- Casing made of galvanized steel sheet, with connecting flanges for standard-sized ducts.
- Single-, or three-phase extrnal rotor motors, with IP44 grade ingress protection, and class F or B insulation, featuring internal thermal protection.
- All motors suitable for speed control.
- Backward curved impellers for models 4×2, 5×25 and 5×3.
- Forward curved impellers for models 6×3, 6×35 and 7×4.
- All electric connections in a box, made out of self-extinguishing techno-polymer, with IP55 protection, placed outside the casing.
- Speed regulators
- Flexible noise-cancelling connectors