ABSTRACT
Industrial ventilation (IV) is the use of supply and exhaust ventilation to control chemical emissions and employee exposures in the industrial/manufacturing workplace. It can also be used to control hazardous temperature extremes. Heating, ventilating, and air conditioning (HVAC) systems are used to provide comfort, health, and well-being for employees in all occupancies. When ventilation is being considered for emission or exposure control, the design team must know everything about the behavior of the emission source, the employee or occupant, the air and spacial characteristics, and their relationships to each other. Emission sources often contain aerosols, or particulate matter. To make a ventilation system effective, we must know something about particles and their behavior. Gases and vapors in air are single-molecule substances at room temperature. Dilution ventilation is an ancient and effective method of exposure control. The approach allows chemical emissions to mix with the ambient air in a space.
