C. Factory-fabricated Duct Systems
D. Field-fabricated Duct Systems
E. Draw Bands Used With Flexible Duct
G. Product MarkingsProduct Markings
H. Dampers to Prevent Air Leakage
K. Porous Inner Core Flex Duct
L. Duct System Sealing and Leakage Testing
N. Forced Air System Duct Sizing, Airflow Rate and Fan Efficacy
O. Airflow and Fan Efficacy Testing Versus Return Duct Sizing
Q. Zonally Controlled Central Forced Air Cooling Systems
R. Zoned Systems and Airflow and Fan Efficacy Requirements
S. Indoor Air Quality and Mechanical Ventilation