Zonefirst ZDB-12X12 12HX12W Parallel 24V 2-Pos S/R R-410A offering improved heat resistance and

offering improved heat resistance and consistent voltage generation

The potted enclosure offers superior protection against extreme vibration and moisture

Technicians should note that this standard model provides optimal clearance in most boiler shells

Using a multi-turn potentiometer

Built with a rugged brass body for long-term reliability in demanding commercial and residential environments

Zonefirst ZDB-12X12 12HX12W Parallel 24V 2-Pos S/R R-410A offering improved heat resistance andThe Zonefirst ZDB 12X12 is a professional grade 12x12 zone damper engineered for robust airflow management in residential and light commercial HVACR systems. Built with a heavy duty extruded aluminum frame and 3 inch parallel blades, this bottom mount zone damper features a 24V spring return motor that ensures fail safe operation by defaulting to the open position during power loss. The low voltage HVAC actuator utilizes a synchronous hysteresis