INLINE FANS SUITABLE FOR INSTALLING IN ANY POSITION IN VERTICAL AND HORIZONTAL DUCTS. THE CASING SHOULD BE DOUBLE SKIN, INTERNALLY ACCOUSTICALLY LINED AND CONSTRUCTED OF GALVANISED STEEL. THE FAN SHOULD BE DIDW WITH FORWARD CURVE IMPELLER FITTED WITH MAINTENANCE FREE EXTERNAL ROTTER MOTOR. THE MOTOR SHALL BE COMPLETED FOR 220+-10% VOLT SINGLE PHASE 50 CYCLES AC SUPPLY. ALL UNIT SHALL BE COMPLETE WITH DUCT FLEXIBLE CONNECTOR AND VOLUMN CONTROL DAMPER. THE FAN HAVE LOW SOUND LEVELNOT EXCEEDING MORE THAN 45 DBA AT THREE METER DISTANCE. 900 CFM, 10 MM WC STATIC PRESSURE