Resideo ZD18X20TZ Damper

The Resideo ZD18X20TZ is a heavy-duty rectangular parallel blade zone damper designed for precision airflow control in residential and light commercial forced-air systems. Built with a robust extruded aluminum frame and blades, this 18-inch by 20-inch unit features riveted and screwed corners for maximum structural integrity. The parallel blade design, combined with high-quality extruded blade seals, ensures low-leakage performance and quieter operation compared to standard dampers. It utilizes a 24Vac synchronous motor with a power-closed/spring-return-open configuration, providing a fail-safe "normally open" position in the event of power loss. Designed for seamless integration with Honeywell TrueZONE and other electronic zoning panels, the motor is conveniently mounted on the 20-inch side. Technicians will appreciate the mechanical visual position indicator and adjustable range stops, which simplify onsite commissioning and airflow balancing. This two-position zone damper is an essential component for maintaining static pressure and comfort across multiple zones.

• Fail-Safe Operation: Spring-return motor ensures the damper defaults to open during power failures to maintain airflow.
• Durability: Constructed from corrosion-resistant extruded aluminum with reinforced riveted corners for long-term reliability.
• Precision Control: Features adjustable range stops and a mechanical position indicator for accurate manual overrides and balancing.
• Low Leakage: Tight-sealing parallel blades minimize air bypass, increasing the overall efficiency of the HVAC zoning system.
• Easy Installation: Simple two-wire motor connection and flexible mounting orientations make it compatible with most ductwork layouts.

Common Questions

Is this damper compatible with non-Resideo zoning panels?
Yes, as long as the zoning system provides a standard 24Vac signal, this power-closed damper can be integrated, though it is optimized for Honeywell Home TrueZONE panels.

Can the actuator be moved to the 18-inch side?
No, the ZD18X20TZ is specifically engineered with the synchronous motor mounted on the 20-inch dimension. For motor mounting on the 18-inch side, a ZD20X18 series would be required.

What is the failure mode of this unit?
This is a normally open damper. In the absence of 24V power, the internal spring mechanism will pull the blades to the fully open position.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.