- Base manufactured from galvanised sheet steel.
- High efficiency centrifugal backward curved impeller manufactured from high strength black injection moulded plastic (225 and 250) or from aluminium sheet (from 280 to 355).
- External rotor motor
- Cowl manufactured from spun aluminium.
- On-Off isolator switch
Available, depending on the model, in 2, 4 o 6 poles.
Motors
- Single-phase external rotor motor 230V-50/60Hz (CRVB-N),IP54, class F, with safety thermal overload protection.
Speed controllable by voltage.
- Three-phase external rotor motor 230/400V- 50/60Hz (CRVT-N), IP54, class F, with safety thermal overload protection.
Speed controllable by frequency inverter and by voltage.
