Fresh air supply is the lifeline of a building, affecting indoor air quality and the health and comfort of the building’s occupants. The fresh air supply system will exist for the lifetime of the building, yet it is often overlooked as a critical design aspect. Although the design of mechanical exhaust systems are intended to remove and discharge unwanted or hazardous emissions away from buildings, these air contaminants often find their way back into the building due to interactions with the wind. Re-entrainment of these unwanted contaminants compromises air quality. Re-entrainment of external exhaust emissions into internal building spaces is a common cause of air quality problems and reduced indoor environmental quality (IEQ) within buildings.
By gaining an understanding of the most problematic types of exhaust sources, air-sensitive receivers and pathways of contamination, lab designers will be better equipped to identify potential issues and incorporate mitigation strategies into their designs. This session provides a comprehensive review of common exhaust re-entrainment issues and effective methods for achieving enhanced indoor environmental quality. Through the presentation of fundamental concepts and illustrative case studies, participants will obtain a greater awareness of potential issues and mitigation strategies that may be applied to their laboratory building designs.
• Gain an understanding of the nature and significance of commonly encountered exhaust sources and air-sensitive receptors.
• Understand the causes, pathways and consequences associated with exhaust re-entrainment issues.
• Understand how site-specific conditions, localized wind flow patterns and building design can affect the both the severity and frequency of exhaust re-entrainment issues.
• Apply the lessons learned into their design projects to reduce air quality issues and achieve enhanced indoor environmental quality
AIA LU Credit: 1
LEVEL: ALL LEVELS AND BACKGROUNDS