This book examines the computations of gas-borne dust flows in local exhaust ventilation systems and provides practical recommendations for the energy-efficient containment of dust emissions. It discusses basic approaches to operational energy savings for local exhaust ventilation systems, including shaping intake openings of open local exhaust devices after determining boundaries of vortex areas, increasing the working distance of suction openings, inhibiting carryover of dust into aspiration network by promoting rotational aerodynamic fields, and more. Color photos throughout illustrate dust behavior, flow lines, and patterns.