The Zonefirst RDS-10 is a heavy-duty 10-inch round HVAC zone damper engineered for reliable airflow management in residential and light commercial systems. Built with a 22-gauge galvanized steel spiral-formed shell, this damper features a single-blade design equipped with a high-integrity neoprene gasket to ensure a low-leakage seal when closed. As a two-wire spring return damper, it utilizes a 24Vac motor that draws approximately 8 Watts during the powered cycle. The default configuration is power-closed/spring-open, serving as a fail-safe to maintain airflow if power is lost, though it remains field-convertible for applications requiring power-open operation. For the service technician, the RDS-10 offers high torque (up to 17.70 in/lbs) to overcome duct pressure up to 1.0" W.C. and includes an adjustable minimum position stop to prevent total airflow cutoff where required. Its compact motor footprint and 24V motor actuator make it a versatile choice for retrofit or new installs involving HVAC zoning systems. Integration is straightforward via standard screwless terminals, allowing for rapid landing of wires from any compatible zone control panel. Key Benefits Fail-Safe Operation: Spring return mechanism ensures the damper reverts to the open position during power loss, preventing equipment freeze-ups. Superior Sealing: Professional-grade neoprene gasket minimizes air bypass for maximum system efficiency and precise temperature control. Durable Construction: 22-gauge galvanized steel housing resists corrosion and provides structural rigidity in high-velocity ductwork. Technical Flexibility: Field-reversible motor and adjustable minimum/maximum stops allow for custom airflow balancing. Ease of Installation: Simple two-wire 24V connection and spiral-formed duct compatibility reduce labor time on the job site. Common Questions Is the RDS-10 compatible with 3-wire zone panels? This is a 2-wire spring return model. While it can be used with many panels, ensure your controller supports two-wire power-close/spring-return logic or use the appropriate relay for compatibility. Can I adjust the damper so it doesn't close 100%? Yes, the actuator includes an adjustable cam/set-screw that allows you to set a minimum opening to maintain a bleed-through of air for ventilation or pressure relief. What happens if the motor fails? Due to the spring-return design, the internal clock spring will pull the blade back to its "home" position (typically open), ensuring the zone continues to receive air until the motor is replaced. 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.
