ANSI/ASHRAE 62.1-2019: Ventilation for Acceptable Indoor Air Quality

ANSI/ASHRAE Standard 62.1-2019: Ventilation for Acceptable Indoor Air Quality establishes minimum requirements for ventilation system design, installation, and maintenance in commercial and institutional buildings. This standard is a foundational reference for achieving acceptable indoor air quality (IAQ) and reducing health risks associated with poor ventilation.

Highlights:

• Updated Ventilation Rate Procedure with enhanced zone-level calculation methods
• Revised Natural Ventilation Procedure, including outdoor air quality and mechanical integration
• Prohibits use of ozone-generating air-cleaning devices
• Requires humidity control using dew point rather than relative humidity
• Separates patient care areas now governed under ASHRAE/ASHE Standard 170
• Clarifies definitions for spaces, ventilation zones, and contaminant sources
• Outlines requirements for design documentation, commissioning, and IAQ performance testing
• Includes appendices with ventilation rate rationale, IAQ procedures, and engineering tools

Who It’s For:
A critical reference for mechanical engineers, HVAC designers, facility managers, and code officials involved in ensuring compliant ventilation design and indoor air quality performance.

ASHRAE-62.1-2019