Home | Community | Message Board
You are not signed in.
Sign In New Account
Forum Index Search Posts Trusted Vendors Highlights Galleries FAQ User List Chat Store Random Growery

MagicBag Grow Bags
This site includes paid links. Please support our sponsors.

Mushrooms, Mycology and Psychedelics > Mushroom Cultivation
Threaded Mode Threaded  Previous topic Previous  View all topics Index  Next topic Next 

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: Original Sensible Seeds Bulk Cannabis Seeds   MagicBag.co All-In-One Bags That Don't Suck   Unfolding Nature Unfolding Nature: Being in the Implicate Order   North Spore Bulk Substrate   Mushroom-Hut Grow Bags

Jump to first unread post Pages: | 1 | 2 | 3 |  [ show all ]
Some of these posts are very old and might contain outdated information. You may wish to search for newer posts instead.
Re: HEPA filter selection [Re: Marty Mycfly]
    #23445012 -

So a 12" thick filter would work fine, it's just bulky and would require a 12" inch "box' behind it and the Dayton blower?

I'm confused because the blower is unrated @ 1.00 SP and 1.2 according to the spec sheet on zoro

Edited by joshxjosh (07/15/16 07:32 PM)

Extras: Filter Print Post Top
Re: HEPA filter selection [Re: joshxjosh]
    #23445056 -

With 12" filters and fans it's all open for debate, they are not true laminar flow but work fine, really you can just hook up any old fan to HEPA filter and have sterile air pumping out.
But If you have not bought your filter yet, keep looking for a 6" one, especially if your worried about getting all of the specs perfect.


--------------------
Mycfly's King Oysters                                       

Mycfly's Reishi    

                                                 

Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Marty Mycfly]
    #23445064 -

I'm still looking for a 6 inch, thanks and I'm finding some similar Dayton blowers on eBay for pretty cheap which also have similar ratings, but none rated @ 1" SP. if it works fine for you I don't see why it wont work for me!

Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Marty Mycfly]
    #23445542 -

Marty Mycfly said:
I wassup the ng to buy one from them a while ago, so I called up to order it over phone and decided not to because the shipping was outrageous, I dont remember what it was but it was enough to say fuck that!



They ship freight tho. Seriously if you just bump the face of your filter it crushes the metal pins... they crumple up like foil and you can put holes in the filter material.
So you want it to come unscathed... those damaged parts will render those places on the filter not qorkable.

Earth's Tongue.... now those guys charge high shipping!! The filters are very low prices but the shipping (from the manufacturer) costs just as much!!

Keep in mind if you build your hood well it will last many, many years


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

Amateur Mycologists United
AMU Q&A

Extras: Filter Print Post Top
Re: HEPA filter selection [Re: mushpunx]
    #23445551 -

I may just have to bite the bullet and purchase a filter on from FP, unless someone is wanting to sell theirs? If anyone has purchased a filter from FP could you let me know how much they charged for shipping?

Extras: Filter Print Post Top
Re: HEPA filter selection [Re: mushpunx]
    #23445557 -

mushpunx said:
My filter was around 150-160 at the time I bought it, its about 170 now

It came sealed up new at the time with flat boards on both sides and banded with plastic shipping bands

I don't think that's all that unreasonable is it?

My Dayton blower I got new in box off Ebay for 80$ and free shipping



Well, the filter I bought was like 90$ on ebay. NOS. The only reason why I paid even more than you is because of shipping to the EU. Shipping cost me as much as the filter+ import tax. Pretty brutal. So yeah, I'd say you over paid.


--------------------
:mushroom2: My favourite agar containers and how to use them. :mushroom2:


Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Marty Mycfly]
    #23445571 -

Marty Mycfly said:
they are not true laminar flow but work fine,


Also untrue.

There is laminar flow and then there is turbulent flow, there is no in-between. Please stop saying stuff you don't know about. A 12" filter is capable of laminar flow as much as a 6" one, they just didn't know it in the past.

As OP said, the only setback with a 12" is it's bulk and the plenum required for it.

The folks I helped with a 12" hepa build both have perfect laminar flow with not even half an inch of static pressure. I worked it out for one guy and it was 0.3" w.g s.p with the prefilter included. Doesn't matter how sterile the air is, if the flow is turbulent, it will just blow contams from the outside of the jar to it's inside and it will not work. If it works, it's laminar.


--------------------
:mushroom2: My favourite agar containers and how to use them. :mushroom2:


Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Supalemonhaze]
    #23445729 -

:whathesaid:

That was my understanding of 12" deep filters. You need to use at *least* (I would go a lot bigger) plenum which adds a good bit of bulk to the hood, plus the added weight of the thicker filter

But other than that they work for flow hoods


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

Amateur Mycologists United
AMU Q&A

Extras: Filter Print Post Top
Re: HEPA filter selection [Re: mushpunx]
    #23446942 -

Supalemonhaze said:
Marty Mycfly said:
they are not true laminar flow but work fine,


Also untrue.

