A terminal unit for a HVAC system, including: a housing including a first chamber configured to receive a first air flow and a second chamber configured to receive a second air flow; an internal wall disposed within the housing and extending between the first chamber and the second chamber, wherein the internal wall includes an opening formed therein; a damper door rotatable relative to the opening, wherein the damper door is configured to occlude the opening in a closed position; and an electromagnet that is configured to be selectively activated to generate a magnetic field to retain the damper door in the closed position and thereby prevent the first air flow from flowing through the opening; wherein when the electromagnet is deactivated, the magnetic field is not generated such that the second air flow may be forced from the second chamber to the first chamber through the opening.