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ASHRAE 62.1-2019 Standard Ventilation for Acceptable Indoor Air Quality (ANSI Approved)

Product Code/ISBN: 86170

First published in 1973 as Standard 62, Standard 62.1 specifies minimum ventilation rates and other measures for new and existing buildings that are intended to provide indoor air quality that is acceptable to human occupants and that minimizes adverse health effects.

The revised 2019 edition of the standard includes significant changes, including:

  • New informative tables of ventilation rates per unit area for checking new and existing buildings, ventilation calculations
  • Simplified version of the Ventilation Rate Procedure improving calculations for system ventilation efficiency and zone air distribution effectiveness
  • Modified Natural Ventilation Procedure calculation methodology
  • Revised scope to specifically identify occupancies previously not covered
  •  Additionally:

    • Natural ventilation now requires considering the quality of the outdoor air and interaction of the outdoor air with mechanically cooled spaces.
    • Humidity control requirements are now expressed as dew point and not as relative humidity.