iPower GLFANXINLINE4 4 Inch 190 CFM Inline Duct Ventilation Fan HVAC Exhaust Blower for Grow Tent, Grounded Power Cord 190 CFM; Noise Level: &lt;48dB; 110/120V standard household plug; Pre-wired 5 Feet power cord (UL Listed) Quality UL components for quiet operation. Composite fan blades and center hub which reduces noise and vibration Durable ceramic-coated. Permanently lubricated bearing that requires zero maintenance. Remove heat from the system to solves air delivery problems without major system rework or expense. Suitable for industrial, household and horticulture ventilation applications for air clean and temperature control Max Ambient Temperature: 176/ 80; Warranty: 12 months