Features

Centrifugal fan with 2 speeds to be installed in-line in circular ducting. For medium to smaller air flow volumes against high resistances. Casing made from galvanised sheet steel with spigots to fit standard duct sizes. Backward curved centrifugal impeller made from polymers. Directly fitted on motor and dynamically balanced as a unit providing low noise levels and high efficiency. Totally enclosed single phase external rotor motor, maintenance-free, with thermal contacts, low noise and sealed for life ball bearings. Speed control by use of electronic controller or 5 step transformer controller or 2 speed operation with DS 2/2 (accessories, Ref.no. 1267)