Manual D – Residential Duct Systems, 3rd Edition

The Manual D – Residential Duct Systems, 3rd Edition published by ACCA provides the approved procedures for designing residential HVAC duct systems in accordance with industry standards and building-code requirements. It details airflow calculations, friction-rate determination, duct sizing, equipment selection coordination, register and grille performance, system balancing, and layout considerations for flexible, rigid, and fiberglass duct systems. Used within One Exam Prep study programs, this edition supports contractors and exam candidates by establishing the standardized methods required for code-aligned residential duct-system design and installation.

Manual D - Residential Duct Systems, 3rd Ed. 

The ANSI recognized national standard for residential HVAC duct design will help you design a duct system in less time. The popular and accurate procedure has been revised to include updated and expanded VAV guidance, with detailed examples; impacts of excess length, sag and compression in flexible ducts; and new equivalent length values for flex duct junction boxes. Manual D, from the Air Conditioning Contractors of America (ACCA), provides a single set of ANSI recognized duct sizing principles and calculations that apply to all duct materials.