Features

Rectangular-centrifugal fan, noise reduced design, for direct installation in rectangular duct system. Fan with swing out motor and impeller unit. Casing made from galvanised steel and flanged on both ends, compact design, casing acoustically lined with 50 mm thick mineral fibreboard. Service friendly (cleaning) through swing out motor and impeller unit. Centrifugal, backward curved impeller made of polymer. Dynamically balanced to DIN ISO 1940 Pt.1 for low noise operation. Motor: Totally enclosed, maintenance-free, single phase external rotor motor, by built-in thermal contact through tripping unit, speed control by 5-step speed transformer controller or an electronic controller (stepless), winding with protection against moisture, low noise ball bearing with long-term lubrication, terminal box fitted to flying lead.