The fan will suck and pull the air to HEPA filter(H14 HEPA filter),which captures the dust and particles. The HEPA filtered air will be distributed in unidirectional form into the working zone. The downflow of air will carry the dust generated during powder processing into a pre-filter.After pre-filtered, the air will go through a fine filter (F8 filter) and is typically re-circulated. + The HEPA-filtered air is divided into 2 parts. -90% of the air flows through a diffuser and forms a vertical laminar flow into the working zone -10% of HEPA filtered air is bled out of the booth through the air outlet to maintain the working zone under negative pressure, minimizing airborne contamination breakout