Zonefirst AOBD-20X8 Damper Freon and equipment model number before

and equipment model number before installation

Simplified Installation: Features a standard 2-bolt flange design

this retainer supports the necessary tension for accurate pneumatic valve actuator positioning

utilizing genuine Spence replacement parts is essential to maintain the calibration accuracy of the D-Pilot

Zonefirst AOBD-20X8 Damper Freon and equipment model number beforeThe Zonefirst AOBD 20X8 is a high performance automatic opposed blade damper designed for precision airflow management in commercial and residential HVAC zoning. This 20" x 8" unit features a robust 24Vac power open power closed actuator, requiring a 3 wire connection for positive drive control in both directions. Unlike standard gravity or spring return models, the AOBD 20X8 side mount damper utilizes a synchronous motor that draws power only during