Intake side. The Chinook II uses Garmat's ceiling-diffusion plenum with polyester or fiberglass diffusion media filling the panel grid. Standard panel dimensions follow the Garmat downdraft-compatible ceiling set in either 38x102 or 38x62 configurations depending on which Chinook II generation you have, the nameplate plus a single ceiling-panel photo confirms the set. AMU pre-filter cycle is typically 60-90 days for the Chinook II's air-handler stage; the ceiling diffusion media itself cycles 30-60 days depending on production tempo.

Exhaust side. Pit-mounted exhaust pad media, the Chinook II uses the same exhaust-pit slot family as the broader Garmat downdraft line. The catalog kits for the Chinook II exhaust default to fiberglass arrestor pad (the most common spec across the installed base), with polyester arrestor as the upgrade path for shops running higher-solids or waterborne where the fiberglass loads faster than the cycle wants. The 25-entry filter media taxonomy on this site distinguishes fiberglass-arrestor, polyester-arrestor, accordion-paper, paper-mesh, and pocketed-paper as distinct exhaust media types, the Chinook II's verified-fitment kit names the specific media-type slug per slot.

Slot expectations are queued for re-mapping. A note on transparency: the booth-model slot expectations row for the Chinook II in our database is currently flagged in the verification queue as pending re-mapping against the new 25-entry media taxonomy (the platform expanded from 9 to 25 media types on 2026-05-09). The kit you receive is correct, we're updating the metadata record, not the physical fitment.

Cycle math. Intake-ceiling at 30-60 day cycle; AMU pre-filter at 60-90 day cycle; exhaust-pit pad at 7-14 day cycle for high-production collision shops, 21-30 day cycle for lower-volume. Subscription delivers each position on its calibrated cadence; the maintenance log flags the position when the calibrated cycle is approaching.

Chinook II installations run under regional AQMD or state-DEP authority for VOC and HAP control plus federal OSHA spray-finishing standards (29 CFR 1910.94). Most independent collision shops with a Chinook II are in 6H Area Source category under NESHAP Subpart HHHHHH, which requires the booth to be operated and maintained per the manufacturer's specifications and demands documentation of filter changes. Subscription delivery records produce the maintenance log most 6H authorities expect when they audit. The Chinook II's published capture-efficiency documentation accompanies each fitment shipment.