© ASHRAE. Per international copyright law, additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE's prior written permission. ANSI/ASHRAE/ASHE Addendum p to ANSI/ASHRAE/ASHE Standard 170-2017 Ventilation of Health Care Facilities Approved by ASHRAE Standard Committee and the ASHRAE Board of Directors on February 5, 2020; by the American Society for Healthcare Engineering on December 19, 2019; and by the American National Standards Institute on March 2, 2020. This addendum was approved 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, docu- mented, 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 (https://www.ashrae.org/continuous-maintenance). 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: 678-539-2129. Tele- phone: 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. © 2020 ASHRAE ISSN 1041-2336 © ASHRAE. Per international copyright law, additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE's prior written permission. ASHRAE Standing Standard Project Committee 170 Cognizant TC: 9.6, Healthcare Facilities SPLS Liaison: Russell C. Tharp Michael P. Sheerin*, Chair Caleb Haynes Kenneth R. Mead* Frederick E. Granzow*, Secretary Robert N. Heinlein, Jr. Farhad Memarzadeh* David J. Anderson Richard D. Hermans* Michael S. Meteyer Amit Bhansali Nolan Hosking Richard D. Moeller* Robert Booth Aaron L. Johnson Kenneth A. Monroe Brendon J. Burley Michael R. Keen* Paul T. Ninomura* John M. Dombrowski* Dan Koenigshofer* Russell N. Olmsted* Travis R. English Paul R. Kondrat Heather L. Platt Gulledge Douglas S. Erickson* Peter H. Langowski* Maya Salabasheva Jeremy P. Fauber* Roger W. Lautz Amber M. Scales Jonathan J. Flannery* Pavel V. Likhonin Kevin A. Scarlett* Steven D. Friedman* Michael D. Locke Charles J. Seyffer Glenn Saint Aubin Gall* Stephanie J. Mages Gordon P. Sharp* Danette J. Hauck David M. Mason Erica Stewart* * Denotes members of voting status when the document was approved for publication ASHRAE STANDARDS COMMITTEE 2019–2020 Wayne H. Stoppelmoor, Jr., Chair Susanna S. Hanson Lawrence J. Schoen Drury B. Crawley, Vice-Chair Rick M. Heiden Steven C. Sill Els Baert Jonathan Humble Richard T. Swierczyna Charles S. Barnaby Srinivas Katipamula Christian R. Taber Niels Bidstrup Essam E. Khalil Russell C. Tharp Robert B. Burkhead Kwang Woo Kim Adrienne G. Thomle Thomas E. Cappellin Larry Kouma Michael W. Woodford Douglas D. Fick Cesar L. Lim Craig P. Wray Michael W. Gallagher Karl L. Peterman Jaap Hogeling, BOD ExO Walter T. Grondzik Erick A. Phelps Malcolm D. Knight, CO Steven C. Ferguson, 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 accordance with ASHRAE’s Standards or Guidelines or that any tests conducted under its Standards or Guidelines will be nonhazardous or free from risk. ASHRAE INDUSTRIAL ADVERTISING POLICY ON STANDARDS ASHRAE Standards and Guidelines are established to assist industry and the public by offering a uniform method of testing for rating purposes, by suggesting safe practices in designing and installing equipment, by providing proper definitions of this equipment, and by providing other information that may serve to guide the industry. The creation of ASHRAE Standards and Guidelines is determined by the need for them, and conformance to them is completely voluntary. In referring to this Standard or Guideline and in marking of equipment and in advertising, no claim shall be made, either stated or implied, that the product has been approved by ASHRAE. © ASHRAE. Per international copyright law, additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE's prior written permission. (This foreword is not part of this standard. It is merely informative and does not contain requirements necessary for conformance to the standard. It has not been processed according to the ANSI requirements for a standard and may contain material that has not been subject to public review or a consensus process. Unresolved objectors on infor- mative material are not offered the right to appeal at ASHRAE or ANSI.) FOREWORD Addendum p incorporates updates to Table 7.1. a. A column is created indicating spaces where unoccupied turndown is acceptable. b. Table 6.4 is incorporated into Table 7.1 to remove confusion so that filter requirements will be uniformly applied. c. Space names are aligned with names appearing in FGI 2014 and indicating the appropriate sections in FGI 2014 where that space is referenced. Numerous spaces have been relocated within the table with no changes to their previous requirements, For these spaces previous locations are shown in strikethrough while the new locations are shown in underline. Note: In this addendum, changes to the current standard are indicated in the text by under- lining (for additions) and strikethrough (for deletions) unless the instructions specifically men- tion some other means of indicating the changes. Addendum p to Standard 170-2017 Revise Section 5 as shown. 5. PLANNING Owners/managers of health care facilities shall prepare a detailed program that shall include the clinical service expected in each space, the specific user equipment expected to be used in each space, and any special clinical needs for temperature, humidity, and pressure control. The program shall include space names and paragraph numbering references from the applicable version of the FGI Guidelines for Design and Construction of Hospitals and Outpatient Facili- ties for each space noted within the program. This program shall be prepared in the planning phase of design. Revise Section 6.4 as shown. The remainder of Section 6.4 is unchanged. 6.4 Filtration. Filter banks shall be provided in accordance with Table 6.47.1. Each filter bank with an efficiency of greater than MERV 12 shall be provided with an installed manometer or differential pressure measuring device that is readily accessible and provides a reading of differ- ential static pressure across the filter to indicate when the filter needs to be changed. All of the air provided to a space shall be filtered in accordance with Table 6.47.1, except as otherwise indicated in Sections 7.1, 8.1, and 9.1 for spaces that allow recirculating room HVAC units. Informative Note: For more information, see CDC (2003) in Informative Appendix B. Table 6.4 Minimum Filter Efficiencies Filter Bank No. 1 Filter Bank No. 2 Space Designation (According to Function) (MERV)a (MERV)a Operating rooms (ORs); inpatient and ambulatory diagnostic and therapeutic radiology; 7 14 inpatient delivery and recovery spaces Inpatient care, treatment, and diagnosis, and those spaces providing direct service or 7 14 clean supplies and clean processing (except as noted below); AII (rooms) Protective environment (PE) rooms 7 HEPAc,d Laboratory work areas, procedure rooms, and associated semirestricted spaces 13b NR NR = not required a. Informative Note: The minimum efficiency reporting value (MERV) is based on the method of testing described in ANSI/ASHRAE Standard 52.2 (ASHRAE [2017a]). b. Additional prefilters may be used to reduce maintenance for filters with efficiencies higher than MERV 7. c. As an alternative, MERV-14 rated filters may be used in Filter Bank No. 2 if a tertiary terminal HEPA filter is provided for these spaces. d. Informative Note: High-efficiency particulate air (HEPA) filters are those filters that remove at least 99.97% of 0.3 micron-sized particles at the rated flow in accordance with the testing methods of IEST RP-CC001.6 (IEST [2016]). ANSI/ASHRAE/ASHE Addendum p to ANSI/ASHRAE/ASHE Standard 170-2017 1 © ASHRAE. Per international copyright law, additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE's prior written permission.