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OfflineDreamchild
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Laminar Flowhood Filter
    #19004478 - 10/20/13 03:41 PM (10 years, 4 months ago)

So I've been a long time lurker of this site and I've learned a lot thanks to everyone here :rockon:  Recently, I've decided to build my own laminar flowhood. I've been doing a lot of reading and I think I have finally found a filter that will suit my needs. I was looking at this filter here Micron Filter.

I've emailed them to try to obtain the data sheet so I can see what blower I'm going to need to get but I haven't received a reply yet. I saw in a post that RR said that this is the filter that he has been using for years (please correct me if I'm wrong).

So my question is, is there anyway without seeing the data sheet to buy a blower to match the filter?  I'm more than happy to hear any advice from any and all of you! RR if you see this and it is the same filter you use or have used, what blower did you use in combination with it? Also what should the plenum be? I read somewhere on here it should be minimum of 6" to 18" so I was a little confused there. Sorry for the tons of questions I just want to make sure everything is correct. Thanks in advance for the help!


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Hey, if it feels good then do it! - DBZ citizen

Check out this link to some funny stuff RR has grown shrooms on! Click to check it out!


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OfflineRogerRabbitM
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Re: Laminar Flowhood Filter [Re: Dreamchild]
    #19005513 - 10/20/13 07:32 PM (10 years, 4 months ago)

Wait until you get the data sheet to be sure.  If that's the one which comes on the series 1 flowhood, they ship it with a 1/5 HP motor/blower.
RR


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"I've never had a failed experiment.  I've only discovered 10,000 methods which do not work."
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OfflineDreamchild
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Re: Laminar Flowhood Filter [Re: RogerRabbit]
    #19005902 - 10/20/13 08:55 PM (10 years, 4 months ago)

Awesome! Thanks for the response RR it's much appreciated. I was planning on giving them a call sometime later this week if I haven't gotten the email in the next couple days.

Are there any other specific questions I should ask them? Also what is your take for the plenum? I've been searching and I keep coming up with 6" to 18". I'll continue to look around at other members builds to gather as much info as I can. Thanks again!


--------------------
Hey, if it feels good then do it! - DBZ citizen

Check out this link to some funny stuff RR has grown shrooms on! Click to check it out!


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OfflineRogerRabbitM
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Re: Laminar Flowhood Filter [Re: Dreamchild]
    #19005952 - 10/20/13 09:05 PM (10 years, 4 months ago)

Make the plenum as big as practical.  Consider 6" to be minimum.  If it's not big enough the pressure on the back side of the filter won't be even across its entire surface, thus you won't get laminar flow.
RR


--------------------
Download Let's Grow Mushrooms



semper in excretia sumus solim profundum variat

"I've never had a failed experiment.  I've only discovered 10,000 methods which do not work."
Thomas Edison


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OfflineDreamchild
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Re: Laminar Flowhood Filter [Re: RogerRabbit]
    #19006016 - 10/20/13 09:20 PM (10 years, 4 months ago)

Sounds good. Thanks again RR. If it weren't for all the contributing members on here and my friend lending me your videos I wouldn't have even gotten this far so it's pretty awesome getting advice straight from you :rockon: I can't wait to start experimenting with agar and seeing everything first hand. Woo! :laugh:

I'm planning on ordering your DVDs soon also to show some support for all the help!

I'll keep everyone updated as soon as I start ordering everything and get the build started. Thanks again for the responses!


--------------------
Hey, if it feels good then do it! - DBZ citizen

Check out this link to some funny stuff RR has grown shrooms on! Click to check it out!


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Offlinedrake89
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Re: Laminar Flowhood Filter [Re: Dreamchild]
    #19008935 - 10/21/13 02:59 PM (10 years, 4 months ago)

You can get a bigger filter for cheaper, but there is a 3 week lead time.http://www.filtera-b2b.com/businessfilters/hepa.htm


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OfflineDreamchild
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Re: Laminar Flowhood Filter [Re: drake89]
    #19009269 - 10/21/13 04:15 PM (10 years, 4 months ago)

The wait time would be fine, I'm not in a huge hurry to get it. I'll definitely check that place out! Thanks for the link drake89.

