Various factors make odor control an important consideration inventilation engineering: (1) contemporary construction methods result inbuildings that allow less air infiltration through the building envelope; (2)indoor sources of odors associated with modern building materials, furnishings,and office equipment have increased;(3) outdoor air is often polluted; and (4)energy costs encourage lower ventilation rates at a time when requirements fora relatively odor-free environment are greater than ever. This chapter reviewshow odoriferous substances are perceived. Chapter 46 of the 2019 ASHRAE Handbook—HVAC Applications coverscontrol methods. Chapter 10 of this volume has more information on indoorenvironmental health.

Odor Sources
Sense of Smell
Factors Affecting Odor Perception
Odor Sensation Attributes
Dilution of Odors byVentilation
Odor Concentration
Olf Units

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