[bassin dave]

what size blower motor or how many cfm's do i need to make a smaller version of the paint booth found in the video clip "building a spray booth for painting fish carvings"?Same concept and design just smaller.

[Downriver Tackle]

Don't know about that one, but here's the cheapest and best-performing tabletop spraybooth you can get. I picked up two $12 20" window box fans from the store and stacks of 20x20 furnace filters from my local ACO Hardware for 99 cents each. I put the fans on my bench in a v-shape and put three filters on the intake side of each fan and one on the back side to act as filters. I change the front filter every 50 or so lures, then replace them all about every 500. Works amazingly well and cheap to set up and maintain!

[bassin dave]

great idea.thanks alot for the help.

[mark poulson]

Downriver,
Do you spray solvent based paints or water based paints?

Originally Posted by Downriver Tackle

Don't know about that one, but here's the cheapest and best-performing tabletop spraybooth you can get. I picked up two $12 20" window box fans from the store and stacks of 20x20 furnace filters from my local ACO Hardware for 99 cents each. I put the fans on my bench in a v-shape and put three filters on the intake side of each fan and one on the back side to act as filters. I change the front filter every 50 or so lures, then replace them all about every 500. Works amazingly well and cheap to set up and maintain!

[Downriver Tackle]

Yeah, I forgot about the solvent factor. I spray water-based. I wouldn't recommend spraying solvent through any electrical motor unless it's explosion proof.

[rjbass]

I built mine with a 1000 cfm squirrel cage blower....made by dayton. You can find them on line. Like I said, I shoot eveything through mine and never a problem.....If you are only going to do water based paints, and want a small version you could probably get by with 400 or 500 cfm.

Rod

[Downriver Tackle]

Originally Posted by rjbass

I built mine with a 1000 cfm squirrel cage blower....made by dayton. You can find them on line. Like I said, I shoot eveything through mine and never a problem.....If you are only going to do water based paints, and want a small version you could probably get by with 400 or 500 cfm.

Rod

Yeah, we skimped by with non-explosion-proof exhaust fans at a paint factory I worked at. Was fine till just after I left the company. Two weeks later I got to watch the plant burn down on the local news because of those exhaust fans. Remember that a boo-boo like that will probably viod your insurance coverage. Bad part is that an explosion-proof motor is probably around $500-1000

Box fans usually run in the range of 2000-3000 cfm on high. I'm pulling 6400 cfm with the two I have.

[rjbass]

Downriver,

If you would watch the video, you would understand how it works. It does work.....no fumes, no explosion or fire....there has to be a build up....and it has nothing to do with "skimping by".... It has to do with common sense.....and basic physics.

Rod

[Downriver Tackle]

Originally Posted by rjbass

Downriver,

If you would watch the video, you would understand how it works. It does work.....no fumes, no explosion or fire....there has to be a build up....and it has nothing to do with "skimping by".... It has to do with common sense.....and basic physics.

Rod

Geez, a bit testy eh? I said WE skimped, not you! I watched the video. I think I've got the physics covered. I totally agree with the concentration of fumes in his explanation, but there's also other factors that can play a role in paint booth fires. Trust me, I've seen dozens of our customers, even some with the safest set-ups, have fires. If you're spraying an aluminum flake paint with alot of acetone, that's the recipe for a fire, even possibly with the set-up in the video. It's just physics. That's an excellent set-up, but I'd probably get a belt driven blower with the motor mounted on the outside. That's the way our explosion-proof booth works.

Most fires or explosions that occur because of non-explosion-proof switches or motors happen when someone turns the a booth on, shop light on, or whatever. Not when the air is flowing, though it does occasionally happen then too. It's very possible to get a build-up of fumes in the booth when it's sitting idle after alot of painting and you could easily surpass the concentration needed for ignition.

I'm not trying to shoot anyone's idea down, just trying to make a safety point. You can make something as safe as possible, but nature will always build a better idiot who won't maintain the equipment or whatever. I'd hate to see someone burn their house down because they had no idea a fire was possible, even remotely. If they read this and know it is possible, then the ball's in their court.

[rjbass]

Downstream know-it-all

All I was trying to do was help the guy out.....he is not spraying lacquer or any other flammable type paint....but I guess you have to have the last word..... I guess next question I have I will have to ask you....