I just got off the phone with a representative for Fungi Perfecti and he was very helpful. He said for the Micron Filter this is the blower to go with Blower will go with it. I should still be getting the data sheet emailed to me shortly for the filter.

Thanks for the help and suggestions! It's going to be a little while before I start ordering everything so I'll keep you posted on what I decide to do.


--------------------
Hey, if it feels good then do it! - DBZ citizen

Check out this link to some funny stuff RR has grown shrooms on! Click to check it out!


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Offlinemonoculture
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Re: Laminar Flowhood Filter [Re: Dreamchild]
    #19011905 - 10/22/13 01:51 AM (10 years, 4 months ago)

That seems odd to me, because that filter matches the example here quite right: click

So why would the total cfm be that far off when compared to the example calculation?


Edited by monoculture (10/22/13 01:52 AM)


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OfflineRogerRabbitM
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Re: Laminar Flowhood Filter [Re: monoculture]
    #19012294 - 10/22/13 06:08 AM (10 years, 4 months ago)

That blower will give you about 150 fpm out the front of the filter, minus any losses due to leakage or wetted area drag.  Your prefilter will also slow it down a bit, so hopefully you end up in the 100 to 120 fpm range.

monoculuture, there's some inaccurate info in that link.  I tried to read it all, but had a hard time getting past Every filter has a different "resistance" when air blows through it at a certain speed, this resistance is called the "static pressure".

That is wrong.  Resistance is resistance.  Static pressure is static pressure.  Resistance causes the static pressure when the blower pressurizes the plenum.

That writeup is also incorrect in stating the prefilter develops static pressure.  It does not.  The prefilter is on the wrong side of the blower to have static pressure. The prefilter will have a bit of drag/resistance, but no static pressure will develop.
RR


--------------------
Download Let's Grow Mushrooms



semper in excretia sumus solim profundum variat

"I've never had a failed experiment.  I've only discovered 10,000 methods which do not work."
Thomas Edison


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Offlinemonoculture
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Re: Laminar Flowhood Filter [Re: RogerRabbit]
    #19013312 - 10/22/13 11:50 AM (10 years, 4 months ago)

Maybe it would be right to put a statement on top of that link, because I almost used it to find out what to buy to build my own flowhood. :wink:
It would be quite disappointing for others when it won't work after spending money and time to try build something nice.


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Offlinedrake89
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Re: Laminar Flowhood Filter [Re: monoculture]
    #19014252 - 10/22/13 03:34 PM (10 years, 4 months ago)

the quick and dirty way to find a proper new blower is to

1.  calculate the square footage of your filter and multiply by 100-200cfm.  lets say 200.
2.  assume it's about 1" or greater static pressure (w.g.?) to size the blower.  i know i'm way off base with the physics terminology.
3.  go on grainger.com, or somewhere similar where they put the CFM at various static pressure ratings.  match the cfm value calculated in step 1 at around 1" SP, that should be a suitable blower.

grainger is on the expensive side of things compared to ebay but at least you can get in the ballpark.  they push dayton motors and fans, yet i could not pull up a website for that brand.


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OfflineDreamchild
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Re: Laminar Flowhood Filter [Re: RogerRabbit]
    #19014474 - 10/22/13 04:22 PM (10 years, 4 months ago)

RR, if the fpm is still too high even with the prefilter I could use a dimmer switch to bring it down a bit, right?


--------------------
Hey, if it feels good then do it! - DBZ citizen

Check out this link to some funny stuff RR has grown shrooms on! Click to check it out!


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Offlinedrake89
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Re: Laminar Flowhood Filter [Re: Dreamchild]
    #19015574 - 10/22/13 07:29 PM (10 years, 4 months ago)

Quote:

Dreamchild said:
RR, if the fpm is still too high even with the prefilter I could use a dimmer switch to bring it down a bit, right?




nope, you need an expensive vfd controller or something specifically made for motor control.


--------------------
Fiery Fungi (like us on faeboo)


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OfflineDreamchild
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Re: Laminar Flowhood Filter [Re: drake89]
    #19015927 - 10/22/13 08:21 PM (10 years, 4 months ago)

Damn! Well, that's alright. I'm still waiting for the email with the data sheet so I can see everything for myself and get it all figured out.

drake89, I checked out the link you posted for the filters and liked the thought of having the 18x24x5-7/8. It's less money and it will be taller which would be nice.
With it being a wood frame are there any down sides to that? I'm assuming if I get that one that I would want to mask off the filter and apply some kind of sealant to the frame to protect it, right?

