I use such a device in the welding area of my machine shop to remove smoke from the air. The technique is effective, but works best if you can position the intake right near the source. Our commercial unit is portable and has an 8" flexible overarm which is self supporting. I think it was about $4000 Cdn, a few years ago when I bought it.
The collection plates must be about 10" x 16" at about 1/2" seperation, stacked 18" high.
The charge plates are only maybe 2.5" wide, and the ionizing wires are about 2" seperation, as are the plates.
The charge plates and the collection plates are built as slide in drawers, so you can pull them out and wash them. I think they are of galvanized construction.
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