ventilation fan:
QBT 1250
Diameter blades (mm):1250
Automatic rotational speed: 439
Air-compressor rotational speed  (r/min):1400
Wind capacity: 44000
Whole pressure(Pa): 56
Noisedecibels:  <=70
Imports power (W): 1100
Rated voltage (V): 380
Specification(mm): 1400*1400*400

High efficiency and low wastage of energy ；Safety and convenient ，Better efficiency of anti-corrosivity ；Invariable running and low noise ；Steady performance and large airflow；Centrifugal system help open and close freely；Meeting the needs of ventilation in various place