SB 250 C – SilentBox Centrifugal Fan – Helios Very quiet fans in an acoustic casing ideal for ventilating noise sensitive areas achieving good volumes at high pressures. A fully speed controllable centrifugal fan range suitable for indoor use terminal box rated IP55 (weatherproof) with a pre-galvanised steel casing. With circular spigots for connecting to ducting using pipe clamps. Super quiet and powerful centrifugal fan for use with 125 mm dia ducting. 2 speed options available. Easy access to motor and impeller. High performance up to 132 l/s and 102l/s. 1 Year no quibble warranty. Quality assured by the manufacturer ISO9001. Product PDF: Helios SP Range
