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OfflineDreamchild
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Laminar Flowhood Filter
    #19004478 - 10/20/13 03:41 PM (10 years, 3 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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OfflineRogerRabbitM
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Re: Laminar Flowhood Filter [Re: Dreamchild]
    #19005513 - 10/20/13 07:32 PM (10 years, 3 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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OfflineDreamchild
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Re: Laminar Flowhood Filter [Re: RogerRabbit]
    #19005902 - 10/20/13 08:55 PM (10 years, 3 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

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OfflineRogerRabbitM
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Re: Laminar Flowhood Filter [Re: Dreamchild]
    #19005952 - 10/20/13 09:05 PM (10 years, 3 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


--------------------
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OfflineDreamchild
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Re: Laminar Flowhood Filter [Re: RogerRabbit]
    #19006016 - 10/20/13 09:20 PM (10 years, 3 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

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Offlinedrake89
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Re: Laminar Flowhood Filter [Re: Dreamchild]
    #19008935 - 10/21/13 02:59 PM (10 years, 3 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, 3 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, 3 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, 3 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


--------------------
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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, 3 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, 3 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, 3 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

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Offlinedrake89
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Re: Laminar Flowhood Filter [Re: Dreamchild]
    #19015574 - 10/22/13 07:29 PM (10 years, 3 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.


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OfflineDreamchild
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Re: Laminar Flowhood Filter [Re: drake89]
    #19015927 - 10/22/13 08:21 PM (10 years, 3 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, 3 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, 3 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, 3 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, 3 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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Invisiblelipa

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Re: Laminar Flowhood Filter [Re: bakenast]
    #19053887 - 10/29/13 07:49 PM (10 years, 3 months ago)

Quote:

bakenast said:
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..




You know I have never found and in-line duct "FAN" that was said to be rated for building static pressure in a plenum like a Dayton "Blower". I bet they don't last very long used for this purpose.

Go with a blower. You can find them all over the place in used air handlers.


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Re: Laminar Flowhood Filter [Re: lipa]
    #19054027 - 10/29/13 08:07 PM (10 years, 3 months ago)

The Dayton blower I found on Ebay I feel was a reasonable price especially with the free shipping. Through Ebay, with the free shipping it should be saving me a good probably $50.

I paid $101.14 for a 24x12x6" 99.99% HEPA with free shipping, then found the Dayton Blower for $154. So if that's the correct blower I feel like I did pretty well. I wanted to keep it around $300 w/o shipping costs and it ended up under that so I'm happy :thumbup:


--------------------
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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]
    #19054048 - 10/29/13 08:11 PM (10 years, 3 months ago)

I picked up a motor speed controller at a hydro shop the other day for $35 and it controls the flowhood fine.  I don't need it for the flowhood, but checked it anyway.  Some motors are not compatible with speed controllers.

You can probably get a blower free or nearly so at a local heat and air shop.  Most have a boneyard out back with old furnaces they've removed when customers purchase new ones. Otherwise, that's not a bad price if you don't get screwed.
RR


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OfflineDreamchild
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Re: Laminar Flowhood Filter [Re: RogerRabbit]
    #19054434 - 10/29/13 09:39 PM (10 years, 3 months ago)

That's good to know! Hopefully I won't need one though.

The seller has a good rep and has bought or sold I think about 50,000 items so hopefully if I go that route everything goes smoothly. If I can find the time soon I'll definitely check that out cause the money it would save would be great. After I made a list of everything as far as agar, petri dish's, scalpel, alcohol lamp, etc... It starts to add up pretty quick and I'd like to have some extra supplies around just incase I mess anything up.


--------------------
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: lipa]
    #19055061 - 10/29/13 11:37 PM (10 years, 3 months ago)






You know I have never found and in-line duct "FAN" that was said to be rated for building static pressure in a plenum like a Dayton "Blower". I bet they don't last very long used for this purpose.

