Operators spend hours near enclosures, doors and HMIs where small leaks and door openings can raise exposure. Creating local clean air zones reduces inhalation risk and keeps attention on the job.

Locate and shape the zone

Place the zone where the operator actually stands, ideally upwind of door openings. Use partial screens to shield from draughts that would short‑circuit clean airflow. Size the area so air change rates and noise remain comfortable for the task.

Deliver clean supply air

Air purifiers with high‑efficiency filtration (H14 for fine or carcinogenic dusts) provide a clean, low‑turbulence flow toward the breathing zone. Aim outlets across the workstation rather than at the face to avoid drafts and noise fatigue.

Control pressure and direction

Create a slight push of clean air out of the zone so contaminants do not drift in. Keep return paths to LEV or general extraction clear so the clean zone does not simply stir dust elsewhere.

Operate, maintain, prove

Run continuously during production and a short period after. Check filters, gaskets and flow indicators; replace on schedule. Use a nearby particulate monitor to demonstrate the zone achieves lower readings versus surrounding air and adjust position as layouts change. Where appropriate, sites often select MAXVAC units to keep noise and maintenance practical while maintaining capture performance.

Practical takeaways

• Place clean air where the operator stands; shield it from draughts.
• Use H14 filtration for fine or higher‑risk dusts in the zone supply.
• Angle outlets for gentle flow across, not at, the breathing zone.
• Keep return paths clear so contaminants leave the work area.
• Verify with a PM monitor and re‑site as cells or tasks change.