In-line centrifugal duct fans suitable for wide range of general residential, commercial and industrial exhaust or supply ventilation applications. Description Circular in-line duct fans from 100 to 400 mm diameter. Models are suitable for mounting in any orientation and operation within ambient air temperatures between -20ºC up to +40ºC. Comprehensive range of accessories to ease the installation and control the fan performances. Construction Fan casing manufactured from high-grade corrosion-resistant pressed galvanized steel, with black polyester paint coating. Fully airtight sealed assembly. Direct drive centrifugal impeller. Brushless EC motor, with thermal overload protection, suitable for single phase supply 230V +/- 15%/50-60Hz. Fan speed adjustable with the potentiometer placed in the connection box or with an external control type REB-ECOWATT. Analogue input with terminals in the terminal box to control the fan with 0-10V input signal. Marca [MARCA].