SmartFlow Duct Calculator
Airflow
CFMTonnage
Min 50 / Max 80,000 cfm / ± 50;
Prihoda Fabric Duct Sizing Recommendations
Straight Duct
4"
1500
FPM (max)
System with fittings/direction changes
4"
1200
FPM (max)
Sound sensitive application
4"
1000
FPM (max)