Zonefirst AOBD-18X8 Damper

The Zonefirst AOBD-18X8 is a professional-grade automatic opposed blade damper designed for rigorous residential and commercial HVAC zone control applications. Featuring an 18-inch width by 8-inch height side-mount configuration, this unit is engineered with an extruded anodized aluminum frame and blades to resist corrosion while maintaining a slim profile. The integrated 24Vac power open/power closed actuator ensures positive airflow shutoff and modulating precision, operating with a 30-second cycle time. Built-in end switches provide critical feedback to the zoning control panel, allowing for seamless integration with secondary equipment like blowers or auxiliary heaters. The opposed blade design minimizes turbulence and static pressure drops compared to standard parallel blades, ensuring optimal airflow management and system longevity. This Zonefirst damper is an industry standard for contractors requiring reliable, self-contained motorized air control. It installs easily into rectangular ductwork by cutting a 3-inch slot, secured via the integrated end plate for a stable, leak-resistant fit.

• Precision Airflow Control: Opposed blade geometry provides linear flow characteristics and superior sealing compared to single-blade models.
• Integrated Feedback: Built-in end switches allow for equipment interlocking, ensuring the system only energizes when the damper has reached its terminal position.
• Energy Efficient Actuation: The 24V motor is only powered during the 30-second travel period, reducing parasitic electrical load on the transformer.
• Durable Construction: Stainless steel drawbars and nickel-plated linkages provide heavy-duty resistance against mechanical wear in high-cycle environments.
• Low Profile Installation: The side-mount actuator design allows for installation in tight clearance areas within HVAC ducting.

Does this damper require a specific brand of zone control panel?
While optimized for Zonefirst systems, the 3-wire 24Vac power open/power closed motor is compatible with most standard zoning panels and SPDT switches.

Can I install this in a vertical duct?
Yes, the AOBD series is versatile; however, as a side-mount model, the motor and end plate are positioned on the 8-inch dimension, which is ideal for horizontal duct side-entry.

What happens during a power failure?
Because this utilizes a power open/power closed actuator rather than a spring return, the blades will remain in their last position if 24V power is lost.

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.