Intake ceiling. Fourteen pads at 39 x 39 inches fill the Concept's ceiling plenum. Two current SKUs match the position: 560-100, the PA 560 G-10 pad, and 02560393914, the Filtrair FF560GX diffusion filter in the same cut. Both are ceiling-diffusion polyester. Fourteen pads is a modest set to replace, so there is little excuse for running a tired ceiling in this booth.

Exhaust grid. The exhaust side takes fiberglass arrestor roll media, with 14AG41300 at 41 inches by 300 feet for shops that cut their own and 200-090 at 40 inches by 100 feet as the smaller commitment. Because this fitment was discovered through filter-catalog documentation rather than a field visit, we treat exhaust grid dimensions as confirm-first: measure one opening, count the grid, and the roll width and cut plan follow.

Cycle math. Roll stock changes the maintenance arithmetic in the shop's favor. A single roll covers many changes, so the marginal cost of swapping exhaust media early is small. Let the ceiling run its longer cycle; feed the exhaust grid promptly.

NESHAP 6H requires spray operations using target coatings to exhaust through filter technology, operated and maintained with records; for a legacy booth, consistent media in documented sizes plus dated change records is what demonstrating compliance actually looks like. OSHA 1910.94(c) requires maintained ventilation velocity during spraying, and an old downdraft loses that velocity through blinded exhaust media long before anything mechanical fails. NFPA 33 limits combustible overspray accumulation, so timely arrestor changes and same-day disposal of loaded media are fire code, not housekeeping. An inspector meeting a decades-old booth looks harder at the records, not softer.