ANSI/ASHRAE/SMACNA Standard 126-2016 (Supersedes ANSI/ASHRAE/SMACNA Standard 126-2008)
Method of Testing HVAC Air Ducts
Approved by ASHRAE on June 30, 2016, by the Sheet Metal and Air Conditioning Contractors’ National Association on May 9, 2016, and by the American National Standards Institute on July 1, 2016. ASHRAE Standards are scheduled to be updated on a five-year cycle; the date following the Standard number is the year of ASHRAE approval. The latest edition of an ASHRAE Standard may be purchased on the ASHRAE website (www.ashrae.org) or from ASHRAE Customer Service, 1791 Tullie Circle, NE, Atlanta, GA 30329-2305. E-mail:
[email protected] Fax: 678539-2129. Telephone: 404-636-8400 (worldwide) or toll free 1-800-527-4723 (for orders in US and Canada). For reprint permission, go to www.ashrae.org/permissions. © 2016 ASHRAE
ISSN 1041-2336
ASHRAE Standing Standard Project Committee 126 Cognizant TC: 5.2, Duct Design SPLS Liaison: Peter Simmonds Kevin J. Gebke*, Chair Alex M. Kouvolo*, Vice-Chair Gary L. Miller, Secretary
Herman F. Behls* Eli P. Howard, III*
Ralph Koerber, I* Stephen R. Wiggins*
* Denotes members of voting status when the document was approved for publication
ASHRAE STANDARDS COMMITTEE 2016–2017 Rita M. Harrold, Chair Steven J. Emmerich, Vice-Chair James D. Aswegan Niels Bidstrup Donald M. Brundage Waller S. Clements Drury B. Crawley John F. Dunlap, James W. Earley, Jr. Keith I. Emerson
Julie M. Ferguson Michael W. Gallagher Walter T. Grondzik Vinod P. Gupta Susanna S. Hanson Roger L. Hedrick Rick M. Heiden Srinivas Katipamula Arsen K. Melikov R. Lee Millies, Jr.
Cyrus H. Nasseri David Robin Peter Simmonds Dennis A. Stanke Wayne H. Stoppelmoor, Jr. Jack H. Zarour William F. Walter, BOD ExO Patricia Graef, CO
Stephanie C. Reiniche, Senior Manager of Standards
SPECIAL NOTE This American National Standard (ANS) is a national voluntary consensus Standard developed under the auspices of ASHRAE. Consensus is defined by the American National Standards Institute (ANSI), of which ASHRAE is a member and which has approved this Standard as an ANS, as “substantial agreement reached by directly and materially affected interest categories. This signifies the concurrence of more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that an effort be made toward their resolution.” Compliance with this Standard is voluntary until and unless a legal jurisdiction makes compliance mandatory through legislation. ASHRAE obtains consensus through participation of its national and international members, associated societies, and public review. ASHRAE Standards are prepared by a Project Committee appointed specifically for the purpose of writing the Standard. The Project Committee Chair and Vice-Chair must be members of ASHRAE; while other committee members may or may not be ASHRAE members, all must be technically qualified in the subject area of the Standard. Every effort is made to balance the concerned interests on all Project Committees. The Senior Manager of Standards of ASHRAE should be contacted for a. interpretation of the contents of this Standard, b. participation in the next review of the Standard, c. offering constructive criticism for improving the Standard, or d. permission to reprint portions of the Standard.
DISCLAIMER ASHRAE uses its best efforts to promulgate Standards and Guidelines for the benefit of the public in light of available information and accepted industry practices. However, ASHRAE does not guarantee, certify, or assure the safety or performance of any products, components, or systems tested, installed, or operated in accordanc