High spray rate equipment first reduces the amount of coating input and over-spray required per qualified product, so it can reduce the mass load of VOCs entering the spray room, leveling area, flash dry area and subsequent exhaust gas system, and reduce the load of paint fog, filtration consumables and cleaning. However, the high spray rate does not automatically reduce the exhaust volume of the spray room year-on-year. The air volume of the spray room is still subject to personnel and equipment safety, paint mist capture, combustible vapor control, workpiece opening, supplementary exhaust air organization and process stability. Only after the air volume balance, concentration check, safety assessment and on-site verification are completed, can it be judged whether the processing air volume sent to the RTO or the rotor system can be reduced by means of zonal capture, circulating air, variable air volume or rotor concentration.
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