Re: Spraybooth Queston on fan placement?

I built a spray booth using a wood frame covered with a foam board exterior. The fan is side mounted and to the left rear. Since I'm right handed this is where the overspray goes when I aim at something placed in the middle of the booth.

Val Kraut

Baffle it or make a plenium(?). On mine its a 3 inch or so space at the back of the box with a furnance filter across the front and the fan mounted on the back board.

Tom

Most commercial automotive spraybooths use a positive pressure system where air is drawn in from outside, heated, dried and forced through filters through the top of the booth exiting again through filters and passing into the open air... obviously this is impractical for an open booth but it's done for a reason, the exiting fumes contain atomised thinners, solvents and paint particles and when mixed with an electric motor of a fan nasty things can happen... my recommendation here would be to extract from both top and bottom using some kind of ducting (with filters) and keep the fan as far as possible from the booth. on my own airbrushing booth I have the fan mounted at the end of a 2m long length of flexible ducting which is filtered using a recirculating water filter. Just my two cents worth :-)

Or, you could use a centrifugal fan which avoids the issue entirely because its motor isn't in the airflow.

Could you tell a bit more about the water filter? How does it work? I saw a spray booth once that used one, but that was just a bucket with water, with the ventilation hose stuck into the lid of the bucket. I don't see how this would do any good.

My cardbox booth is usually at least 3 ft wide by 2 ft high by 2 ft deep. I usually hold the model when I spray paint. I haven't experienced any problems with overspray settling back on the model. On overspray my greater concern is that atomized paint shouldn't drift out of the spray booth to settle on the furniture or floor.

"Harro de Jong" wrote

a good suggestion but not an easy animal to find with mains volatge supply.

actually if the hose was partially submerged into the water it would work fine, the air would be drawn through the water which would trap the paint particles and airborne solvents... of course you need to change the water frequently... and you certainly shouldn't pour it down the drain... My filter uses a similar system as a final filter but also has screens over which a constant flow of water is fed, this traps most of the paint particles leaving the final filter to take care of the aerosol solvents, of course you could also use activated charcoal filters for this but they are less effective.

Are you married? Too?