IAQ testing should be worked into the construction schedule as it will occur close to project close-out, generally when the construction schedule is most critical. Testing will take a least one day, but could take longer depending on the number of tests required.
Whether you have completed a full or a phased flush-out, record the performed flush-out dates, schedule, humidity levels, temperatures and total air volumes and provide this information in a narrative for credit documentation.
During the occupied phase of a flush-out under Option 1, Path 2, a minimum ventilation rate must begin at least three hours before daily occupancy and continue while the space is occupied (through the end of the business day, or other occupancy duration) at a minimum rate of 0.30 cfm per ft2, or the design minimum rate determined in IEQp1, whichever is greater.
If you are pursuing a phased flush-out under Option 1, Path 2, ensure that the flush-out continues after move-in until a total of 14,000 ft3 of outside air has been supplied per ft2 of floor area before the HVAC system is switched into its normal operational mode.
Per the credit requirements, during flush-out, the rate of outside air should not cause the interior temperature to drop below 60oF, and relative humidity should not exceed 60%.
Once a general construction schedule has been established, your project’s mechanical engineer should calculate the estimated time expected for completing a flush-out according to either Path 1 or Path 2, based on climatic conditions for the given time of year.
