- Axial Flow Wall / Window Type Fans - Directly Coupled Motor. - Single Flanged Ducting Drum - Rigid Construction In Sheet Metal. - Air Flowrate : 2.750 - 18.000 m�³/h (Min. - Max.) - Smoke exhaust, suction of dusty and wet air in the foundries, cement factories, paper factories and joinery works, building ventilation and for heater and refrigerators.