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Safety -- Make sure you are safe!

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  #1  
Old 2007-08-18, 5:08am
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Question Vent Distance?

For those of you that use box fan set ups:
how far do you have your fan from the end of your torch
This is Da Beast it and I need to know where to place it on the bench
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  #2  
Old 2007-08-18, 5:27am
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Was not sure where to add this thread, if not hope mods will move it for me.
Question in studio section too, not getting any response.
Thanks,
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  #3  
Old 2007-08-18, 7:46am
Diane (clarus) Diane (clarus) is offline
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Marieann - is that the back of your hood? Can you post a photo of the front?

Regarding where to put the fan, it can be anywhere in the duct line. I've seen them directly above the hood to at the end where it exits the wall, as well as outside at the very end. Since you have your ceiling open, I'd put it somewhere in the attic area.

-Diane
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  #4  
Old 2007-08-18, 8:12am
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To me the picture is visually confusing... I am having a hard time seeing what you actually have.... Need some better pictures of the "beast". Preferably a side view.... If its as I suspect I am not sure it will even work...

Dale
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Last edited by Dale M.; 2007-08-18 at 10:39am.
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  #5  
Old 2007-08-18, 9:00am
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The box you have there appears to be completely enclosed or maybe that is the fan itself. ~If that is in fact your FAN enclosure......where is the hood?

Wait a second.....are you placing this on the bench? ~the horizontal slits exhaust?

hmmmm.......
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  #6  
Old 2007-08-19, 4:59am
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Dianne,
That is the front face of the box there is no hood. The fan is mounted in the attic that has been closed up. The picture with the ladder shows the access panel.
The solid 10 inch duct work is comming down out of the ceiling.
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  #7  
Old 2007-08-19, 5:20am
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Dale,
Yes the pic is visually confusing, does not photograph well. This design was posted on a thread that is gone. I was not clear in the post, it will also have side baffles.
Why won't it work?
Will add baffles on the sides.
Norskiglass,
Yes, you got it that is the horizontal slit exhaust. The fan is in the attic.
Any ideas on placement on the bench.
I was thinking about 24 in from end of small torch (Bobcat Gtt) to the front of box.
the box is 6 inches deep.
Thanks, MarieAnn
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  #8  
Old 2007-08-19, 6:19am
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Oh boy I really don't know what that thing is??? How does that work? I have always been under the impression that you use a hood over the plume of gasses to collect and eject them from your space, I can't see how this would work? Why would one choose this design over the more traditional hood?
Just wondering.....
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Old 2007-08-19, 8:35am
Diane (clarus) Diane (clarus) is offline
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I'm with Mary - I don't understand how your "beast" would work. What you need for lampworking is a 5-sided box - one side is your bench, one side is the rear wall, one side is the bottom of the hood, and sides connecting the three. The 6th side is open with your torch facing into it. Is your hood a new design that we don't know about?

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  #10  
Old 2007-08-19, 8:45am
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That is Da Beast, it is huge. After looking at several options on ventilation systems, I was very confused and looked for answers. What do I know I am a lampworker not an engineer, ha, ha.
Went to a Metal worker who designs for sereral dentist and makes " fluidized beds" for Industrial hygiensts. And fume systems for film developing too. So I posted a question and found a new overhead hood design.
http://www.artglassforum.com/forums/...ead.php?t=2733
So to make a long story short this is what I came up with.
There are box fan enclosures, Overhead designs, Hoods, Barley boxes, Exhaust Tubes, etc and why not try something different.
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  #11  
Old 2007-08-19, 8:52am
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Wow Deju Vu... Seem we have had this discussion before about fluidized beds and dental lab designs...

Hope this is back of unit..... By adding two sides and a top to form a box in front of "Da Beast" it may work.

Good luck. Let us know if it works. Have doubts on how your designer arrived at this design, hope he guarantees it will work.


