Intake side. Entry-face intake panels are the finish-quality stage: they filter the shop air that will travel horizontally across your wet paint. Tacky polyester panel media is the standard fill. In a crossdraft, intake media quality matters more than owners expect, because there is no top-down air curtain to push stray dust off the panel; whatever gets in rides the airflow straight across the vehicle.

Exhaust side. The exhaust wall arrestor bank takes the booth's entire overspray load and is the position regulators care about. Fiberglass arrestor pad is the baseline; polyester arrestor is the step up when higher-solids coatings load fiberglass too fast. This bank blinds from the middle outward, in line with where the work sits, so inspect the center pads, not the corners.

Change triggers. A manometer across the exhaust bank is cheap and definitive: change at your marked pressure point. Without one, the fallback signs are overspray drifting back toward the painter and visibly caked center pads. Fitment sizes for both positions are confirmed by the WERCS service team on your first order, since the EZ Classic record in our catalog is still marked needs-verification.

Three frameworks meet at this booth's exhaust wall. EPA 6H requires spray-applied coatings containing target HAPs to pass through filter technology achieving at least 98 percent capture efficiency, and a maintained two-stage arrestor bank is the normal way a crossdraft demonstrates it. OSHA 1910.94(c) requires spray areas to maintain ventilation that keeps vapors and mists moving away from the operator, which is a filter-loading question as much as a fan question. NFPA 33 treats the loaded bank as combustible fuel and expects scheduled removal and safe disposal. None of these care what the booth cost. Dated filter delivery records answer most inspector questions before they are asked.