Jump to content


You Say You Want a Spray Booth, Do Ya?


  • You cannot reply to this topic
72 replies to this topic

#61 spad007

spad007

    MCM Friend

  • Members
  • PipPipPipPip
  • 139 posts
  • Location:Colorado
  • Full Name:Mike Basford

Posted 06 March 2011 - 08:08 AM

i think some people are missing the bigger picture here. although acrylic paints are waterbased, they are also a plastic base. which plastic burns. the fumes from acrylic won't likely flash but, if enough of the residue builds up, you could have a fire. the bigger picture i'm referring to is, how much other paint do we have around our booths? bottles, rattle cans, bondo, thinner, paper and plastic products. it only takes one spark, not only from a booth but, from a light or tool or what have you. i don't care what kind of booth you have, if it has a fan or light, you have the potential for a fire. if a fan is binding you will have heat. (even with explosive proof or sealed fans) my point is be careful guys and use common sense and it probably wouldn't hurt to keep a fire extinguisher around. Happy Building Guys!!!

Any Computer fans i have are Brush-less. i might be wrong but no brushes no sparks. the fans i have don't get hot.
they are double ball bearing and i use activated charcoal air filters they are replacement filters for room air cleaners.5 bucks for 2
i have some battery powered lights i will say not too hot and not really dangerous.
one must use common sense.
Blasting a flammable fog direct into or at any thing is not a good idea.
Baffle the air flow suck/blow it away from the fan, filter it. Try and be safe. But still model as best as one can .
I wish you all to have fun not blow up you house. How about a water fall booth?..Ha Ha Snicker.

#62 LOBBS

LOBBS

    MCM Ohana

  • Members
  • PipPipPipPipPipPip
  • 531 posts
  • Location:Independence, MO
  • Full Name:Kyle "LOBBS" Laubscher

Posted 06 March 2011 - 01:49 PM

If you're going to build one at home, do it right.

I'll post these instructions again on this thread to build a properly ventilated booth. It's not my write-up, it was posted years ago by Klaus Raddatz. I've built several booths using these instructions and have never had any issues of any kind. The only reason I've built several was to improve materials and/or change the design to fit my personal preferences.

See attached file

Attached Files


Edited by LOBBS, 06 March 2011 - 01:49 PM.


#63 Aaronw

Aaronw

    MCM Ohana

  • Members
  • PipPipPipPipPipPip
  • 2,497 posts
  • Location:North Coast of California
  • Full Name:Aaron

Posted 06 March 2011 - 02:17 PM

I have to agree ..I've been using computer fans for 7 years .ofcourse I don't go spraying lacquer thinner into the motor.I use mainly acrylics
But In my 30 years building I have never read an actual case of an airbrush booth of that type flashing/exploding.
Can someone please post a case of of an airbrush booth catching fire ? I would be interested in reading what kind of "booth" they were using.

I also think it's important to filter.
...some people mention venting directly to the atmosphere ... that's not too cool


There have been 2 or 3 posted in the last year or two, one was related to using a shopvac as the fan and it resulted in serious injuries because the cannister went boom, another was a home built booth that caught fire, less severe injuries but as I recall some eye damage, there may have been a 3rd (or 4th) but I could also be bluring them together or they may have been reposts of the same event. I don't have links to either as I didn't save them, but a search might turn up the posts.

I couldn't tell you what the specific issue is with computer fans, I just know all of the commercially available booths I looked at use a regular (not explosion proof) squirrel cage blower. I also ran it past the fire marshall I work with and he said the squirrel cage was acceptable for my needs (in other words if I blow up my garage he won't say I told you so :lol: ).

Out of curiosity what kind of CFM and cost are you looking at with those computer fans? I have a hard time imagining that they can push anything close to the recommended volume of air without buying a stack of them. If that is true they would have to be super cheap to be cost effective.

#64 spad007

spad007

    MCM Friend

  • Members
  • PipPipPipPip
  • 139 posts
  • Location:Colorado
  • Full Name:Mike Basford

Posted 06 March 2011 - 03:16 PM

There have been 2 or 3 posted in the last year or two, one was related to using a shopvac as the fan and it resulted in serious injuries because the cannister went boom, another was a home built booth that caught fire, less severe injuries but as I recall some eye damage, there may have been a 3rd (or 4th) but I could also be bluring them together or they may have been reposts of the same event. I don't have links to either as I didn't save them, but a search might turn up the posts.

