Zonefirst AOBD-20X12 Damper

The Zonefirst AOBD-20X12 is a professional-grade automatic opposed blade damper designed for precision airflow control in commercial and residential HVAC systems. Measuring 20" wide by 12" high, this rigid extruded aluminum damper utilizes an opposed blade configuration to minimize turbulence and provide a linear flow characteristic essential for balanced zoning system applications. The unit is equipped with a high-torque 24Vac power open/power closed actuator, ensuring reliable performance under high static pressure conditions. Integrated built-in end switches allow for seamless feedback to the zone control panel or auxiliary equipment, confirming blade position before initiating heating or cooling cycles. This HVAC motorized damper features a side-mounted motor on the 12" dimension, facilitating installation in tight plenum spaces. Engineered for durability, the AOBD series eliminates the flutter often associated with parallel blade designs, making it a preferred choice for contractors requiring low-leakage air control and long-term mechanical reliability.

• Opposed blade design ensures balanced air distribution and reduces mechanical stress on the ductwork.
• Robust 24Vac synchronous motor provides consistent torque for positive seal closure and opening.
• Integrated end switches provide dry contact closure to signal equipment or verify damper status.
• Heavy-duty extruded aluminum construction offers superior corrosion resistance compared to standard galvanized steel.
• Side-mount actuator configuration optimizes footprint for rectangular duct installations.

Can this damper be used with any 24V zone control system?
Yes, the AOBD-20X12 is compatible with most three-wire zone control panels that support power open and power closed logic.

What is the benefit of an opposed blade over a parallel blade?
An opposed blade damper directs air more evenly across the duct, preventing the air from being deflected to one side, which improves mixing and reduces noise.

Does this unit require a transformer?
This unit operates on 24V AC power; ensure your control circuit or dedicated transformer has sufficient VA capacity to drive the actuator.

This item is not eligible for free shipping.

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.