Resideo ZD16X18TZ Damper 321894-709 Maximum Flow Efficiency: Forged brass

Maximum Flow Efficiency: Forged brass body with full-port openings reduces turbulence and pressure drop in the liquid or suction line

this 025-30891-000 HVAC part provides the exact OEM fit and conductivity required to prevent intermittent power loss and ensure the safe operation of the primary power circuit

This direct HVAC blower relay replacement is designed to handle inductive loads typical of residential blowers

5" mounting footprint makes this a versatile replacement for many OEM configurations

When diagnosing a cracked heat exchanger or assessing soot accumulation

Resideo ZD16X18TZ Damper 321894-709 Maximum Flow Efficiency: Forged brassThe Resideo ZD16X18TZ is a robust 16" Wide X 18" High parallel blade zone damper engineered for precision airflow control in residential and light commercial HVAC zoning applications. Built with a high grade extruded aluminum frame and blades, this unit is designed for long term durability and low leakage performance. The synchronous motor is a 24Vac power closed spring return open actuator, ensuring a fail safe normally open position during power