If occupants need to move into the space before the total volume of outside air has been applied, they may do so after at least 3,500 cubic feet of outside air per square foot of area has been delivered. After that, the space must be ventilated at a minim

If occupants need to move into the space before the total volume of outside air has been applied, they may do so after at least 3,500 cubic feet of outside air per square foot of area has been delivered. After that, the space must be ventilated at a minimum rate of 0.30 cfm per square foot of outside air (or the design minimum) for at least 3 hours before occupancy until the total of 14,000 cubic feet per square foot has been supplied.