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ACCA Manual D – Residential Duct System Design

At Enerlogic, achieving occupant satisfaction is our primary goal when designing your HVAC system. Our staff of experienced, trained professionals works hard to ensure your home buyers are satisfied with the comfort level they experience in their new homes.

In addition to the Air Conditioning Contractors of America (ACCA) Manuals J and S, a Manual D Residential Duct Design installation is required per the Mechanical Section of the 2015 International Residential Code (IRC):

“M1601.1 Duct design. Duct systems serving heating, cooling and ventilation equipment shall be installed in accordance with the provisions of this section and ACCA Manual D, the appliance manufacturer’s installation instructions or other approved methods.”


Manual D - Residential Duct Systems

Our ACCA Manual D analysis is the third of four steps needed to make sure your home’s HVAC system performs at the highest level of comfort. We utilize the data from your ACCA Manuals J and S calculations to design the optimal duct system for your building.

We take the time to check that the duct system carrying the air is properly designed to eliminate issues such as:

  • Reduced occupant comfort
  • Premature equipment failure
  • Reduced noise
  • Excessive energy use and costs
  • Potential occupant health and safety risks


We also provide a complete report with a clearly detailed schematic drawing of the duct system, overlaid onto your building plan, which includes the location and size of:

  • Trunk lines
  • Branch ducts
  • Outlet registers
  • Inlet grilles

If you would like to see an example of an ACCA Manual D report, use the Contact Form to request a copy either of these.

For more information, download the ACCA Verifying Manual D, which includes a checklist.

Our staff at Enerlogic would be happy to assist you with all of your ACCA Manual J, S, D and T questions and provide you with both design and installation verification services in a timely manner.

At Enerlogic we would be happy to answer all of your HVAC System design questions and provide you with design services in a timely manner.

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