Super Silent Duct Fan

Super Silent Duct Fan, Blower Fan
Size (inch): 4 inch, 6 inch, 8 inch
Size (mm): 100mm, 150mm, 200mm

Made of eco-friendly material, 
High-quality bearing system, more than 50,000 hours life-time. 
Optimal airflow and air pressure, energy saving
Build-in noise-canceling material, silent operation compared to other fans on the market
Double diameter connection, sealing-up, leak-proof and shockproof. 
Optional timer delay, humidity sensor, temperature sensor or other functions
Operating temperature range: -20℃~60℃.
IP44 protection class