I think I will email them and see about a data sheet for that filter as well so I can see what blower I would need and try to see roughly what costs are going to run me for the project.

Any advice or opinions on what to do from here is much appreciated. Thanks for the help!


--------------------
Hey, if it feels good then do it! - DBZ citizen

Check out this link to some funny stuff RR has grown shrooms on! Click to check it out!


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Offlinedrake89
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Re: Laminar Flowhood Filter [Re: Dreamchild]
    #19016135 - 10/22/13 08:49 PM (10 years, 4 months ago)

i've gotten them 12x12, 24x24, and 36x48.  they are always 1" SP or WG or whatever you call it.

this one would likely be appropriate, but more than your filter.  http://www.grainger.com/Grainger/DAYTON-Blower-1XJX8?Pid=search


--------------------
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OfflineDreamchild
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Re: Laminar Flowhood Filter [Re: drake89]
    #19016455 - 10/22/13 09:42 PM (10 years, 4 months ago)

I was hoping to keep the price of the blower close to $150. Well I was really hoping to keep the filter and blower w/o shipping costs as close to $300 as possible.

I'd even be interested in the smaller 12x24x5-7/8 filter. The bigger one would be nice but not necessary for anything I'd be doing. So the smaller filter would be less and would call for a less powerful blower thus saving me a little which would be nice.


--------------------
Hey, if it feels good then do it! - DBZ citizen

Check out this link to some funny stuff RR has grown shrooms on! Click to check it out!


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OfflineNoobiesnack
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Re: Laminar Flowhood Filter [Re: Dreamchild]
    #19016994 - 10/22/13 11:27 PM (10 years, 4 months ago)

Why is building a flowhood so difficult @_@.  I want to order a filter and blower but I wouldn't have any idea where to start.  I know I want a 24x24x11.5 (in that ballpark) filter so I can get a 2x2foot flow hood...  But there's so many different ones available online at different prices.

The terminology in calculating which blower is needed is difficult to me.


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OfflineDreamchild
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Re: Laminar Flowhood Filter [Re: Noobiesnack]
    #19020740 - 10/23/13 06:00 PM (10 years, 4 months ago)

So I've settled on this size 24x12 for the filter and I'm pretty sure I'm also going with this site as well for the HEPA. Thanks to drake89 for showing me that site :thumbup:

I was checking out grainger and thought this blower would be suitable. (Going off what Fungi Perfecti said about there size filter and blower to go with it)

If I screwed up and that's not correct please do correct me. I don't have the data sheet for that filter yet so I haven't ordered anything quite yet but I am going to be ordering that filter soon. After I have the data sheet and can see for my self I'll feel more comfortable ordering the blower. Does that blower seem like it's in the ball park range of what would be needed though due to the size of the filter?

I think I may be over thinking things and making them more complicated than they are so I apologize if I'm just being confusing.
Thanks for all the help so far everyone!


--------------------
Hey, if it feels good then do it! - DBZ citizen

Check out this link to some funny stuff RR has grown shrooms on! Click to check it out!


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Offlinebakenast
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Re: Laminar Flowhood Filter [Re: Dreamchild]
    #19052991 - 10/29/13 05:12 PM (10 years, 3 months ago)

Save money over buying them dayton blowers and just get a  inline greenhouse blower,, i use a 600 cfm valueline on my 12x24 hood and its over kill, and works perfect!  and you can block part of the intake to lower fan speed through filter,  or get a c.a.p controller works great too..


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OfflineDreamchild
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Re: Laminar Flowhood Filter [Re: bakenast]
    #19053594 - 10/29/13 06:57 PM (10 years, 3 months ago)

Thanks for the advice, I'll do a search on them right now! I ordered my filter but it wont be here for a few weeks so I have some time still to decide on a blower.

I found a dayton blower on ebay for $154 with free shipping that pushes 360 cfm at .8" SP so if I have every thing correct, with the prefilter that should work. That is, if I'm right lol


--------------------
Hey, if it feels good then do it! - DBZ citizen

Check out this link to some funny stuff RR has grown shrooms on! Click to check it out!


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