No. Laminar Flow Workstations are designed to circulate clean, filtered air across the work surface to protect delicate processes from airborne contaminants. The filtered air exits from the front of the work surface toward the user. Both vertical (downflow) and horizontal (across flow) versions provide the same level of protection using HEPA filters at the top or rear of the cabinet. Cabinet selection depends on the size of the work surface and the vertical space desired.