ACCA Manual D: Residential Duct Systems, 2016 Edition

Design a residential duct system in less time with the streamlined Manual D duct procedure! You can apply the Manual D procedure to constant volume systems and zoned variable air volume systems, over a full range of duct construction materials.

The updated Manual D has been significantly revised to include:

• Updated and expanded VAV guidance, with detailed examples
• Impacts of excess length, sag and compression in flexible ducts
• New equivalent length values for flex duct junction boxes

Manual D provides:

• A single set of ANSI-recognized duct sizing principles and calculations that apply to all duct materials
• System operating point (supply Cfm and external static pressure), and airway sizing for single-speed and multi-speed (ECM) blowers
• A method for determining the impact of duct friction and fitting pressure drop on blower performance and air delivery
• The most comprehensive equivalent length data ever published

Manual D includes a number of informative appendices related to air distribution systems, including:

• Equipment and air-side components
• Controlling excess air when VAV dampers close
• Duct loads, duct leakage and duct system efficiency
• Air quality issues, noise control, and minimum air velocity for ducts
• Codes, standards, and best practice issues
• Commissioning issues
• And more!