1.For Flue Diameter 40W 9-13cm/60W 9-17cm.The Input Voltage is 220v, ( 110V-120V voltage, we will be equipped with a voltage converter).the chimney induced draft fan is used by leaving two wire ends to connect to the power source. 2.This Type of Induced Draft Fan is Used on Household Chimneys /Fireplace , and the Outlet Temperature Should Not Exceed 80 Degrees. The Induced Draft Fan Should Be More Than 6 Meters Away from the Fire Source.Otherwise the Induced Draft Fan Will Be Burnt. 3.This Chimney Fan very suitable for chimney accessories. The chimney induced draft fan generates suction and induces the rapid discharge of smoke to prevent the smoke from being unable to exit the flue smoothly due to the poor chimney. Not only will the smoke be discharged quickly, but it also has excellent performance. 4.Easy to Install, Very Silent, Suitable for Most Forms of Chimneys, Installation Does Not Require Professional Technicians. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.