Ventilation effectiveness | U.S. Green Building Council
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LEED BD+C: New Construction | v2 - LEED 2.1

Ventilation effectiveness

EQc2 | Possible 1 point


Provide for the effective delivery and mixing of fresh air to support the safety, comfort and well-being of building occupants.


For mechanically ventilated buildings, design ventilation systems that result in an air change effectiveness (εac) greater than or equal to 0.9 as determined by ASHRAE 129-1997. For naturally ventilated spaces demonstrate a distribution and laminar flow pattern that involves not less than 90% of the room or zone area in the direction of air flow for at least 95% of hours of occupancy.

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