Variable Air Volume System Design Calculator

Design VAV system parameters including zone airflow, diversity, and system sizing.

Total number of VAV zones in system.
zones
Average peak CFM per zone.
CFM
Expected diversity (0.7-0.9 typical).
ratio

Results

Total Zone Peak CFM-CFM
System Design CFM-CFM
Fan Power Savings vs. CAV-%
References: ASHRAE Handbook - HVAC Systems and Equipment, Chapter 41 (Variable Air Volume Systems)