There is laminar flow and then there is turbulent flow, there is no in-between. Please stop saying stuff you don't know about. A 12" filter is capable of laminar flow as much as a 6" one, they just didn't know it in the past.

As OP said, the only setback with a 12" is it's bulk and the plenum required for it.

The folks I helped with a 12" hepa build both have perfect laminar flow with not even half an inch of static pressure. I worked it out for one guy and it was 0.3" w.g s.p with the prefilter included. Doesn't matter how sterile the air is, if the flow is turbulent, it will just blow contams from the outside of the jar to it's inside and it will not work. If it works, it's laminar.


I think your just being contrary now, first you were telling him to get a different size, but now that I told him that you changed your tune. MushCult man, what a pissing contest.
I do know I have a 12" filter and it's works great, I have inoculated thousands of sawdust bags and worked hundreds of plates and master jars and bags in front of it. It's set up with that Dayton blower and it rocks, perfect 90 degree angle with a lighter. I was suggesting if the OP is super stuck on getting specs matched up like it's layed out in TMC and by RR, then get the 6" filter to make it easier.

Here is a quote from LIPA in a discussion that was going on about filter thickness down in GMM,
Quote:

lipa said:
Laminar flow is not achieved unless sufficient pressure is developed behind it causing the flow of air to exit the filter "evenly" over its face. Yes, you can do sterile work in front of a 12 inch deep filter if you are working right in front of it. I hate working directly in front of a flow hood due to the fact you can spill shit on it easily. I have mine set up correctly and I can work 2-3 feet away from the front of it and still be within the air stream. That's the difference.  Most Hepas are built to be used for laminar flow. The metal separators(or "plastic" help direct the air forward and support the pleats. This facilitates better air flow within ducting, hoods and in ceiling units. You want the air to go strait down and exit in a cleanroom not flow in random ways throughout the room. While it might work for you it is not the correct filter to use.


--------------------
Mycfly's King Oysters                                       

Mycfly's Reishi    

                                                 

Edited by Marty Mycfly (07/16/16 03:18 PM)

Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Marty Mycfly]
    #23447893 -

Contrary? How did you figure that? I'm merely correcting you on stuff you clearly know nothing about. 12" filters having more resistance, 12" filters don't achieve true laminar flow, it's all bullshit and completely inaccurate.

6" filters are made specifically for laminar flow and that's the optimal choice because you can't ever go wrong with one of those but a 12" filter is perfectly capable of laminar flow regardless of what you or others thought a decade ago. Without laminar flow, you cannot work with sterility. Even if you never touch the jar with your hands after opening, the turbulent flow alone is enough to contaminate it.

In the past, it was always thought that pressure alone will determine if you will have laminar flow or not. This is not the case as hundreds of 12" FH builds have proved. OP has since PMed me for help with this build and I worked out the s.p he would have with 100fpm. The result is barely 0.2s.p, something that according to RR will never create laminar flow. As I said before, people I have helped in the past had the exact same s.p and they have perfect laminar flow. The plenum will do a very nice job at creating even pressure at the back of the filter, that is entirely the reason why a 12" filter needs a bigger plenum. The filter itself has the same resistance over the whole filter face so even that will lean towards wanting to create laminar flow. Keep in mind that the air being blown by the blower has to make a 90degree turn, this alone is already helping at making the flow linear and parallel, the plenum and the filter will take care of the rest.

If this was something I haven't experienced, I would just shut up and say nothing but the people I have helped with these filters all have perfectly good flowhoods. Static pressure is not the only reason why we get laminar flow, it's just as easy as that. Saying inaccurate shit is not going to help anybody, stick to what you know and we're good.

The people who say that 12" filters won't create laminar flow are merely following the advice that was laid down years ago when people were not sure of what would happen. There have been hundreds of successful builds since then and so we learned. I can quote you a user who used to recommend nothing but 12" filters for FHs and although I don't agree with his choice, I understand where he is coming from. 12" filters are cheaper and the blower required will be smaller, saving money all around.


--------------------
:mushroom2: My favourite agar containers and how to use them. :mushroom2:


Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Supalemonhaze]
    #23449745 -

Supalemonhaze said:
Contrary? How did you figure that? I'm merely correcting you on stuff you clearly know nothing about. 12" filters having more resistance, 12" filters don't achieve true laminar flow, it's all bullshit and completely inaccurate.

