Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The Design Specification Outdoor Air object is intended to model mechanical ventilation. Depending on your HVAC system, the actually ventilation rate may be changed by several things including the economizer and zone diffusers if using VAV terminals.
With your approach, model ventilation rates by adjusting the infiltration rates and schedule instead. If you want to model natural ventilation at a higher level of fidelity, use the Add Wind and Stack Open Area measure on BCL.
