The Horizontal Laminar airflow provides product proteciton within the work area, which is confined by clear glass panels and sliding glass doors.Room air is taken in from the side of the cabinet through a pre-filter with 90% efficiency which traps particles of 10 and above.Perforated Stainless Stell diffuser screen protects the HEPA filter and maintain uniform air flow velocity within the work area, Vertical Laminar Flow occupies less space and can be installed in a small area.