General ventilation: house , conference room ,kitchen room , dryer booster,hydroponic room and ductboosting. Appliance:-General ventilation: House ,conference room-Kitchen exhaust: range hood-Bathroom exhaust, dryer booster-Hydroponic growing- Duct boosting Feature:-Plastic housing and steel impeller-100% speed controllable- Aerodynamic design-Ouer rotor motor inline fan