6" filters are made specifically for laminar flow and that's the optimal choice because you can't ever go wrong with one of those but a 12" filter is perfectly capable of laminar flow regardless of what you or others thought a decade ago. Without laminar flow, you cannot work with sterility. Even if you never touch the jar with your hands after opening, the turbulent flow alone is enough to contaminate it.

In the past, it was always thought that pressure alone will determine if you will have laminar flow or not. This is not the case as hundreds of 12" FH builds have proved. OP has since PMed me for help with this build and I worked out the s.p he would have with 100fpm. The result is barely 0.2s.p, something that according to RR will never create laminar flow. As I said before, people I have helped in the past had the exact same s.p and they have perfect laminar flow. The plenum will do a very nice job at creating even pressure at the back of the filter, that is entirely the reason why a 12" filter needs a bigger plenum. The filter itself has the same resistance over the whole filter face so even that will lean towards wanting to create laminar flow. Keep in mind that the air being blown by the blower has to make a 90degree turn, this alone is already helping at making the flow linear and parallel, the plenum and the filter will take care of the rest.

If this was something I haven't experienced, I would just shut up and say nothing but the people I have helped with these filters all have perfectly good flowhoods. Static pressure is not the only reason why we get laminar flow, it's just as easy as that. Saying inaccurate shit is not going to help anybody, stick to what you know and we're good.

The people who say that 12" filters won't create laminar flow are merely following the advice that was laid down years ago when people were not sure of what would happen. There have been hundreds of successful builds since then and so we learned. I can quote you a user who used to recommend nothing but 12" filters for FHs and although I don't agree with his choice, I understand where he is coming from. 12" filters are cheaper and the blower required will be smaller, saving money all around.


Again, your just being contrary and obviously didn't read my last post.


--------------------
Mycfly's King Oysters                                       

Mycfly's Reishi    

                                                 

Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Marty Mycfly]
    #23449815 -

Dude, you have 6,000 comments in less than 8 months on this site, when in the fuck do you even have time to even use a flowhood, let alone build one?
And what exactly would a new grower like you even need a flowhoood for?
I guess you just can't let that HVAC expertise(copy pasting) go to waste.


--------------------
Mycfly's King Oysters                                       

Mycfly's Reishi    

                                                 

Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Marty Mycfly]
    #23451140 -

Oh I read your post, you're just trying to climb out of the hole you dug though.

So, since you seem to be such an expert tell me, why does a 12" filter have more resistance that a 6"? Quote me some Lipa again if you can or just straight up ask him. Also, ask him what's the difference between laminar flow and true laminar flow. Don't worry, I'll wait. He might just laugh his ass off if you actually try.

Unfortunately for you and your silly argument, there isn't a single quote in my comments. Go ahead, google them and see for yourself. Every single thing I posted, I learned through actual experience.

I see you are jealous of my post count for some wierd reason. NEWSFLASH: post count means nothing except for the willingness to learn and to teach. You have gotta learn before you can actually start teaching, that's something you still have to learn it seems like. I actually stalk these forums to be able to learn enough to correct the bullshit being spewed out in threads like this. I'm sure OP appreciates that, he wouldn't have bypassed said bullshit and PMed me if he didn't.

:melt:

So I guess we'll just wait till OP builds his hood and let him tell us if he has laminar flow, "true" or otherwise. :rofl:


--------------------
:mushroom2: My favourite agar containers and how to use them. :mushroom2:


Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Supalemonhaze]
    #23451424 -

Dude, I doubt you even have a flowhood, stop acting like you know ANYTHING really about this shit. Are you an HVAC engineer or armchair cube grower? Get a life bro, your not helping or teaching anybody out there trolling and waiting for stupid questions so you could post up your faggy emojis.
And the OP has also been messaging me, guess what I told him 12" filters rock and go for it, which is what I have said this whole fucking time dumbass. But most of all haze, I want you to know I am truly sorry, I didn't know you had rewritten the book on flowhoods in the last year or so sense RR left, If I had known that I wouldn't have said what I said.


--------------------
Mycfly's King Oysters                                       

Mycfly's Reishi    

                                                 

Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Marty Mycfly]
    #23451540 -

Don't have to be a mechanic to change a car's oil. Don't have to be a chef to cook pasta. Your arguments are empty. You built a hood and by what you've been saying here you're sure as shit not an HVAC engineer.

Marty Mycfly said:
stop acting like you know ANYTHING really about this shit.


Marty Mycfly said:
a stronger fan is needed for a 12" thick filter.


Marty Mycfly said:
With 12" filters and fans it's all open for debate, they are not true laminar flow but work fine


:thatsinteresting:

Funny, it seems like you were describing yourself in that post.


