Heko centrifugal fan series is with forward curved and backward curved impeller.
Both of forward curved and backward curved impellers are with AC and DC input.
Diameter of forward curved impeller: 108mm, 120mm, 133mm, 140mm, 160mm and 180mm.
Diameter of backward curved impeller: 133mm, 175mm, 190mm, 220mm, 225mm, 250mm, 280mm, 310mm, 355mm and 400mm.
All size centrifugal fans are motorized by 3-core ec brushless external rotor motor.