Airflow tab on Vents Dialog.
Enter the discharge coefficient for this vent component. The velocity of the air moving through the vent is given by the standard orifice equation:
Where:
v: Velocity
Cd: Discharge coefficient
P: Pressure either side of the vent
ρ density of the air going through the opening
You can select this vent from the Openings model data.
Note: The discharge coefficient is only used in thermal simulations when the Natural ventilation Model option is set to Calculated.