Proper duct sizing is covered in which standard publication?

The proper sizing of ductwork is specifically addressed in the ACCA Manual D. This manual outlines the procedures and calculations necessary to size ducts appropriately for residential and light commercial HVAC systems. It provides guidelines that help in determining the correct duct diameters, layout, and airflow requirements based on the specific needs of the space and the HVAC system being installed. By following the methodologies presented in Manual D, contractors can ensure efficient airflow, reducing energy costs and improving system performance.

The ASHRAE Handbook is a critical resource for a broader range of HVAC-related topics, including design and equipment selection, but it does not provide the specific duct sizing information that Manual D offers. The SMACNA Manual covers various aspects of duct construction and system design but is generally more focused on the fabrication and installation practices than on the detailed sizing calculations. The NTEA Guidelines primarily address topics related to the truck equipment and transportation industry, which are not directly relevant to HVAC duct sizing. Thus, ACCA Manual D stands out as the primary resource for proper duct sizing in HVAC applications.