Process exhaust refers to contaminated air, vapors, and particulates removed directly from industrial equipment and manufacturing operations through dedicated ventilation systems. Unlike general building exhaust, process exhaust contains specific pollutants generated by machinery, chemical reactions, welding, or production activities. These systems must be sized and filtered according to the exact contaminants produced during each process.
Capture and Treatment Systems
Process exhaust systems use local hoods positioned at emission sources to capture contaminants before they spread into the workplace. Ductwork transports exhaust to treatment equipment such as baghouse filters, electrostatic precipitators, scrubbers, or carbon adsorbers depending on contaminant type. Air velocities in capture hoods range from 300 to 1,500 feet per minute based on process requirements and ACGIH standards. Final discharge must comply with EPA regulations limiting particulate matter, VOCs, and other pollutants.
Environmental and Regulatory Compliance
Facilities must install process exhaust systems to meet Clean Air Act standards and obtain air permits for permitted sources. Continuous monitoring and regular maintenance prevent equipment damage and ensure consistent contaminant removal. Proper process exhaust design reduces environmental impact, improves nearby air quality, and protects worker health from occupational exposure.