【Easy to Install】Plastic duct fan is lighter than steel. Removable duct ends with locking tabs for quick removal and easy maintenance. 【Features】Hon&Guan duct fans are corrosion resistant, durable plastic housing, ideal for long duct runs, and suitable for air temperatures from -4°F to 140°F. 【Application Scenarios】Designed to quietly ventilate grow tents, transfer heating/cooling to rooms, circulate fresh air, cool AV closets, exhaust odors. 【Powerful and Silent】Durable plastic fan housing and blades for extremely low noise. Quickly and efficiently move vast amount of air. 【Long life】Long life ball bearing motor (up to 50,000hours) with thermal overload protection. Using Mixed Flow Inline Duct Fans to Increase HVAC Circulation If the heating and cooling in your home is uneven and hard to regulate, Hon&Guan fans may help. Hon&Guan mixed flow inline fans are compact, lightweight but powerful and quiet, which can be used to solve many air moving problems. They are capable of moving airflow through long or complex duct runs, and provide an ideal solution for areas that are hard to heat or cool. Hon&Guan fans feature a durable UV resistant plastic housing, IPX2 wateproof connection box and a two speed motor. That means they can operate in damp environment without causing a short circuit.Japanese band NMB ball bearing was adopted in outer roter motor for long working life up to 50000 hours. They are available in 4 inches, 5 inches, 6 inches and 8 inches duct diameters. Please make sure to order the right size that fits your duct! Their high-performance and stability makes them extremely useful for residential and lightcommercial ventilation applications. Residential applications: Bathroom exhaust, whole house ventilation, duct boosting, general kitchen exhaust, laundry room exhaust, basement bosting, etc. Commercial applications: Conference rooms, machine rooms, hair and nail salons, hotels, caffe shops, warehouse gyms,etc. Please note: No plug- the duct fan come with 220V power cord. Specifications: LS-Low Speed, HS-High Speed Voltage: 220V-240 Frequency: 50Hz Current: 0.22A for LS and 0.24A for HS Power: 28W for LS and 30W for HS Speed: 1850rpm for LS and 2200rpm for HS Air Flow: 165 m³/h for LS and 198m³/h for HS Air pressure: 131Pa for LS and 156Pa for HS Noise Level: 26dB for LS and 31dB for HS Package includes: 1 X Duct fan with cable 1 X Instrution 4 X Screws