External body in high density structure plastic material and particularly resistant against the atmospheric agents corrosion action. Motor with backward-curved radial impeller built in the stator. “LONG LIFE” ball bearings and thermal protection on single-phase models. Galvanized steel protection grille. For continuous operation in environments with max temperature 40°C. 2 speed models can be controlled by a three-phase switch (Δ λ), not supplied as an accessory, but easy to find on sale. ACCESSORIES:Phase slicing speed regulator for monophase motors. Protection grille (extraction side) supplied as an accessory. Counter-basement. Backdraught gravity shutter.
