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Old 02-27-2007, 12:35 PM
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Paint booth setup

I have scoured this forum for paint booth setup and I have a few questions. To start with I'll describe what I plan so far. I am not really decided on how my paint booth is going to be built. I could put up a drywall partition and have half the garage for car work and half to serve as a paint booth, but I think for the initial painting I am going to use throw away plastic tarps. As far as air flow I want about 1 air exchange per two minutes. To meet this, I have purchased two old hvac fans for 25$ a piece. They output about 800 cfm (2-ton) with no static pressure and have a high and low speed setting. I think I am going to set these guys up in the attic and place filters up there. The air will be channeled through ducting into the paint area from overhead. The exhaust will leave through a large pvc pipe. The pipe will have holes in it laid and be laid at the side of the boot. The pvc pipe will merge into a filter box and then go out the window in my garage.

I would kind of like to go for a downdraft booth since this is the best way to paint. I was wondering if I built a wood platform with holes in it, and ran the air through that if I would get the same effect as a downdraft booth and would it be worthwhile? I am planning on buying a hobby air air supply unit. (It is the cheapest air supply unit I could find) and also buying a good air/water separator and paint gun. One thing that is missing in the setup above is the exhaust fan. Ideally you would have a slight positive air pressure in the booth, so that dust in cracks gets pushed out instead of pulled in. But also if the fan is in the fumes then you also need an explosion proof fan which are pretty expensive. So I am hoping to get away with this setup. As for lighting what do you guys recommend? Does these have to be explosion proof? I would like to use full spectrum florecent bulbs but I am not sure if I need fixtures.

Now I am just wondering if anything I am planning on doing is incorrect or there is something I am missing. Experienced paint guys feel free to chip in here. This is my first time setting this all up and there are a lot of factors involved.

Thanks for your input. -Mike

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Old 03-04-2007, 08:39 PM
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generally lights in a booth are explosion proof but the should be mounted on the out side with glass between the interior of the booth and the fixture. As far as being positve pressure inside the booth it is generally in vacum so all cracks should be sealed with caulk. Air flow in a downdraft arrangement is best but if you can't dig a pit have the airflow go out the side at the bottom. I've used crossflow, downdraft, and side downdraft. paint cleanliness really is just in the prep of the car and booth. Good luck and hope I helped

kris,
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Old 03-04-2007, 10:16 PM
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Quote:
Originally Posted by 10Tonhammer
generally lights in a booth are explosion proof but the should be mounted on the out side with glass between the interior of the booth and the fixture. As far as being positve pressure inside the booth it is generally in vacum so all cracks should be sealed with caulk. Air flow in a downdraft arrangement is best but if you can't dig a pit have the airflow go out the side at the bottom. I've used crossflow, downdraft, and side downdraft. paint cleanliness really is just in the prep of the car and booth. Good luck and hope I helped

kris,
Thanks for the response. I think I am going to be building a booth here soon. drywall for the walls. I am going to use tempered glass with ordinary flourecent light fixtures behind them. For downdraft, I have been studying the booths they sell and they are just as you say. I think in constructing my booth I'll put a box down the center for the exhaust air. Lay the filters down there and exhuast the air outside. Also have ramps to get the car a 1ft or so off the ground, up higher from tbe box.
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Old 03-08-2007, 12:17 AM
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I built one that could be taken apart and the wall sections stacked up, if your interesred in any of it, its on my site here.

Rob

http://www.1969supersport.com/
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