The CellGard ES Model NU-480 Laminar Flow Class II Biological Safety Cabinet (LFBSC) is a bench/table top model, utilizing an Energy Saver DC ECM motor optimally determined forward curved fan for each model size/width to maximize both energy efficiency and filter loading capacity. The Energy Saver ECM motor is controlled to airflow setpoints via a solid-state DC motor controller with digital dual thermister airflow sensors that provide an automatic compensation (constant volume control) for both filter loading and line voltage variances. The NU-480, when used with proper technique, is an effective primary engineering control in obtaining the optimum product quality while reducing the potential for exposure of both product and personnel to airborne biological or particulate chemical agents in low to moderate risk-hazard research and drug preparation or product operations, as prescribed by the Center for Disease Control (CDC) Atlanta, Georgia.