• Jun 13, 2026 Ansi Z9 2 1960 y recommend higher and more precisely controlled face velocities for fume hoods, often in the range of 80 to 120 fpm, but with variable air volume (VAV) controls to optimize airflow based on real-time conditions. In contrast, ANSI Z9.2 1960 set a fixed minimum velocity, re BY Leah Glover
