The design and location of building inlets and outlets to minimize wind effect and building re-entry of exhaust fumes.

Abstract Careful planning and design of the building supply inlets and exhaust stacks are essential for any modern laboratory or industrial plant. Effective ventilation and fume removal are provided by reasonable building balance, a controlled flow of air through the building, and the discharge of toxic and nuisance effluents in a manner to avoid or minimize re-entry or air pollution problems. Inlets and outlets should be designed for all wind directions. Roof inlets neutral to the wind are preferred. Wall inlets, particularly on low pressure systems, result in large variations in system volume. Stacks should discharge straight up at high velocity, and should terminate above the building eddy zone.