NSF.ORG NSF NSF International Standard American National Standard NSF/ANS4-2024 Commercial Cooking Rethermalization, and Powered Hot Food Holding and Transportation Eguipment ANSI NsF International, an independent, not-for-profit nongovernmental organization, is dedicated to being the leading global provider of public health and safety-based risk management solutions while serving the interests of all stakeholders. This standard is subject to revision. Contact NSF to confirm this revision is current. Users of this standard may request clarifications and interpretations, or propose revisions by contacting: Chair, Joint Committee on Food Equipment c/o NSF International 789 North Dixboro Road, P.O. Box 130140 Ann Arbor, Michigan 48113-0140 U.S.A. Phone: (734) 769-8010 Email: [email protected] Web: <www.nsf.org> NSFIANSI 4 - 2024 NSF International Standard / American National Standard for Food Equipment - Commercial Cooking, Rethermalization, and Powered Hot Food Holding and Transport Eguipment Standard Developer NSF International Designated as an ANSI Standard February 7, 2024 American National Standards Institute - Prepared by The NSF Joint Committee on Food Equipment Recommended for adoption by The NSF Public Health Council Adopted by NSF International August 1958 Revised July 1967 Revised August 1968 Revised April 1970 Revised July 1971 Revised April 1973 Revised June 1986 Revised May 1992 Revised May 1996 Revised March 1997 Revised May 1999 Revised November 2000 Revised March 2002 Revised October 2005 Editorial revision November 2005 Revised February 2006 Editorial revision May 2006 Revised April 2007 Editorial revision May 2007 Revised April 2009 Addendum November 2009 Revised October 2014 Revised November 2016 Revised February 2020 Revised June 2021 Revised April 2023 Revised August 2024 Published by NSF International P.0. Box 130140, Ann Arbor, Michigan 48113-0140, U.S.A For ordering copies or for making inquiries regarding this standard, please reference the designation "NSF/ANSI 4 - 2024." Copyright 2024 NSF International Previous editions 2022, 2021, 2020, 2016, 2014, 2009, 2007, 2006, 2005, 2002, 2000, 1999, 1997, 1996, 1992, 1986, 1973, 1971, 1970, 1968, 1967, and 1958. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from NSF International. Printed in the United States of America. ii Disclaimers NsF International (NSF), in performing its functions in accordance with its objectives, does not assume or of NSF represent its professional judgment. NSF shall not be responsible to anyone for the use of or reliance upon this standard by anyone. NsF shall not incur any obligation or liability for damages, including consequential damages, arising out of or in connection with the use, interpretation of, or reliance upon this standard. It is the responsibility of the user of this standard to judge the suitability of the ANs for the user's purpose. Participation in NsF standards development activities by regulatory agency representatives (federal, state, or local) shall not constitute their agency's endorsement of NsF or any of its standards. Preference is given to the use of performance criteria measurable by examination or testing in NsF standards development when such performance criteria may reasonably be used in lieu of design, materials, or construction criteria. A dual-unit technical standard may use both non-Sl (English System of Measurement) and SI units of measure (SI is the International System of Units, commonly known as the metric system). Unless stated may be provided in parentheses immediately following the primary units when required for clarity or informational purposes. As such, these values stated are not interchangeable, should be regarded separately, and used independently. Interchanging values from both unit systems may result in errors. The illustration