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Old 12-10-2009, 05:26 PM
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Benchtop paint booth

Guys,

I'm in the process of setting up a benchtop paint booth for my garage. (Yes, I know about the hazards with this.) I have been using a home made full size paint booth for a couple of years already and it works great, but I would like to be able to paint small parts without deploying the big paint booth. For my full size paint booth I used box fans, but that is impractical for a bench top set up. The booth I'm making is 3ft x 4ft x 4ft. I'm trying to decide on the type of fans to use and was thinking of these duct fans http://www.aero-flo.com/boosterfan.html or possibly using an electric radiator fan. Does anyone know if those radiator fans have sealed motors? The type of setup for this booth will likely have the fan motors exposed to the air flow which will be a problem for the exhaust fan in particular. Also, can anyone comment on how much CFMs these fans should pull?

Thanks,
Mike

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Old 12-10-2009, 05:42 PM
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My first thought would be that the fan motors should NOT be subjected to the combustible paint vapors that will be passing through the exhaust ducts. To me, that seems like a dangerous risk. I'd be more inclined to use a centrifugal blower driven by a motor that is isolated from the airflow. Just my opinion, but just one spark could result in disaster.
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Old 12-11-2009, 07:24 AM
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I built one many years ago for painting model cars and trains. I spent the money and bought a proper fan from Grainger. Check their catalog. I think the part number is Dayton 4C447 or Dayton 1TDR3 (replacement for the 4C447).
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Old 12-11-2009, 11:49 AM
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All that is needed is for the motor to be sealed, right? If I get an inexpensive electric radiator fan wouldn't that work? I have heard about guys using so-called squirrel cage style furnace fans. Are these sufficient for keeping the fumes away from the motor? Does anyone have a recommended brand/model of one of these fans. Thanks for the suggestion about Grainger, I will check that out as well, but I looked into those types of fans when I built my full size booth and they were really expensive. Kind of defeats the purpose of trying to DIY this stuff.

Mike
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