ANSI/ASHRAE 62.1-2022: Ventilation for Acceptable Indoor Air Quality

ANSI/ASHRAE Standard 62.1-2022: Ventilation for Acceptable Indoor Air Quality defines minimum requirements for mechanical and natural ventilation systems in commercial, institutional, and industrial buildings. Widely referenced by model codes such as the International Building Code, this standard is critical for achieving acceptable indoor air quality (IAQ) in non-residential environments.

Highlights:

• Defines procedures for assessing outdoor air quality and ventilation by occupancy type
• Revised Section 5 reorganizes systems/equipment content by airflow path
• Updates IAQ Procedure with design compound guidance and mass-balance modeling
• Establishes separation distances for exhaust air and dew point limits for cooled spaces
• Classifies ventilation zones and defines airflow effectiveness and breathing zone metrics
• Covers design, installation, commissioning, and maintenance of ventilation systems
• Includes appendices for healthcare settings, air quality evaluation, compliance paths, and simplified rate calculations
• Incorporates addenda through Appendix Q as part of its continuous maintenance model

Who It’s For:
Designed for mechanical engineers, HVAC professionals, code officials, and facility managers responsible for designing and maintaining compliant ventilation systems that promote occupant health and comfort.

ASHRAE 62.1-2022