--------------------
:mushroom2: My favourite agar containers and how to use them. :mushroom2:


Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Supalemonhaze]
    #23451707 -

I just described what is talked about over and over again, about 12" filters not being able to produce a laminar flow, yet I gave my input about having a good experience with a 12" filter, you gave your input, yet you took that as an argument, why? I don't know, I don't even really believe you have a flowhood, you said you built it last year and have only been growing since what, October? What have you grown a few monotubs? Why even bother with a flowhood?


--------------------
Mycfly's King Oysters                                       

Mycfly's Reishi    

                                                 

Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Marty Mycfly]
    #23451959 -

I don't really have to explain myself to you. I don't give a F what you believe, speak about what you know.

Going around like a broken stereo or a parrot repeating everything and anything you hear is bound to get you to say something inaccurate, I merely corrected you. No need to have a :meltdown:.

As I've said multiple times and as even munxpunx agreed to, a proper functioning flowhood must have laminar flow. Having a 12" filter for your flowhood you should know pretty damn well that it's laminar. If it wasn't, you would be growing nothing but molds. That's not speculation, that a fact. Sterile air means jack shit if the flow isn't laminar.

Stop trying to win an argument you already lost in the last page for god's sake. Just admit that what you said was inaccurate, learn from your mistake and teach others. Or don't but at least STFU about it, you ain't getting any medals for making yourself look even more bad.

:hatsoff: There you have it.


--------------------
:mushroom2: My favourite agar containers and how to use them. :mushroom2:


Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Supalemonhaze]
    #23452024 -

Its true. 

The reason the flow needs to be laminar is so that any falling contams get trapped in the screen and pushed forwards perpendicular , rather than settling into your open containers.

The air has to be sterile tho of course because otherwise you'd be blowing all sorts of contams right in.

If you say, move a dirty hand between the filter and your open container, it will let contams in. But if you moved a dirty hand *over top* an open container the laminar flow would push them away and not let them settle


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

Amateur Mycologists United
AMU Q&A

Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Supalemonhaze]
    #23453040 -

That's the thing Im not really sure you are talking about what "you know". To use words commonly used around here, pictures or it didnt happen, let's see your hood and all of the other ones you have been building. I will stop here, I got a warning message about my language from pussyfart that you reported me, sorry I called your emojis f***y.


--------------------
Mycfly's King Oysters                                       

Mycfly's Reishi    

                                                 

Edited by Marty Mycfly (07/18/16 02:05 PM)

Extras: Filter Print Post Top
Re: HEPA filter selection [Re: Marty Mycfly]
    #23453076 -

both of you have given me a tremendous amount of helpful information. I will be going with the 24" x 24" x 12" filter with a 12" (at least) plenum behind it, with a ~450cfm blower at a 90degree angle to the filter.

Extras: Filter Print Post Top
Jump to top Pages: | 1 | 2 | 3 |  [ show all ]

Shop: Original Sensible Seeds Bulk Cannabis Seeds   MagicBag.co All-In-One Bags That Don't Suck   Unfolding Nature Unfolding Nature: Being in the Implicate Order   North Spore Bulk Substrate   Mushroom-Hut Grow Bags

Mushrooms, Mycology and Psychedelics > Mushroom Cultivation
Threaded Mode Threaded  Previous topic Previous  View all topics Index  Next topic Next 

Similar ThreadsPosterViewsRepliesLast post
* blower for my HEPA filter, PLEASE HELP!!! FGL 2,561 13 10/09/05 02:35 PM
by Prisoner#1
* Need a good HEPA filter... krill 3,065 17 04/01/07 01:56 PM
by flushme
* Best place to get hepa filters ryan 7,909 12 11/23/04 11:18 AM
by ryan
* How to built a HEPA filter? FreeSporePrints 2,709 15 10/06/06 12:17 PM
by FreeSporePrints
* HEPA Filters and Air Flow Phynatikus 2,004 4 08/08/04 02:17 PM
by scatmanrav
* HEPA filters acidhead1279 2,017 3 05/05/03 01:36 AM
by SixTango
* Would this work? A HEPA filter ventilation question. searcher745 1,093 1 12/03/05 03:02 PM
by Lacrossa
* Building a glovebox, need a hepa filter Rohypnol 2,696 14 08/28/03 11:12 AM
by screaminsemen

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, the_chosen_one, LogicaL Chaos, 13shrooms, hamloaf, cronicr, Stipe-n Cap, Pastywhyte, bodhisatta, Tormato, Land Trout, A.k.a
2,611 topic views. 9 members, 1,931 guests and 84 web crawlers are browsing this forum.
[ Show Images Only | Sort by Score | Print Topic ]
Search this thread:

Copyright 1997-2026 Mind Media. Some rights reserved.

Generated in 0.034 seconds spending 0.012 seconds on 18 queries.