Feature 01 Air Quality Standards requires an assessor to perform post-occupancy testing. Which option best describes this requirement?

• A. No, it does not require a post-occupancy performance test.
• B. Yes, it requires a performance test after occupancy.
• C. Only if occupancy exceeds a predefined threshold.
• D. Not specified in the feature.

Answer: (B)

Verifying real-world air quality after people start using the space is what post-occupancy testing achieves. For this feature, the assessor must perform a post-occupancy performance test to confirm that the ventilation, filtration, and source control deliver the intended indoor air quality once the space is occupied. This captures how actual usage, occupancy levels, equipment emissions, and everyday operation impact pollutant levels and ventilation effectiveness beyond what pre-occupancy tests can show. The test typically checks metrics like CO2 to gauge ventilation adequacy, as well as particulate matter, VOCs, humidity, and temperature, using calibrated instruments over a representative period. A compliant result demonstrates that the space meets the air quality requirements in real conditions; there isn’t a provision that omits the test, ties it only to a threshold, or leaves the requirement unspecified.