Our project, as with most projects, has various air handling units with different OSA rates. To achieve the 14,000 cuft / sf, do we calculate the building as whole, or does each space have to achieve 14,000 cuft / sf from the unit serving that area? We have a couple rooms with small split systems and these spaces would take over 60 days under the 'before occupancy' flush-out, but if counted in aggregate, then the flush-out would only take 9 days. Please advise. Thanks.