ASHRAE Standard 62 was first published in 1973, with the title "Standards for Natural and Mechanical Ventilation." The most recent version, des15ignated as 62.1 and titled Ventilation for Acceptable Indoor Air Quality was published in 2004, with some relatively minor revisions added since that time in a supplemental publicaiton. Throughout its existence, Standard 62 has generated controversy, but at the same time it has served the building industry and the public as the most prominent standard on ventilation and indoor air quality (IAQ).