What is Manual D Duct Design and The ACCA?
All duct systems have to meet certain code and size requirements. For residential air duct designs ACCA’s Manual D is the procedure recognized by the American National Standards Institute (ANSI) and specifically required by residential building codes. ACCA stands for Air Conditioning Contractors of America. They construct most of the codes and other modifications that are approved by the EPA and government mandates. They use a checklist to see if a duct system reaches all of the necessary requirements. They use a graphical size chart to calculate proper sizes. ( listed below)

Why Do Duct Systems Have to Meet Requirements?
The importance of duct system requirements, size, and standards is absolute in Hvac. Without these standards duct systems and energy efficiency of units would almost be non existent. Without proper sizing duct systems would be incredibly leaky and inefficient. In order to reach proper energy efficiency the duct system must be absolute and correct. Here at A+ comfort LLc we pride ourselves on top standard ductwork. We know the importance of a good duct system. For an amazing duct job contact A+ comfort llc today at (256)-585-2550 and let one of our reps help you today!







