Zone exhaust are placed at the HVAC zone level and are used to extract air to outside. To place an extract, click on the Add zone exhaust fan tool and then making sure that the cursor is inside the boundary of the zone just click the mouse button to place the extract. The exhaust fan will be automatically positioned at the top right of the HVAC zone:
Note: A zone exhaust fan can be added in addition an extract in an HVAC Zone if an ADU has been placed. Alternatively it can included without an ADU and extract.
Data for the zone exhaust fan data can be entered on the Zone exhaust fan dialog. It is not to be confused with the Zone extract which is used to return air back to the AHU.