Go with a blower. You can find them all over the place in used air handlers.




ya me neither but they were close enough at rating and work perferct, for a couple years now,, but i dont use it daily. it just saved me 100$ if i remember correctly


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OfflineDreamchild
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Re: Laminar Flowhood Filter [Re: bakenast]
    #19351526 - 12/31/13 03:17 PM (10 years, 30 days ago)

I just wanted to update everyone with my flowhood situation. I originally ordered my filter from this site http://www.filtera-b2b.com/businessfilters/hepa.htm and had nothing but problems. I saw many different threads of people recommending them so I went ahead and tried them out. The filter was shipped a week later than I was quoted and there was no communication. I had to keep calling them to see the status and they just kept trying to stall me and giving me false information.

Once it shipped I received it in two days and it was poorly packaged and badly damaged. It wasn't even in a box, it was wrapped in cardboard and taped. All the filter medium was ripped and the aluminum separators were bent. After I emailed them pictures of the filter they said it is very typical damage.
It took three and a half weeks to get a refund. I called after two weeks and had to remind them about refunding me my money. There costumer service is horrible.

I then ordered a filter from Fungi Perfecti and they were happy to answer all my questions and send me a filter. I paid $80 more for the filter from Fungi Perfecti but it's well worth it considering the service and how professional they were.

Sorry for the rant, but how poorly I was treated and how bad my experience was with http://www.filtera-b2b.com/businessfilters/hepa.htm I just wanted to share my experience. I know people have used that site many times before without problems but that was my experience. I would not recommend them to anyone unless you want to risk a 6 week wait with no communication on their part for a more than likely chance of a filter to arrive with "very typical damage."


--------------------
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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Offlinefractaldill
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Re: Laminar Flowhood Filter [Re: Dreamchild]
    #19356450 - 01/01/14 10:32 PM (10 years, 29 days ago)

If you get the 24x12 filter, maybe i could save you some money and link you to this blower
http://www.ebay.com/itm/DAYTON-PSC-Blower-2-Speed-115v-/181288826070?pt=LH_DefaultDomain_0&hash=item2a35a7f4d6

One of these I actually had in my house but decided to back out of the design and return it :laugh: maybe youll get that one. (I never opened the box)


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InvisibleGanzig
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Re: Laminar Flowhood Filter [Re: fractaldill]
    #19357749 - 01/02/14 09:57 AM (10 years, 28 days ago)

Why did you back out of the design?


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Offlinefractaldill
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Re: Laminar Flowhood Filter [Re: Ganzig]
    #19358382 - 01/02/14 12:57 PM (10 years, 28 days ago)

Decided I was going to want to work with bags and get a 18x24.


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OfflineNoobiesnack
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Re: Laminar Flowhood Filter [Re: Dreamchild]
    #19569274 - 02/15/14 07:46 AM (9 years, 11 months ago)

How is the flow hood coming?

http://www.fungi.com/product-detail/product/24-x-24-x-58-micron-filter.html
Will this filter work?  I'm assumping (i hope) that a 24x24 would be big enough to work with bags, jars, petris, or whatever.  Any idea what type of blower i would need for this? please help

Which filter did you get from fungi perfecti and how do you determine which blower to use with it?


Once i get these two things I just need a pre-filter and wood and make the box?

I'm looking for a recent flow hood build I can mimic because I would like to assemble one of these asap.


Edited by Noobiesnack (02/15/14 07:53 AM)


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OfflineDreamchild
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Re: Laminar Flowhood Filter [Re: Noobiesnack]
    #19570585 - 02/15/14 04:05 PM (9 years, 11 months ago)

It's been finished for a while now. I didn't do a write up on it though. I've used it quite a bit for a agar and grain with no contams yet! Love having it over using a SAB lol

I don't do bags when I grow but from what I've read 24x24 is good for bags cause the height. When I got my filter from them I asked which blower to use with it and they gave me an item #. If you go to there site and look at the blowers it should say in the description which blower works with what size filter.

You can use a really good furnace filter or a car air filter. On my flowhood I'm using a car air filter I had laying around.

As for wood 3/4" hardwood plywood is ideal. I didn't ever find why but I assume cause it's strength and it's less porous. I've seen pics of some members builds and it looked like they used 1/2" wood though.


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


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* would this work as a flowhood? MadadaM 1,899 19 11/14/03 01:39 PM
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