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Standards 62.1 & 62.2

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The Standards for Ventilation and Indoor Air Quality 

ANSI/ASHRAE Standards 62.1 and 62.2 are the recognized standards for ventilation system design and acceptable IAQ. Get the information you need to ensure a project is designed according to the latest requirements.

ANSI/ASHRAE Standard 62.1-2016 
Ventilation for Acceptable Indoor Air Quality 

First published in 1973 as Standard 62, Standard 62.1 specifies minimum ventilation rates and other measures for new and existing

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buildings that are intended to provide indoor air quality that is acceptable to human occupants and that minimizes adverse health effects.

Whereas changes to the 2013 edition of the standard primarily focused on usability and clarity, the 2016 edition includes a major change to the scope of the standard by which residential occupancies are moved from Standard 62.1 to Standard 62.2. Other changes to the 2016 edition include the following:

  • A revised definition of "environmental tobacco smoke" (ETS) to include emissions from electronic smoking devices and the smoking of cannabis
  • Revised operations and maintenance requirements to better align Standard 62.1 with the requirements in ASHRAE/ACCA Standard 180-2012
  • New requirements to the Indoor Air Quality Procedure for determining minimum ventilation rates by considering the combined effects of multiple contaminants of concern on individual organ systems
  • A change to explicitly allow environmental health and safety professionals to determine whether a lower air class is appropriate for a particular laboratory exhaust system
  • A change to allow ventilation to be reduced to zero through the use of occupancy sensors for spaces of selected occupancy types
  • Changes related to demand control ventilation to make clear that the standard is 

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Superseded Editions of 62.1

Looking for previous revisions?
ASHRAE offers superseded editions of Standard 62.1 and User's Manuals in the ASHRAE Bookstore. Find previous editions in the 'Document History' section of the 62.1-2016 product page. 

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ANSI/ASHRAE Standard 62.2-2016
Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings

The 2016 edition of ANSI/ASHRAE Standard 62.2 makes two major changes to scope by including unvented space heaters as a potential contaminant source and by expanding "covered dwellings" to include all multifamily dwelling units. 62-2-2016.jpg

Standard 62.2 defines the roles of and minimum requirements for mechanical and natural ventilation systems and the building envelope intended to provide acceptable indoor air quality in low-rise residential buildings. As in the previous editions of this standard, there are three primary sets of requirements and a number of secondary ones. The three primary sets involve whole-building ventilation, local demand-controlled exhaust, and source control. The secondary requirements focus on properties of specific items needed to achieve the main objectives of the standard. Standard 62.2 applies to spaces intended for human occupancy within single-family houses and multifamily structures, including manufactured and modular houses. This standard does not apply to transient housing such as hotels, motels, nursing homes, dormitories, or jails.

The PDF download of Standard 62.2, in addition to offering immediate access to the content, presents the climate zone map in color for enhanced readability.

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Indoor Air Quality Guide

Indoor Air Quality Guide.jpg ASHRAE's Indoor Air Quality Guide: Best Practices for Design, Construction and Commissioning is designed for  architects, design engineers, contractors, commissioning agents, and all other professionals concerned with IAQ.   This comprehensive publication provides both summary and detailed guidance in the form of a printed book and   accompanying CD. 

 The complete text may purchased from the ASHRAE Bookstore, or downloaded for free.

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