EC Ø 280 mm Backward-Curved Centrifugal Fan
The EC Ø 280 mm Backward-Curved Centrifugal Fan is a high-performance motorized impeller designed for air handling units, precision cooling systems, and commercial ventilation equipment requiring high volumetric airflow and superior static pressure generation. Featuring an integrated electronically commutated (EC) brushless motor with built-in drive electronics, it delivers IE4/IE5 efficiency levels and reduces operational power consumption significantly compared to standard AC blowers.
Supporting 0-10V DC, PWM, and Modbus RTU serial communication, the unit allows seamless stepless speed modulation to dynamically match fluctuating system demand. Its precision-engineered backward-curved impeller, dynamically balanced rotating assembly, and maintenance-free heavy-duty ball bearings ensure whisper-quiet acoustics and dependable continuous duty across demanding HVAC configurations.
Key Features
- IE4 / IE5 Motor Efficiency: Integrated brushless permanent-magnet motor delivering over 85% electrical efficiency
- Optimized Ø 280 mm Profile: Engineered for medium-to-large air handlers requiring robust pressure output across dense filter lines
- Backward-Curved Impeller: High-efficiency aluminum or composite wheel minimizing dirt accumulation and aerodynamic losses
- Stepless Speed Modulation: Continuously controllable via 0-10V DC, PWM signals, or Modbus RS485 communication
- Precision Dynamic Balancing: Balanced to ISO 1940 G2.5 standards for ultra-quiet operation and minimal mechanical vibration
- Integrated Safety Protections: Built-in safeguards against thermal overload, locked rotor, overvoltage, and phase deficiency
Application Fields
- Air handling units (AHUs), hygienic HVAC units, and modular Fan-Wall / Fan-Array configurations
- High-capacity heat recovery ventilation units (HRV / ERV) and false-ceiling plant systems
- Data center server rooms, telecom facilities, and computer room air handlers (CRAC / CRAH)
- Acoustically insulated rectangular and circular in-line duct booster boxes
- Cleanroom Fan Filter Units (FFU), laminar flow clean benches, and industrial air filtration modules
