Diy portable spray paint booth3/7/2024 ![]() ![]() Comfortably over my needed specs, but that's good, as it gives me some flexibility in case I have to increase the duct length or otherwise change something. Shaded pole (not rated explosion proof, but shaded pole is still much, much better than having the motor fully exposed in the air stream), and 510. The blower I ended up getting was this one: I prefer metric for most things, but Imperial is what the formulas on the website use. My apologies for all the Imperial measurements. Multiply by 3 since I'd be using flexible duct, and I need a fan capable of delivering 400CFM at 1.2"SP. 5", (that will also give me a certain built-in safety margin). The static pressure table on the website doesn't have figures for 6" 400CFM, but loose extrapolation of the figures it does give implies I can round it up to. That's (2' x 2') x 100 = 400CFM for the booth itself. Originally the booth I was going to make would have been a 2x2 foot face cross-draft design, with ~6 feet of 6 inch duct w/ 2 right angle bends. ![]() I still want/need to do it, but I need to figure out how to reshuffle my living space for it, so right now my "spray booth" is the great outdoors and a respirator. then my living situation changed, and I had to shelve the project. I made plans to: figured out what size booth I wanted and how much ducting it would need for where it would be, did the math and bought a blower that matched the specs. ![]()
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