Our LEED team has developed a 2-week building flush-out protocol for credit 3.2; however, our mechanical engineers have requested some clarification regarding the building flush out requirements to ensure that the procedure is executed in strict accordance with LEED. Credit 3.2 requires a minimum two-week building flush-out with new filtration media at 100% outside air after construction ends and prior to occupancy. Shall we interpret this to mean 100% of the air handlers outside air capacity or 100% outside air with zero return air? If 100% outside air with no return air is required, this implies that air handlers should be equipped with airside economizers sized for 100% of design airflow. Typically, economizers are not practical or advisable in hot-humid climates. West Palm Beach has design temperatures of 90
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