastywhyte, bodhisatta, Tormato, Land Trout, A.k.a
1,458 topic views. 28 members, 140 guests and 88 web crawlers are browsing this forum.
[ Show Images Only | Sort by Score | Print Topic ]
Search this thread:

Copyright 1997-2025 Mind Media. Some rights reserved.

Generated in 0.02 seconds spending 0.004 seconds on 14 queries.