This manual provides the duct system designer with the technical information required to design a complete air distribution system. This text has been extensively revised and updated, and now includes key portions of the previously separate Duct Design Home Course Study material.

PURPOSE

The purpose of any heating, ventilating, and air conditioning (HVAC) duct system is to provide:

a. Thermal comfort

b. Humidity control

c. Ventilation air

d. Air filtration

However, a poorly designed or constructed HVAC duct system may result in a system that is costly to operate, noisy, and does not meet occupant comfort requirements.

This manual and associated SMACNA publications will assist both the system designer and the installer to provide an HVAC system that meets all these basic requirements.