Operating at 3450 RPM

preventing unauthorized temperature overrides

it maintains system integrity by ensuring correct low-voltage thermostat wiring and streamlined interface performance

High Millivolt Output: Generates a consistent 25-35 mV range

Resideo ZD20X12TZ Damper 326058-758 Operating at 3450 RPMThe Resideo ZD20X12TZ (also identified as ZD20X12TZ U) is a heavy duty 20x12 rectangular zone damper engineered for tight airflow management in forced air systems. This parallel blade zone damper utilizes a 24Vac synchronous motor mounted on the 12 inch side, delivering high torque for reliable operation. Designed as a power closed spring return open assembly, it ensures the duct remains open during power loss or system standby, maintaining critical