Helios Duct Fan SilentBox, 1 PH SB 125 A

Radial in-line fan with sound-attenuated casing. Sound-insulating casing made of galvanized sheet steel with round spigots, designed for standard ducts. Sound-absorbing perforated sheet metal inner lining, backed with 50mm thick mineral fiber board. Removable cover. Fan compartment and scroll casing freely accessible. Motor and impeller can be swung out. High-performance drum impeller with forward-curved blades made of galvanized sheet steel. Vibration-free operation due to dynamic balancing according to quality level G 6.3 VDI 2060 and DIN ISO 1940. Single-phase AC external rotor motor, enclosed design, maintenance-free, speed controllable by voltage reduction, built-in thermocontacts, sealed, low-noise ball bearings with long-term lubrication.