NFPA 92 Standard for Smoke Control Systems 2021 NFPA 92-1 Copyright 2020 National Fire Protection Association. All Rights Reserved NFPA92 Standard for SmokeControl Systems 2021Edition This edition of NFPA 92, Standard for Smoke Comtrol Systems, was prepared by the Technical Committee on Smoke Management Systems. It was issued by the Standards Council on October 5, 2020, with an effective date of October 25, 2020, and supersedes all previous editions. This document has been amended by one or more Tentative Interim Amendments (TIAs) and/or Errata. See“Codes & Standards" at wwwnfpa.org for more information. This edition of NFPA 92 was approved as an American National Standard on October 25, 2020 Origin and Development of NFPA92 The NFPA Standards Council established the Technical Committee on Smoke Management Systems in 1985 and charged it with addressing the need for guidelines and materials on smoke management in buildings. The Committee's first document, NFPA 92A, Recommended Practice for Snoke-Contral Systens, was published in 1988 and addressed smoke control utilizing barriers, airflows, and pressure differentials so as to confine the smoke of a fire to the zone of fire origin to maintain a tenable environment in other zones. The complex problem of maintaining tenable conditions within of the physics involved and thus was reserved for another document, NFPA 92B, Guide for Smoke Managenent Systems in Malls, Atnia, and Large Areas, first published in 1991. Between 1991 and 2009, NFPA 92A and NFPA 92B were separately maintained. In 2006, NFPA 92A was rewritten as a standard with mandatory provisions regarding design, installation, and testing of smoke-control systems and was renamed Smoke-Control Systens Utilizing Barriers and Pressure Differences. In 2005 and 2006, both documents were reorganized to com ply with the Manual of Style for NrPA Technical Committee Documents. Both documents eventually contained many of the same requirements for design objectives, activation, and installation. In the Annual 2011 revision cycle, NFPA 92A and NFPA 92B were withdrawn and replaced with a new document, NFPA 92, Standard for Smoke Control Systems. NFPA 92 was created using requirements changes. The new document used the term smoke control systemisto address both containment and management systems. With the consolidation effort, the new standard covered the following topics: design of smoke management systems and calculations, design of smoke containment systems, design of stairwell pressurization systems, and testing requirements. The 2015 edition included editorial revisions and new requirements addressing draft curtain materials. The 2018 edition added requirements regarding the verification of dedicated smoke control equipment through use of the weekly self-test function. A new annex on tenability was added to provide guidelines for designers to assess tenable conditions in spaces protected by smoke control systems, in connected spaces, and of meas of egress elements during the operation of a smoke control system. The 2021 edition ofNFP4 92 has revised the requirements for the design number in Chapter 4 and the number of doors required to be open during testing in Chapter 8 for smoke containment control strategy. New Annex A material has been added to provide guidance on systems with makeup air velocities exceeding 200 ft/min (1.02 m/s). Equations and values throughout the document have been updated to provide both I-P and SI values. NFPA and National Fire Protection Asociation are registered trademarks of the National Fire Protection Association, Quincy, Massachusetts 02169 92-2 SMOKE CONTROL SYSTEMS Technical Committee on SmokeManagement Systems Allyn J. Vaughn, (Chair NV5/ JBA Consulting Engineers, NV [SE] Elyahu Avidor, Tel Aviv, Israel [RT] Jeffrey A. Maddox, The Fire Consultants, Inc., CA [SE] Rep. Standards Institution of Israel Cameron J. McCartney, National Research Council of Canada, Carl F. Baldassarra, Wiss Janney Elstner