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This is almost identical to the one i have which was sold in a hobby shop.

http://www.madisonartshop.com/spraybooths.html

There are built in exhaust fans taht vent out the back which is where I attached the hose to the window vent. The window vent looks similar to this one


expept mine was just the one side with the vent. You take out the glass and put this in its place. You can get them at any hardware store.

Thanks for all the awesome ideas, guys! I think I'll build one up myself, well at least give it a shot before I buy one. Sometimes it is a real burden being an engineer ...

Erich Reichert wrote:This is almost identical to the one i have which was sold in a hobby shop.

http://www.madisonartshop.com/spraybooths.html

There are built in exhaust fans taht vent out the back which is where I attached the hose to the window vent. The window vent looks similar to this one


expept mine was just the one side with the vent. You take out the glass and put this in its place. You can get them at any hardware store.

So that does have the fan in it. Sweet.

No the fans are in the booth itself. I put the vent in a piece of plexiglass and replaced one pane of the window with my creation. The fans in the booth are strong enough to push the air up the hose although I think i may try to work in another fan up at the window to help pull better.

If the fumes go through the fan then you will want a brushless fan. Radio Shack has a big 110V brushless unit that moves a lot of air.

Bob

bgruen wrote:If the fumes go through the fan then you will want a brushless fan. Radio Shack has a big 110V brushless unit that moves a lot of air.

Bob

....or you can go with the sealed 12 volt fans for boat cowls.
Since you mentioned brushless though Bob, Pc fans are brushless. I might have to review this all over again. I have access to plenty of PC fans. Free fans are cheaper.

They are brushless fans, simliar to the ones in computers.

Erich Reichert wrote:They are brushless fans, simliar to the ones in computers.

You referring to the ones they use for boat cowls or the ones in your setup?

The idea of using a few computer fans is intriguing ... they are 12v DC correct? Being an electrical dummy, how would I get them to work with AC? Can I just buy a small computer power supply and hook them up?

Thanks guys, this is a really interesting discussion! Once I get it all figured out in my head, I plan on building a spray booth next week.

Brian

If you use a PC power supply, you have to short pin 14 on the 20 pin supply or 16 on the 24 pin supply to another pin that goes to black. That will turn on the power of the supply. They are not designed to power up unless they are connected to a mother board.

The best way would be to order a cheep 12 volt power supply from ebay that can output an amp or so. You don't need a lot of power because the fans do not pull a lot of amps. I have a 4 fan array running off an old printer power pack that puts out a little over an amp.

This would work great for several fans:

http://cgi.ebay.com/LCD-AC-Power-Adapter-12-Volt-4-Amp-12V-4A-DC-Supply_W0QQitemZ330195136795QQihZ014QQcategoryZ51050QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

You could cut off the end and wire it straight or install the mail part and have a power cable that can be removed for easy transport.

Hook them up in parallel (not series) and put a potentiometer in line before the fans to adjust the speed of the fans.

ahhhh ... great idea. There just might be one or two of them laying around the office ... I had also though of investing in a 12v power supply for a new charger that i could also use for this.

Brian

Those fans dont' really use much power either, you could use a DC adapter plug just make sure it meets the voltage and amps needed for the fan. You know what i mean right? Those large black plugs you used to get with nintendo and radios and things? I think they're like 20 bucks at radioshack

I just pulled a 90mm NMB from a Dell and it is rated at .68A. I am assuming that is peak power. If you wanted to run 2 of those, you would need a power pack that is rated a 1.36 amps.
I think two would work great. I want to heat the box. So the intake will contain a heater, power supply, all electronics and one fan to push the air into the paint area. Then one fan to suck the air down through the filter and out the exhaust. Time to sketch some plans. : )