ANSI/ASHRAE Addendum Aj To ANSI/ASHRAE Standard 62.1-2016

ANSI/ASHRAE Addendum aj toANSI/ASHRAE Standard 62.1-2016Ventilation forAcceptable IndoorAir QualityApproved by the ASHRAE Standards Committee on June 22, 2019; by the ASHRAE Board of Directors on June 26, 2019; and bythe American National Standards Institute on July 24, 2019.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, documented, consensus action on requests for change to any part of the standard. Instructions for how to submit a change can be found on theASHRAE website e 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: orders@ashrae.org. Fax: 678-539-2129. Telephone: 404636-8400 (worldwide), or toll free 1-800-527-4723 (for orders in US and Canada). For reprint permission, go towww.ashrae.org/permissions. 2019 ASHRAEISSN 1041-2336

ASHRAE (www.ashrae.org). For personal use only. 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 62.1Cognizant TC: 4.3, Ventilation Requirements and InfiltrationSPLS Liaison: Karl L. PetermanHoy R. Bohanon, Jr.*, ChairJennifer A. Isenbeck*, Co-Vice-ChairWayne R. Thomann*, Co-Vice-ChairNick H. AgopianHugo AguilarCharlene W. BayerLance R. Brown*Robin M. BristolTina M. Brueckner*Brendon J. Burley*Abdel K. Darwich*James E. Dennison*Henry W. Ernst, Jr.Richard B. FoxEnrica GalassoElliott GallGregg Gress*Brian J. Hafendorfer*Nathan L. Ho*Elliott Horner*Eli P. Howard, III*Zalmie Hussein*Jennifer KaneLauren MacGowens*Stephany I. MasonMeghan K. McNultyMaria A. Menchaca BrandanJohn Nelson, Jr.*Lisa C. NgDaniel C. Pettway*Stephen Ray*Tom RiceDaniel J. Redmond*Jeffrey K. Smith*Erica Stewart*Drayton P. StottDean T. TompkinsDavid VigueDonald Weekes, Jr.Marwa Zaatari** Denotes members of voting status when the document was approved for publicationASHRAE STANDARDS COMMITTEE 2019–2020Wayne H. Stoppelmoor, Jr., ChairDrury B. Crawley, Vice-ChairEls BaertCharles S. BarnabyNiels BidstrupRobert B. BurkheadThomas E. CappellinDouglas D. FickMichael W. GallagherWalter T. GrondzikSusanna S. HansonRick M. HeidenJonathan HumbleSrinivas KatipamulaEssam E. KhalilKwang Woo KimLarry KoumaCesar L. LimKarl L. PetermanErick A. PhelpsLawrence J. SchoenSteven C. SillRichard T. SwierczynaChristian R. TaberRussell C. TharpAdrienne G. ThomleMichael W. WoodfordCraig P. WrayJaap Hogeling, BOD ExOMalcolm D. Knight, COSteven C. Ferguson, Senior Manager of StandardsSPECIAL NOTEThis American National Standard (ANS) is a national voluntary consensus Standard developed under the auspices of ASHRAE. Consensus is defined by theAmerican National Standards Institute (ANSI), of which ASHRAE is a member and which has approved this Standard as an ANS, as “substantial agreementreached 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 isvoluntary 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 CommitteeChair and Vice-Chair must be members of ASHRAE; while other committee members may or may not be ASHRAE members, all must be technicallyqualified 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 fora. interpretation of the contents of this Standard,b. participation in the next review of the Standard,c. offering constructive criticism for improving the Standard, ord. permission to reprint portions of the Standard.DISCLAIMERASHRAE uses its best efforts to promulgate Standards and Guidelines for the benefit of the public in light of available information and accepted industrypractices. 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 orfree from risk.ASHRAE INDUSTRIAL ADVERTISING POLICY ON STANDARDSASHRAE Standards and Guidelines are established to assist industry and the public by offering a uniform method of testing for rating purposes, by suggestingsafe practices in designing and installing equipment, by providing proper definitions of this equipment, and by providing other information that may serveto guide the industry. The creation of ASHRAE Standards and Guidelines is determined by the need for them, and conformance to them is completelyvoluntary.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 theproduct has been approved by ASHRAE.ASHRAE is a registered trademark of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.ANSI is a registered trademark of the American National Standards Institute.

ASHRAE (www.ashrae.org). For personal use only. 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 merelyinformative and does not contain requirements necessaryfor conformance to the standard. It has not been processed according to the ANSI requirements for a standardand may contain material that has not been subject topublic review or a consensus process. Unresolved objectors on informative material are not offered the right toappeal at ASHRAE or ANSI.)FOREWORDThe current standard is silent on producing ozone withinHVAC equipment. In some countries, ozone generators areaccepted as air cleaners. In a recent poll of members ofSSPC62.1, only 2% thought that having ozone producingcomponents in a ventilation system is consistent with acceptable indoor air quality.Ozone is harmful for health, and exposure to ozone creates risk for a variety of symptoms and diseases associatedwith the respiratory tract. Many products of ozone homogeneous and heterogeneous reaction processes also create risksfor health, including formaldehyde, unsaturated aldehydes(produced during the reaction of ozone with ketones and alcohols), and ultrafine particles (secondary organic aerosols).Ozone emission is thus undesirable. However, there is noconsensus on the safe level of ozone. For example, ASHRAE’sEnvironmental Health Committee issued an emerging issuebrief suggesting “safe ozone levels would be lower than 10ppb” and that “the introduction of ozone to indoor spacesshould be reduced to as low as reasonably achievable (ALARA)levels.” Still, even widely used guidelines are not entirely consistent with all available epidemiological literature on theeffects of ozone, and there is relatively little known about thelong-term effects of exposure to low concentrations of ozone.The current state of the science regarding the health effectsof ozone strongly suggests that the use of air cleaners that emitozone by design should not be permitted; the same informationand advice is given by the USEPA, among others. There is moreuncertainty about recommendations for air cleaners that do notANSI/ASHRAE Addendum aj to ANSI/ASHRAE Standard 62.1-2016use ozone by design for air cleaning but produce ozone unintentionally, as a by-product of their operation. There aredevices that emit ozone but at the same time reduce concentrations of other harmful contaminants. The state of the sciencedoes not allow making highly certain trade-offs betweenincreased exposure to ozone and the ozone reaction byproductsand reduced exposure to other contaminants.Note: In this addendum, changes to the current standardare indicated in the text by underlining (for additions) andstrikethrough (for deletions) unless the instructions specifically mention some other means of indicating the changes.Addendum aj to Standard 62.1-2016Add new Section 5.7 as shown. Renumber following sections as appropriate.5.7 Ozone Generating Devices. The use of ozone generatingdevices shall comply with the following sections.Exception to 5.7: Electronic devices used exclusively for theoperation of HVAC equipment and controls.Informative Note: Ozone generation is expected fromozone generators, corona discharge technology, some ultraviolet lights, electronic devices that create chemical reactionswithin the system, and some devices using a high voltage( 480 V). Motors and relays are examples of electronicdevices that would be exempt.5.7.1 Air Cleaning Devices. Air cleaning devices shall belisted and labeled in accordance with UL 2998.Informative Note: The use of devices not intended forair cleaning with the potential to generate ozone should beavoided.5.7.2 Ultraviolet Devices. Ultraviolet generating devices insupply air or spaces shall not transmit 185 nm wavelengths.Informative Note: UV devices used in treatment ofclosed water systems may produce 185 nm wavelengths,which may generate ozone.1

ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution,or transmission in either print or digital form is not permitted without ASHRAE's prior written permission.