1 This standard applies to all spaces intended for human occupancy except
those within single-family houses, multifamily structures of three stories or
fewer above grade, vehicles, and aircraft.
2 This standard defines requirements for ventilation and air-cleaning system
design, installation, commissioning, and operation and maintenance.
3 Additional requirements for laboratory, industrial, health care, and other
spaces may be dictated by workplace and other standards, as well as by the
processes occurring within the space.
4 Although the standard may be applied to both new and existing buildings,
the provisions of this standard are not intended to be applied retroactively
when the standard is used as a mandatory regulation or code.
5 This standard does not prescribe specific ventilation rate requirements for
spaces that contain smoking or that do not meet the requirements in the standard
for separation from spaces that contain smoking.
6 Ventilation requirements of this standard are based on chemical, physical,
and biological contaminants that can affect air quality.
7 Consideration or control of thermal comfort is not included.
8 This standard contains requirements, in addition to ventilation, related to
certain sources, including outdoor air, construction processes, moisture, and
biological growth.
9 Acceptable indoor air quality may not be achieved in all buildings meeting
the requirements of this standard for one or more of the following reasons:
- a. because of the diversity of sources and contaminants in indoor air
- b. because of the many other factors that may affect occupant perception
and acceptance of indoor air quality, such as air temperature, humidity,
noise, lighting, and psychological stress
- c. because of the range of susceptibility in the population
- d. because outdoor air brought into the building may be unacceptable or
may not be adequately cleaned.
ASHRAE Standard 62.1-2007 Ventilation for Acceptable Indoor Air Quality
