ATLANTA - Lessons learned from 30 years of ventilation practices, as well as user input and developments in research, led to key changes to the American Society of Heating, Refrigerating, and Air-Conditioning Engineers' (ASHRAE's) 2004 ventilation standard.
ANSI/ASHRAE Standard 62.1-2004, "Ventilation for Acceptable Indoor Air Quality," specifies minimum ventilation rates and IAQ requirements for commercial and institutional buildings.