Indoor air quality investigation before and after relocation to WELL-certified office buildings

Air pollutant exposure in workplace environments has been associated with health and cognitive outcomes of workers. While green building certification programs have instrumental promoting indoor air quality (IAQ), the present literature indicates inconsistent evidence. Recent emergence proliferation WELL program that prioritizes human evoked new questions about its effectiveness relation to IAQ. To investigate certification, we quantitatively compared IAQ results before after relocation two WELL-certified office buildings using same cohort occupants. Physical measures included integrated samples TVOC, individual VOC, formaldehyde acetaldehyde, NO2, SO2, O3 longitudinal records CO2 size-resolved particles. Complementary survey responses satisfaction thermal comfort were collected from ~250 employees. For majority pollutants, there was no significant concentration difference between non-WELL buildings, but not always. The had substantially higher levels TVOC VOC paints, especially shortly relocation. However, statistically improvement into regardless pollution levels, possibly confounded by environment, awareness or other non-measurable factors.