Increased ventilation | U.S. Green Building Council
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LEED O+M: Existing Buildings | v2 - LEED 2.0

Increased ventilation

EQc2 | Possible 1 point


Provide additional outdoor air ventilation to improve indoor air quality for improved occupant comfort, well-being and productivity.


Option A

For Mechanically Ventilated Spaces:

  • Increase outdoor air ventilation rates to all occupied spaces by at least 30% above the minimum required by ASHRAE 62.1-2004.
Option B

For Naturally Ventilated Spaces:

  • Design natural ventilation systems for occupied spaces to meet the recommendations set forth in the “Good Practice Guide 237: Natural ventilation in non-domestic buildings” (1998). Determine that natural ventilation is an effective strategy for the project by following the flow diagram process shown in Figure 2.8 of the CIBSE Applications Manual 10: 2005, “Natural ventilation in non-domestic buildings.”

  • Use diagrams and calculations to show that the design of the natural ventilation systems meets the recommendations set forth in the CIBSE Applications Manual 10: 2005, “Natural ventilation in nondomestic buildings.”
  • OR

  • Use a macroscopic, multi-zone, analytic model to predict that room-by-room airflows will effectively naturally ventilate at least 90% of occupied spaces.
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