ASHRAE+62.1-2022+(1) - Page 009
Extracted Content
CFR Code of Federal Regulations CIBSE Chartered Institution of Building Services Engineers CREL chronic reference exposure levels DC design compound DCV demand controlled ventilation DL design limit EHS environmental health and safety EPA Environmental Protection Agency ETS environmental tobacco smoke HVAC heating, ventilation, and air conditioning IAQ indoor air quality IAQP Indoor Air Quality Procedure I-P inch-pound ISO International Organization for Standardization LCI lowest concentration of interest MERV minimum efficiency reporting value NAAQS National Ambient Air Quality Standards NFPA National Fire Protection Association NSF National Sanitation Foundation O&M operations and maintenance OS occupied standby PM particulate matter SI International System of Units SMACNA Sheet Metal and Air Conditioning Contractors National Association UL Underwriters Laboratories VAV variable air volume VRP Ventilation Rate Procedure
4. OUTDOOR AIR QUALITY
Outdoor air quality shall be investigated in accordance with Sections 4.1 and 4.2 prior to completion of ventilation system design. The results of this investigation shall be documented in accordance with Section 4.3.
4.1 Regional Air Quality. The status of compliance with the National Ambient Air Quality Standards (NAAQS) shall be determined for the geographic area of the building site.
4.1.1 In the United States, compliance status shall be either in “attainment” or “nonattainment” with the NAAQS. In the United States, areas with no U.S. Environmental Protection Agency (U.S. EPA) compliance status designation shall be considered “attainment” areas.
Informative Notes:
- The NAAQS are shown in Informative Appendix E, Table E-1.
- The U.S. EPA list of nonattainment areas can be found at www.epa.gov/green-book.
- Air quality data collected at outdoor monitors across the U.S. can be found at www.epa.gov/out- door-air-quality-data.
- Internet links to detailed information on the NAAQS and contaminant levels for other select counties and regions can be found in Informative Appendix E.
4.2 Local Air Quality. An observational survey of the building site and its immediate surroundings shall be conducted during hours the building is expected to be normally occupied to identify local contaminants from surrounding facilities that will be of concern if allowed to enter the building.
4.3 Documentation. Documentation of the outdoor air quality investigation shall be reviewed with building owners or their representative and shall include the following as a minimum:
a. Regional air quality compliance status b. Local survey information
- Date of observations
ANSI/ASHRAE Standard 62.1-2022 7