Unidirectional Vertical Flow Clean Air Systems in S.S. 304 or GI powder coated CONSTRUCTION and comprising, as standard features, MINIPLEAT HEPA filter/s (99.97% efficiency with 0.3 micron filtration); motor blower assembly/ies; prefilter/s (5 micron); white lights; ceiling suspension arrangement; Differential Pressure Gauge/s; Feather Touch ON/OFF switches for blower & lights.