• Pickled and phosphated steel housing with polyester powder-coated finish, resistant against aggressive atmospheric agents. • Nominal diameter: 125 mm • High efficiency ES (brushless) motor coupled to a backward impeller. • Possibility of connection to remote sensors. • Zinc-coated steel brackets for wall mounting, supplied as standard. • A dedicated dip-switch allows to choice: o 2 speed product functioning, settable during the installation and adjustable through optional two-speed switch, o 1 speed product functioning, adjustable through 0-10V signal potentiometer (supplied as optional).