Honeywell ARD18TZ Damper

The Honeywell ARD18TZ is an 18-inch round automatic bypass damper designed for precision airflow control in multi-zone residential and light commercial forced-air systems. This 24V spring-return damper operates as a power-closed, spring-open component, ensuring failsafe ventilation or bypass bypass performance. Constructed with heavy-duty galvanized steel, the ARD18TZ features a reinforced drive blade backed by synthetic bearings for quiet operation and long-term reliability in high-velocity HVAC ducts. It serves as a direct professional replacement for the Honeywell RDS-18. The synchronous motor provides consistent torque for positive seal closure, reducing air leakage and improving overall system static pressure management. For contractors, the adjustable range stops allow for fine-tuning of the blade positioning, making it a versatile Zoning Damper for balancing airflow. Properly integrating this Honeywell zone damper into an EIM or zone control panel ensures optimized comfort and equipment efficiency across all thermal zones.

Key Technical Benefits

• Direct Replacement: Seamlessly replaces the Honeywell RDS-18 18-inch round damper models.
• Spring-Return Actuator: Features a 24V motor that provides a fail-safe open position during power loss.
• High Seal Integrity: Engineered with a specialized blade seal to minimize bypass leakage when the HVAC zone damper is closed.
• Durable Construction: Built with heavy-gauge galvanized steel to withstand high-static pressure environments.
• Adjustable Range Stops: Allows technicians to manually set the maximum opening or closing position for precise airflow control.

Common Installation Questions

How do I wire the Honeywell ARD18TZ to a zone panel?
The unit requires a 24VAC power source. Connect the motor leads to the corresponding M1 and M6 terminals on your zone control board; the motor drives the damper closed, and the internal spring returns it to the open position once power is removed.

Can the actuator be replaced without removing the entire damper?
Yes, the synchronous motor is field-replaceable, allowing for faster servicing without cutting into the existing 18-inch round ductwork.

Is this damper suitable for use as a fresh air intake?
While primarily used for zoning, its spring-open configuration makes it effective for applications where a default open state is required for ventilation or combustion air intake.

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.