Use For the removal of steam and stale air. Working temperature - 20°C + 40°C. Construction Direct-drive. The impeller is made of diecast aluminium and has 5 adjustable blades. Motor The motor is three-phase, 230/400 V, 50 Hz, B5 execution (other frequencies, tensions on demand). Direction of the air Normally supplied with the air flowing from the motor to the impeller (A), for special orders the fans can be supplied with the direction from the impeller to the motor (B).