I couldn't tell you what the specific issue is with computer fans, I just know all of the commercially available booths I looked at use a regular (not explosion proof) squirrel cage blower. I also ran it past the fire marshall I work with and he said the squirrel cage was acceptable for my needs (in other words if I blow up my garage he won't say I told you so :lol: ).

Out of curiosity what kind of CFM and cost are you looking at with those computer fans? I have a hard time imagining that they can push anything close to the recommended volume of air without buying a stack of them. If that is true they would have to be super cheap to be cost effective.

Fans Fans i use two 120x38mm fans side by side at over 100cfm each ( = 200 cfm plus)they are used take outs from old computers basically free. to me
you might buy new similar for 15 bucks each off the net.
i have a short run for the air and don't use the thing for more than a few minuets at a time.

#65 Harry P.

Harry P.

    MCM Ohana

  • Administrators
  • PipPipPipPipPipPip
  • 22,391 posts
  • Location:NW suburban Chicago
  • Full Name:A mere layman...

Posted 07 March 2011 - 08:11 AM

acrylic paints are not "water based" they are "acrylic based",, they are water soluble , and easily cleaned up by water prior to curing.That's the ONLY thing they have to do with ...WATER


I guess it depends on who you ask.

From About.com: Acrylics are water-based paints, which means they can be mixed with water to thin them down and you clean your brushes with water. They’re made from pigment mixed with acrylic resin and emulsion.

From Wikipedia: water serves as the vehicle for an emulsion (suspension) of acrylic polymer that is the binder in acrylic paint. ...acrylic paint is "water-based" (or sometimes "water-borne").

#66 Carmikeman

Carmikeman

    MCM Friend

  • Members
  • PipPipPipPip
  • 163 posts
  • Location:St. Francis Ark.
  • Full Name:Jim Brawner

Posted 08 March 2011 - 07:11 AM

for what it's worth. i contacted Paasche about my spraybooth yesterday and asked if it had an explosion proof fan motor. i have the Hssb-22 from Tps Global. here is their response:
If it is our HSSB-22-16 then no the fan is not Explosion proof so should only be used for water based paints. Our BBF and EBF series booths all come standard with Exp Motors and tube axial fans. They are also set up for businesses as far as meeting OSHA and NFPA standards which the HSSB models are not.



Thanks,

Brian Pettersen

Paasche Airbrush Co

4311 N Normandy Ave

Chicago, IL 60634-1395

(800) 621-1907 et 121
__________________________

i guess life IS like a box of chocolates, after all. lol

#67 Aaronw

Aaronw

    MCM Ohana

  • Members
  • PipPipPipPipPipPip
  • 2,497 posts
  • Location:North Coast of California
  • Full Name:Aaron

Posted 11 March 2011 - 05:56 PM

Fans Fans i use two 120x38mm fans side by side at over 100cfm each ( = 200 cfm plus)they are used take outs from old computers basically free. to me
you might buy new similar for 15 bucks each off the net.
i have a short run for the air and don't use the thing for more than a few minuets at a time.


That is a lot more CFM than I expected I can see why some use them.

#68 Don Wheeler

Don Wheeler

    MCM Regular

  • Members
  • PipPipPip
  • 58 posts
  • Location:Fullerton, California
  • Full Name:Don Wheeler

Posted 12 March 2011 - 04:59 PM

If you are concerned about fan type for spray booths, you should look at this page. http://www.cincinnat...n-proof-fan.htm Notice that there is no such thing as an explosion proof fan. Notice that spark/explosion resistant fans are made that way by using non-ferrous materials, not by special motor type. If you move enough air to keep vapors below the lower explosion limit, (see http://en.wikipedia....mmability_limit ) sparks will not cause an explosion. If you don't stay below this limit, then a static electric spark from unrolling a piece of Scotch tape or a spark from throwing a light switch could set off an explosion. Always have the fan running before you begin to spray.

Don

#69 GTMust

GTMust

    MCM Ohana

  • Members
  • PipPipPipPipPipPip
  • 1,018 posts
  • Location:Belleville, Ontario, Canada
  • Full Name:Tony Durham

Posted 17 March 2011 - 12:20 PM

I've had so much fun (and learned a lot) reading and following this thread, that I'll be sad to see it end! In some ways I have a much clearer picture of what I should do to be perfectly safe... or do I? Reading between everyone's lines, I doubt there is such a thing as perfectly safe... but maybe that's life anyway. One thing's for sure, I won't be using a vacuum cleaner and I do take the cautions about electrical sparks and spray fumes seriously, as everyone should!

