Thad Posted January 6, 2009 Report Share Posted January 6, 2009 I use automotive paints and I spray my clear coat, so keep that in mind. I was told by a maker of spray booths that I would need a fan that was capable of doing 750 cfm. Where can I find a fan/blower for this? Also what filter material do you guys use in your booth? Quote Link to comment Share on other sites More sharing options...
plt Posted January 7, 2009 Report Share Posted January 7, 2009 (edited) Iam in the commercial paint industry the size of fan that you use needs to fit the size of your area.750cfm is fine but the area would need to small.A company called Northland Tools sells small industrail fans from 12 to 16 inches,as for the filter material good ole blue furnace filters work great. Edited January 7, 2009 by plt Quote Link to comment Share on other sites More sharing options...
VANNDALIZER Posted January 8, 2009 Report Share Posted January 8, 2009 I would highly reccomend an explosion proof motor. Quote Link to comment Share on other sites More sharing options...
Thad Posted January 8, 2009 Author Report Share Posted January 8, 2009 I would highly reccomend an explosion proof motor. I want one, I just don't know where to get one. Quote Link to comment Share on other sites More sharing options...
clamboni Posted January 8, 2009 Report Share Posted January 8, 2009 If your fan is MOVING 750 cfm, there's no need for an explosion proof motor. The concentration of the fumes will never get high enough to cause a problem. But just because it's rated for 750 doesn't mean it'll move 750. The hoses greatly restrict airflow, even big hoses, so keep that in mind. If you're building a booth and not just a fan to clear an area, the fan only needs to move enough air to keep the fumes from coming back out of the booth as you spray. If you can feela slight airflow in the window of the booth, you're most likely fine. And if you still get fumes out, try making the window smaller. What's important is the airflow in the window. Try a local HVAC guy.......if they have an old furnace that they replaced, they'll probably give you the blower for free. That's what I used and it works great. Building a Spray Paint Booth for painting fish carvings. I did need to filter it though, as the dick nite's clear didn't dry before hitting the fan. As an afterthought, I just built a frame for the filter over each air intake and used furnace filters. Quote Link to comment Share on other sites More sharing options...
Vodkaman Posted January 12, 2009 Report Share Posted January 12, 2009 (edited) We must have a member with HVAC knowledge. Could someone post how to calculate cfm's, tube diameters and any thing else necessary. True, a little knowledge is a dangerous thing, but surely it will be better than no knowledge. Lets face it, members are just going to wing it anyway. If someone is going to take on this task, it would be better in a new thread, named properly, so that the information will be easy to find. Dave Edited January 12, 2009 by Vodkaman Quote Link to comment Share on other sites More sharing options...
Kajan Posted January 15, 2009 Report Share Posted January 15, 2009 500 CFM / sq foot of hood area at 0 static pressure will work. Granger has a 16" fan that would prob work for your application. Quote Link to comment Share on other sites More sharing options...
Kajan Posted January 15, 2009 Report Share Posted January 15, 2009 For some reason I could'nt edit my post. Anyways I made mistake what I typed, its 100 CFM / sq foot of hook area. YOu can figure it horizontally of open area is good. Sorry about the screw up Quote Link to comment Share on other sites More sharing options...
davemyway Posted January 27, 2009 Report Share Posted January 27, 2009 i don't know if this will help u but i install hvac pipe ... and mostly your cfm is 4'' 50 cfm 5'' 75 cfm 6'' 100cfm 7'' 150cfm 8'' 200cfm 10'' 400cfm or a ton of air Quote Link to comment Share on other sites More sharing options...
Vodkaman Posted January 30, 2009 Report Share Posted January 30, 2009 Davemyway, thank you for the figures. I did a few calculations with the numbers. Excluding the 10 Quote Link to comment Share on other sites More sharing options...
dramone Posted January 30, 2009 Report Share Posted January 30, 2009 maybe this link could help: Brian's Model Cars::BMC Quote Link to comment Share on other sites More sharing options...
Vodkaman Posted January 30, 2009 Report Share Posted January 30, 2009 Excellent link Dramone, just what I was looking for. Thankyou. Dave Quote Link to comment Share on other sites More sharing options...
dramone Posted February 2, 2009 Report Share Posted February 2, 2009 anytime Dave! Quote Link to comment Share on other sites More sharing options...
Kajan Posted February 5, 2009 Report Share Posted February 5, 2009 Ma' y'all let us know what y'all come up with:teef: Quote Link to comment Share on other sites More sharing options...
MTfishingrods Posted February 5, 2009 Report Share Posted February 5, 2009 i don't know if this will help u but i install hvac pipe ...and mostly your cfm is 4'' 50 cfm 5'' 75 cfm 6'' 100cfm 7'' 150cfm 8'' 200cfm 10'' 400cfm or a ton of air If I remember right these figures are good for up to a 30 foot run of pipe. Subtract 10 feet for any 90 degree bend put into the pipe. After that your CFMs drop significantly. (keep in mind I am trying to remember back 4 to 5 years since the last time I designed a duct system. I hoe I am remembering right.) Quote Link to comment Share on other sites More sharing options...
