Salient Features Cleanliness : ISO Class 5 as per ISO 14644-1 S.S.304 work table Polycarbonate front door Mini Pleat HEPA Filter- separator less (H-14 rating) Technical Specifications Direction of flow : Vertical Velocity : 90 FPM ± 20% Particle retention : Above 0.3 micron Blower Assembly : 1/6 HP, 1440 RPM Noise level : 65 decibel ± 5% Rate of air flow : 0.40 to 0.75 M/Seconds (90 FPM) Vibration level :