IO HVAC Controls MD-12 12" 3-Wire Damper

The IO HVAC Controls MD-12 3-Wire Damper is an electrically actuated airflow control part with a 12-inch round conduit size rating and a three-wire connection interface for power and control signaling. It operates using a motorized actuator that positions its blade between open and closed states to regulate air passage through ductwork in HVAC systems. It matches standard pipe sections for inline assembly, while the electrical configuration allows integration with thermostats or zone controllers positioned within supply or return air pathways. The system adjusts airflow volume for controlled distribution, zoning and balancing of conditioned air across connected duct branches.