Ensure that you include time for building flush-out or testing in the construction schedule as early as possible.

For Path 1 (continuous flush-out), 14,000 ft3 of air must be moved while not exceeding 60% relative humidity and 60ºF. This may take up to two weeks depending on system capacity.
For Path 2, a continuous flush-out of 3,500 ft3 of air must be completed and then a phased flush-out until 14,000 ft3 of air has been moved. This duration varies: 3,500 ft3 may take just a few days, but the remaining phased flush-out may take several weeks.

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. 

Option 1: Flush-Out

Check filters after the flush-out is complete. Some or all of the filters may be ready for replacement, although this is not required by the credit.  

Prior to move-in, ensure that the requirements of either Option 1: Flush-Out, or Option 2: Air Testing, have been met. 

The following work must be completed prior to flush-out or testing to ensure that the air quality isn't compromised afterward.

Jobsite safety meetings or regular subcontractor meetings are a good place to educate your construction team about LEED requirements for IAQ management, as well as other related requirements for construction waste management, low-emitting materials, and other similar issues.

The requirements of this credit apply to all spaces within the building envelope. This credit does not differentiate between regularly occupied and non-regularly-occupied spaces. 

If not completed in pre-construction, your IAQ management plan should be developed by the general contractor and incorporate input from your entire project team, specifically the technical requirements for flush-out identified by the mechanical engineer and any special scheduling required by the building owner or tenants. The plan should be shared with the whole project team, including all subcontractors who will be working with any interior materials and fittings. 

Your project team should clearly define who will be responsible for managing flush-outs and IAQ procedures.