Intake vs. exhaust filters: identify the position before you choose.

A spray booth may contain filters at the incoming-air side, in a ceiling or supply section, and along the exhaust path. These positions have different roles. A filter that fits one location is not automatically suitable for another, even if a supplier or maintenance team uses a similar nickname.

Trace the airflow through the booth

Start with the equipment drawing, airflow arrows, or a walkthrough with the maintenance team. Depending on the booth design, air may pass through an intake or pre-filter, then through a ceiling or supply-air section, across the work area, and toward exhaust filtration. The exact arrangement varies by system, so confirm the real installation rather than assuming every booth uses the same sequence.

What the positions generally mean

• Intake or pre-filter: installed upstream to intercept incoming airborne particles according to the system design.
• Ceiling or supply-air filter: positioned where air is supplied to the booth or coating zone. Confirm the ceiling grid, plenum, media direction, and access method.
• Exhaust or paint arrestor media: installed in the exhaust path to help intercept airborne paint overspray before air reaches downstream equipment, as designed for that booth.

The wording above describes common positions, not a substitute for the booth manufacturer's documentation or local environmental and safety requirements.

How to avoid ordering the wrong filter

Photograph the filter in place before removal, capture the airflow direction, and label whether the photo shows intake, ceiling/supply, or exhaust. Measure the filter itself and the opening separately. Record the holding frame or support grid, media format, coating process, and how the maintenance team currently replaces it.

Do not compare a ceiling media product against an exhaust paint arrestor only by color or thickness. The installation point, airflow, process conditions, and system requirements define the selection discussion.

Information to share with a supplier

• Booth type and the exact filter location in the airflow path
• Dimensions, support frame, roll/pad/cut-sheet format, and replacement quantity
• Coating material and application method, where relevant
• Equipment documentation or stated airflow / performance requirements
• Photos of the current filter, label, holder, and airflow direction
• Destination, packaging preference, and order timing

For position-specific details, read the guides to ceiling filter media and paint arrestor filter media. You can also compare the air-intake pre-filter media, ceiling media, and paint arrestor media product pages.