Sam or Mary Yancy on sat 10 may 03
Years ago when I was painting custom motorcycles for a living, I used a large 24 inch (enclosed motor) exhaust fan, mouted to a main external wall with a 24" by 24" hole cut into the wall. Pulled quite a vacume. Other Intake vents in my workplace were furnace filtered to eliminate/reduce any incoming dust but not teh exhaust fan. To save the outside invironment I made a 24" by 24" square elbow (90 degrees) facing down from the fan and mounted to the exterior wall. Below the outlet (which was about 8" in height from the outside cement patio flooring), I placed a large 30" by 30" container filled with water. The walls of the container were 7" tall so the space space between the exhaust and water was not more then 1". Worked extremly well (I think) . All dust and paint dust residue would end up in the water container - which I cleaned daily (straining/replacing the water and placing the sludge residue in a toxic waste container for pickup). When I was airbrushing or painting I would "box in the fan to the size required and spray paint in front of the fan. Also used it for much of the bondo and fiberglass work sanding I did. I kept the fan on most of the time as it is noisy, however
generally my workplace was basically clean and dust free. As Jim Murphy mentioned in his post, I have seen and worked on very large running water based "coolers/filters'"on buildings but generally on the intake side. They work to filter out most dust and polen and "humidify" and cool the air but I don't agree with them thinking about 'leigoners desease. They tend to get moldy. I don't like swamp coolers for that reason. This is only one way to go. Best to BUY a commercial system when you can - to be absoultly safe. Sam in Daly City.
Jim Murphy wrote:on 5/9/03 8:00 AM, Fraser Forsythe at scribdibulus@YAHOO.CA wrote:
> The only viable
> system is a booth with a water-based scrubber. That
> is, a strong blower at one end, an aluminum filter and
> a recycled flow of water running over the filter. This
> system should do the trick. Of course a mask should be
> worn and the exhaust should be vented outside. So far,
> however, I only know this in theory. No one sells a
> device like it, and I dont know how to build this
> system myself.
There are commercially available water-wash spray booths. I'll bet they're
expensive though. See link below:
Perhaps a DIYer could make something similar using a "shower" stall, pump,
tubing, and fan.
Best regards,
Jim Murphy
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