Manual D - Residential Duct Systems

Design a residential duct system in less time with procedures from Manual D - Residential Duct Systems, 3rd Edition.

This edition of Manual D - Residential Duct Systems 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 - Residential Duct Systems 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, and the most comprehensive equivalent length data ever published. 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.

Manual D - Residential Duct Systems 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; minimum air velocity for ducts; codes, standards and best practice issues, and commissioning issues.

2009.