A spray booth not equipped with a water washing system as described in subparagraph (4) of this paragraph. A dry spray booth may be equipped with
distribution or baffle plates to promote an even flow of air through the booth or cause the deposit of overspray before it enters the exhaust duct; or
overspray dry filters to minimize dusts or residues entering exhaust ducts; or
overspray dry filter rolls designed to minimize dusts or residues entering exhaust ducts; or
where dry powders are being sprayed, with powder collection systems so arranged in the exhaust to capture oversprayed material.
overspray dry filters to minimize dusts; or