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This standard applies to spaces intended for human occupancy within
single-family houses and multifamily structures of three stories or fewer above
grade, including manufactured and modular houses. This standard does not apply
to transient housing such as hotels, motels, nursing homes, dormitories, or
This standard considers chemical, physical, and biological contaminants that
can affect air quality. Thermal comfort requirements are not included in this
standard (see ANSI/ ASHRAE Standard 55-2004, Thermal Environmental Conditions
for Human Occupancy).
While acceptable indoor air quality is the goal of this standard, it will not
necessarily be achieved even if all requirements are met
a. because of the diversity of sources and contaminants in indoor air and
the range of susceptibility in the population;
because of the many other factors that may affect occupant perception and
acceptance of IAQ, such as air temperature, humidity, noise, lighting, and
c. if the ambient air is unacceptable and this air is brought into the
building without first being cleaned (cleaning of ambient outdoor air is not
required by this standard);
d. if the systems are not operated and maintained as designed; or
e. when high-polluting events occur.
This standard does not address unvented combustion space heaters.
ASHRAE Standard 62.2-2007 Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings (ANSI Approved)