iPower 4 Inch 154 CFM Inline Duct Ventilation Fan with Variable Speed Controller HVAC Exhaust Blower for Grow Tent, Gray

Conditions of operation 1. The installation must be performed by professionals. 2. Please check all the fastening parts to make sure theres NO any looseness existing. 3. Please check to make sure theres NO any sundries with the motor fan, which may cause the fan damages and personal injury. 4. Please check the nameplate, wiring diagram and specification data of the fan to make sure the fan meets your application requirements before installation. 5. Please check to make sure theres NO clamping stagnation with the fan before installation. 6. Please check the rotation direction of the fan to make sure its running in the correct direction. 7. Any reaching into the fan blade area is forbidden when the fan is running. 8. During maintenance the power supply must be cut off to ensure the safety of people and property. 9. Please avoid collision force and getting wet during the transit. Please check and maintain the fan periodically to last its service life. Warning: 1. Can not be used in coal mine wells which have methane mixed gas and coal dust explosion hazard. 2. Avoid impact or physical damage of the unit as it will cause premature failure. Should be stored at and used for those places where have no strong impact force and shock. 3. Can not be used for those places where corrosive gas or steam exist. 4. No waveform and current input allowed which may cause damage on motor enameled wire and shorten its service life. 5. Stay away from children. 6. Repairs and Maintenance Notes: (1) Keep fan in a dry environment (2) Do not use water or any other liquid cleaning agent, use only a clean brush or a clean dry cloth to wipe away any loose dirt or dust. (3) Under normal operating conditions, the fan should be cleaned every six months.