Manual D
Why Manual D?
Manual D is the ACCA approved method for designing duct systems in residential applications. It provides a systematic approach to to calculating and designing HVAC duct systems based on airflow, equipment specifications, and individual room heating and cooling needs. This method ensures that the system delivers adequate and balanced air distribution throughout the home.
Key Benefits
Adequate Airflow To All Rooms: A properly performed duct design ensures that even the farthest reaching duct will supply adequate airflow to the space it serves.
Elimination of Excessive Noise: Proper duct sizes eliminates high velocity which results in excessive noise through register grilles.
Limited Wear on Blower Motors: Adequately sized duct systems reduces the total external static pressure that the blower fan has to act against, resulting in less wear and tear on blower motors.
Limited Energy Usage: Lower total static pressures reduces blower amp draw which results in less electrical energy usage of the system.
