R ASHRAE STANDARD ANSI/ASHRAE Standard 52.2-2025 (Supersedes ANSI/ASHRAE Standard 52.2-2017) Includes ANSI/ASHRAE addenda listed in Appendix L Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size See Informative Appendix L for approval dates by ASHRAE and the American National Standards Institute. This Standard is under continuous maintenance by a Standing Standard Project Committee (SSPC) for which the Standards Committee has established a documented program for regular publication of addenda or revisions, including procedures for timely, documented, consensus action on requests for change to any part of the Standard. Instructions for how to submit a change can be found on the ASHRAE website (wwW.ashrae.org/continuous-maintenance). The latest edition of an ASHRAE Standard may be purchased from the ASHRAE website (www.ashrae.org) or from ASHRAE Customer Service, 180 Technology Parkway, Peachtree Corners, GA 30092. E-mail: [email protected]. Fax: 678-539-2129. 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. @ 2025 ASHRAE ISSN 1041-2336 PDF includes hyperlinks for convenient navigation. Click on a reference to a section, table, figure, or equation to jump to its location. Return to the previous page via the ANSI bookmark menu. www.ansi.org ASHRAE Standing Standard Project Committee 52.2 Cognizant TC: 2.4, Particulate Air Contaminants and Particulate Removal Equipment SPLS Liaison: William M. Healy · ASHRAE Staff Liaison: Carmen King Todd A. McGrath,* Chair Marisa Jimenez-Segovia* Matthew Brooks Jonathan Rajala* Mark A. Tucker,* Vice Chair C. Hwakong Cheng* Chrystal Jolliffe John Jay Reese Jenny M. Berens,* Secretary Michael D. Corbat Carolyn M.L. Kerr* Raymond W. Rite Oludamilola Adesanya Brian C. Krafthefer* Mark Davidson Jim Rosenthal* Tim Ahn Michael C. Flom Roberta MacGillivray* Terri Self* Keith Alderson Vivekanand Gaur Matt Middlebrooks Robert A. Singer* Wane A. Baker Bryan Lee Gerhardt Kathleen Owen Matt Solis Russell L. Baldinger* John Park Joel Swann Henry T. Greist Rahul Bharadwaj* Michelle Hernandez James S. Parris Todd Usher Brandon E. Boor* Sanjeev K. Hingorani* Joseph J. Pessa R. Vijayakumar Vincent Hwang Thad Ptak* Jennifer Wong* Randy Brannen * Denotes members of voting status when the document was approved for publication ASHRAE STANDARDS COMMITTEE 2024-2025 Douglas D. Fick, Chair Jaap Hogeling Kenneth A. Monroe Paolo M. Tronville Jennifer A. Isenbeck Daniel H. Nall Adrienne G. Thomle, Vice Chair Douglas K. Tucker Hoy R. Bohanon, Jr. Philip J. Naughton William F. Walter Satish N. lyengar Kathleen Owen Kelley P. Cramm Phillip A. Johnson David P. Yuill Gwelen Paliaga Abdel K. Darwich Paul A. Lindahl, Jr. Susanna S. Hanson, BOD ExO Drake H. Erbe Karl L. Peterman Wade H. Conlan, CO Julie Majurin Patricia Graef Lawrence C. Markel Justin M. Prosser William M. Healy Margaret M. Mathison Christopher J. Seeton Ryan Shanley, 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. Committee Chair and Vice-Chair must be members of ASHRAE; while other committee members