Recommended air changes per hour table
Use with caution
ACH targets vary by occupancy, contaminants, code, and system purpose. Verify the governing requirement; do not use a generic table as a safety or healthcare design standard.
Formula
CFM = room volume × ACH ÷ 60
Reference notes
DOE ventilation guidance shows application-specific exhaust examples, while TSI defines ACH as room-air replacement rate.
FAQ
What ACH should I use?
Use the applicable code, standard, and qualified design review.