Helios Duct Fan SilentBox, 1 PH SB 200 C

Radial inline fan with sound-attenuated casing. Sound-insulating casing made of galvanized steel sheet with round connecting spigots adapted for standard pipes. Sound-absorbing perforated sheet metal inner lining, backed with 50mm thick mineral fiber board. Removable cover. Fan compartment freely accessible. Motor and impeller can be swiveled out. High-performance radial impeller with backward-curved blades made of plastic. 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, closed design, maintenance-free, speed controllable by voltage reduction, integrated thermal contacts, sealed, low-noise ball bearings with long-term lubrication.