​Manual D– Residential Duct Systems

​Manual D® – Residential Duct Systems (3rd Edition), developed by the Air Conditioning Contractors of America (ACCA), is the ANSI-recognized national standard for designing residential HVAC ductwork. It provides a comprehensive methodology for accurately sizing and configuring duct systems to ensure efficient airflow, energy efficiency, and occupant comfort in single-family homes and townhouses.

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