Openings tab in model data under Vents
On surfaces where no custom openings have been defined, you can create vents simply by checking the Auto generate options under the External and Internal Vents headers. In this case vents are positioned on each surface using Vent spacing and Vent height above floor in the automatically generated facade layout. Typically, a single vent is positioned under each of the windows (if the vent spacing is the same as the window spacing).
Note: It is often more convenient to place vents manually by drawing them at surface level or by copying previously drawn vents at building level.
Enter the area of the area of each vent (in m2 or ft2).
The spacing between the each vent on the facade (in m or ft). In many cases this will be the same as the window spacing if auto generated windows are also being used. The window spacing is the centre to centre spacing between vents, not the gap between vents.
The height of the vent centre above the zone floor level (in m or ft).