GBCI is denying credit compliance on this basis. It does not offer a path for making up for this issue. The LEED Reference Guide states: "Not all outside air is equal. Depending upon geography and season, it can be very cold or damp. Because of this, prudent limits have been set to ensure no harm comes to the building and potentially to the occupants." While this is not stated explicitly in the reference guide, the logic is that this air potentially damages the building in a way that cannot be mitigated by additional flushout time or volume. Considering this, projects in hot, humid climates should consider using air testing instead of flushout to attempt this credit.