But one thing still eludes me. I have no basement in my house and my windows all have fixed screens on the outside..... that will be a great concern to my wife if they get even slightly discolored by trying to escape the paint fumes(?) through them and I'm not about to start cutting 4" diameter holes though my walls for an extra dryer vent.

Oh well.... I guess I'm going to brave these Canadian winters still, and take my spray cans and models ouside and blow the fumes into my neighbour's yard. God help the environment!

(I know this is a serious subject, so please don't think I'm being flippant. Thanks for getting it started, Virgil!)

#70 pharr7226

pharr7226

    MCM Ohana

  • Members
  • PipPipPipPipPipPip
  • 950 posts
  • Location:Atlanta, GA
  • Full Name:Rick

Posted 17 March 2011 - 01:04 PM

But one thing still eludes me. I have no basement in my house and my windows all have fixed screens on the outside..... that will be a great concern to my wife if they get even slightly discolored by trying to escape the paint fumes(?) through them and I'm not about to start cutting 4" diameter holes though my walls for an extra dryer vent.


Just hit the screen with some flat black paint.

#71 ctowe86

ctowe86

    Looker

  • Members
  • Pip
  • 2 posts
  • Location:chico
  • Full Name:Corey towe

Posted 20 March 2014 - 06:12 PM

I loved this made me laugh Sometimes you gotta use what you have

#72 bigbluesd

bigbluesd

    MCM Friend

  • Members
  • PipPipPipPip
  • 112 posts
  • Location:Georgia
  • Full Name:Brandon Boyd

Posted 24 March 2014 - 05:54 AM

I didn't read every post on this thread, so somebody may have beat me to it, but here is a contribution: 

 

http://www.amazon.co...t?ie=UTF8&psc=1

 

Ignition protected, 235 CFM and only $30 each. My custom built booth runs two of them powered by a PC power supply that is housed underneath the booth. Not exactly quiet but I have no concerns about melting my skin off if I get too heavy with the fumes.



#73 dbiggied

dbiggied

    MCM Member

  • Members
  • PipPip
  • 12 posts
  • Location:North Carolina
  • Full Name:Doug Wilson

Posted 28 March 2014 - 04:37 AM

I am going to take the middle road here.  You CAN do it on a budget, BUT PLEASE DO IT RIGHT.  Even if you think you are safe from explosion, you MUST maintain a minimum air flow to properly exhaust the fumes or you will end up with lacquer in your lungs.  Multiply the width and height of your booth's front opening, and then multiply that by 100.  That is the minimum cfm your fan should have.  for example, if your booth opening is 2ft by 2ft, then 2x2x100 = 400.  If your fan is rated for anything less than 400cfm, you are NOT moving enough air.

 

Another thing I don't think I saw mentioned here...you must have a source of fresh air.  The air that your fan blows out the window has to come from somewhere.  If you have gas/oil/wood fired heat, that air can get pulled from your heating system...hello carbon monoxide!  Even if you have electric heat, if your house is properly sealed up, there's no where for the replacement air to come from, and your cfm will drop.

 

BUT...you can have your cake and eat it too...you just have to put in some effort...

 

For my booth, I have an insulated board mounted permanently in my window with two air doors actuated by push rods...one for exhaust air and one for intake air.  My blower is mounted directly to the board blowing straight out of the exhaust door.   My modeling desk has a hole cut in the top surface lined up over the blower and sealed to it with some rings of wood and some weatherstripping.  All I have to do to paint is remove the piece that covers the hole in my desk, drop in an air filter, stand up a temporary three sided shield + top on my desk, pop open both air doors and turn on the blower.

 

 

I got lucky and got a 400 cfm squirrel cage blower at a thrift store for $8...check craig's list, yard sales, classifieds, ebay...I can almost guarantee you'll find a used one for $25 or less if you look hard enough.

 

The push rods for the air doors are music wire run through nylon tubes...hobby shop...$7 total

 

Everything else (mounting board, air doors, insulation, hardware) all came from scrap wood, materials, and various bits of hardware I scrounged up from my and my dad's house

 

 

My point is that you CAN build a booth that will be safe and healthy WITHOUT spending a ton of money.  You just have to have the will to make it work.


Edited by dbiggied, 28 March 2014 - 05:04 AM.