12 Inch EC Duct Fan CF315A-E092E3-01 — 1750 m³/h

The EC Duct Fan adopts an EC external rotor motor combined with a backward-curved centrifugal impeller, which is currently one of the most ideal combinations for duct fans in terms of balancing energy efficiency and performance. This design simultaneously achieves high static pressure, high efficiency, low noise, compact structure, wide-range speed control, and intelligent control under high-resistance duct conditions.

The EC external rotor motor with a directly mounted backward-curved centrifugal impeller eliminates belts, gears, and couplings, achieving virtually zero transmission loss. Overall efficiency = motor efficiency × aerodynamic efficiency. Both are high, so system efficiency is naturally superior. 2. High static pressure + adjustable speed to adapt to duct resistance changes Duct system resistance varies with filter clogging, damper position, and network balancing. EC motors offer stepless speed control, and backward-curved impellers remain highly efficient at high static pressures, enabling: Constant air volume control: automatically increases speed as resistance rises to maintain constant airflow Constant pressure control: maintains stable duct static pressure Demand-based ventilation: reduces speed at low loads for significant energy savings 3. Compact and lightweight, suitable for duct installation The external rotor motor has a short axial length, and the backward-curved centrifugal impeller can be designed in a compact form. The overall unit is small and can be installed directly into round or rectangular ducts, saving installation space. 4. Low noise for improved comfort EC motors are inherently low-noise, and backward-curved impellers provide smooth airflow. The combination results in overall noise levels far lower than AC forward-curved multi-blade fans, making them suitable for noise-sensitive environments such as hospitals, laboratories, data centers, and residential buildings. 5. Intelligent control and system integration EC motors have built-in electronic drives and can easily connect to 0–10V, Modbus, and BMS for remote monitoring, fault alarms, and energy consumption statistics. The self-power-limiting characteristic of the backward-curved impeller prevents the motor from overload and burnout even under abnormal operating conditions. 6. Long service life, low maintenance No carbon brushes, no belts, no mechanical commutation—long bearing life and extremely low maintenance costs. The backward-curved impeller resists dust accumulation, minimizing performance degradation over long-term operation.