The CK is an in-line centrifugal duct fan with high capacity and excellent reliability. The straight through radial fan is compact and very easy to install. It can cope with high pressure and long duct runs, whilst still operating at acceptable sound levels. The CK range of fans have casings manufactured from galvanized steel and are moisture resistant. They are approved for installation in humid or damp environments being rated IP44 when installed in a duct system. The fan speed can be controlled by voltage variation regulators. Several fans can be connected to the same controller providing the total rating of the controller is not exceeded. The motors are an external rotor type asynchrony motor. They have maintenance free sealed ball bearings and are protected from over heating by thermo contacts. * European engineered * Low profile housing for ultra quiet operation & easy installation in tight spaces * Guide plates to streamline airflow * Sturdy galvanized steel * Universal mounting bracket included * 5 foot grounded preinstalled power cord * Energy Star rated * UL listed * 5 years warranty