The advantage of using Fan filter units in clean room are : · FFU are energy efficient due to low power consumption. · Unidirectional Laminar flow can be achieved. · Air flow can be increased or decreased in a required rea. · SEPL supplies easy Filter replaceable Fan Filter Units in 2 sizes 1) 4’L X 2’W 2) 2’L X 2’W. The designed air velocity is 0.45mtrs/ sec