Recently a client was comparing Aircuity to a constant volume 6 air changes per hour (ACH) design for a new lab building. As we know from our 20 years of experience in analyzing building ventilation performance, a constant volume approach doesn’t account for the number of indoor air quality (IAQ) events that occur even on a daily basis.
In order to assist the customer with this comparison, Aircuity’s Client Success team analyzed the prior week’s data for the 187-room project. They found that, during the one-week period, 198 events occurred where the Aircuity system detected an IAQ issue and drove the air change rate over 6 ACH. On an annual basis that’s a total of 10,296 events and 55 IAQ events per room per year. If a constant volume design of 6 ACH was used in the lab, there would have been many periods during which the air wasn’t at safe and healthy levels.