- A phased flush-out is possible if different sections of the building are completed at different times, which is common in multi-tenant or mixed-use project types.
- In facilities where air quality is particularly critical, such as healthcare and laboratory buildings, owners may require IAQ testing as part of standard building practice.
- Buildings with large numbers of identical rooms with separate ventilation zones—such as hotel rooms or apartment units—have been allowed to perform random sampling as an alternative approach in situations when the delivery of outside air—on an air-change-per-hour basis—and the materials in a ventilation zone are identical. Project teams should confirm with GBCI that this is still applicable in LEED 2009.
