After careful consideration by the Steering Committee and from input by authors, ASHRAE and AIVC have decided to postpone the conference, which was initially scheduled for September 14-16, 2020 in Athens, Greece. The IAQ 2020 conference is being postponed by one year to September 13-15, 2021 as a face-to-face conference in Athens, Greece. The Steering Committee has decided to make environmental impacts of COVID19 a part of the conference. Because of the postponement, a new call for submissions has been opened. Already accepted abstracts and submitted papers will be kept valid for the new conference dates.