Dale
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Last edited by Dale M.; 2007-08-19 at 9:18am.
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  #12  
Old 2007-08-19, 9:04am
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Oh wow!!! I think I've read about this!! It is designed to increase the "draw area" of the fan, right??? Or am I totally off base? I would try two feet behind the torch like you said and see how it works. Have you considered a top baffle as well? How big is your fan? I would love to hear how well it works!!! Please let us know!!!
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  #13  
Old 2007-08-19, 4:57pm
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Dale,
De Ja Vu you remember the links.
Are you saying that only a hood design will work for all lampworkers?
Why did you edit your comment " can get my money back" or something to that effect.
Have not seen your design posted here.
Is there a link for us dummies to look at?
And if so is it a hood design?

Last edited by beadgirl; 2007-08-20 at 1:13pm.
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  #14  
Old 2007-08-19, 6:49pm
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Bill has decided to not post his article on any website because of all the bad vibes surrounding "that" thread... In fact he has decided that he has more important things to do than get into verbal fisticuffs in a forum. Quite frankly it almost turned me away from any more forums too..... Bills article was supposed to be published in August issue of "The Annealer", so if you can procure copy of "The Annealer" its there... I had worked out deal with Bill so I could publish his copyrighted article on AGA, but now that is not to be....

The article I wrote after the "other" thread went away is here....

http://www.artglassanswers.com/forum...opic.php?t=273

Any edits I have made (recently) is probably to prevent anything inflammatory from starting up again on the forum. Or to tone down something that may not sit well with others. One more time like before, and I am probably out of here for good. As for the "guarantee" remark, I hope the design for your ventilation is good, if not I hope your guy will make it right without getting his hand deeper in your wallet.

Anyway...... We shall see....

Dale
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Last edited by Dale M.; 2007-08-19 at 6:57pm.
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  #15  
Old 2007-08-20, 1:08pm
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Great link ..... Ventilation for dummies.
I shouldn't be offended because of your comment, if this doesn't work it will he will make a hood to add to this system. Thanks for your concern.
As for my ventilation, yesterday I torched for 4 hours and had no problems.
Maybe 4 hours was not long enough of a time?
Had put up temp side baffles, before starting.
Did the smoke test first w/ wo torch running. No funny smells to me or others that checked on me, or feeling crappy.
Did not use silver or frit.

Flame moved around if I used the windows for fresh make up air (they are on my Sides) If I open the door behind me no problems.
Boy was this was hard to do that door really seals well.
Wanted to know the correct placement so we can build bench area.
Thanks eveyone for your time and patience.
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  #16  
Old 2007-08-20, 1:25pm
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I re-read the article last night. Dale, do I understand correctly that the rear baffle should reach all the way down from hood to table but it's okay if the side baffles don't come all the way down? I ask because I'll need to be able to move my table in and out from under the hood.
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  #17  
Old 2007-08-20, 3:28pm
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Baffles should come down far enough that the end at least below level of flame...
All the way to bench top would be best, bringing them down from front edge of hood and tapering to nothing at bench top is probably ok, but bringing them down straight to for a true box would be better....

Testing (smoke?) will prove what is working or not working for you ...

Dale
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  #18  
Old 2007-08-20, 4:22pm
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Smoke testing.... loose rolled paper towels.
Then cone incense placed 1 inch under torch.
Is that what I did it works when the torch is lit, and also when it is not lit.
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  #19  
Old 2007-08-20, 4:47pm
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Lenora,
The draw area on the beast is horizontal slots, have seen the one you mentioned that is in post #10 ( New overhead hood design with slots)
Have a grainger fan 1TDT4 805 Cfm fan. Sunday, placed torch tip about 16 inches from the box. Have only a temp table set up and that is all I could move it back.
Worked well for me but I am no expert. I will have to buy some stick insence and try it again. All I had was the cone kind, Lol, MarieAnn
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  #20  
Old 2007-08-21, 8:36am
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Hmmm....I never liked the idea of something that size on my bench taking up room. On the other hand if it works well and you enjoy having why not eh?

Keep us posted!

~W~
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