**NON FUNCTIONAL** ONVEAN 4 Inch Inline Duct Fan with Speed Controller, Upgraded Inline Fans High-Efficiency Exhaust Duct Fan, Low Noise HVAC Ventilation in Basement Bathroom Workshop Attic Grow Tent

Additional Details from the Manufacturer

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More features

• [Ultra-Quiet Inline Fan]:This 4-inch inline duct fan delivers up to 183 CFM of powerful airflow while maintaining ultra-quiet operation at only 22 dB. Equipped with stepless speed control, it lets you precisely balance performance and noise for any environment. Ideal for grow tents, bathrooms, kitchens, and attics—quickly removes humidity, odors, and stale air.
• [Pure Copper DC Motor & High-Efficiency Airflow]:Featuring a pure copper DC motor, this inline duct fan spins at 5000RPM with <20K temperature rise. Compared to aluminum motors, its 30% better heat dissipation and 50% lower energy use make this inline exhaust fan durable and reliable for heavy-duty needs.
• [Durable, Safe & Versatile Use]:Built with sturdy ABS housing and PBT blades, this 4-inch inline duct fan is waterproof (IPX4), durable, and resistant to deformation. Equipped with a wide-voltage power adapter, low-voltage safety system, and stall plus overheat protection, it ensures stable and secure performance. Ideal for quietly ventilating grow rooms, bathrooms, kitchens, attics, basements, and workshops—enhancing airflow and comfort effortlessly.
• [Easy Installation & Versatile Use Duct Fan]:This 4 inch inline fan installs quickly on walls, windows, or ceilings. Perfect for bathrooms, grow tents, attics, garages, workshops,dog house，hen house,camping tent,laser engraving,and laundry rooms, it fits standard 4-inch ducts like a duct booster fan.
• [High Quality & 24/7 Support Inline Fan]Tested to strict standards, this 4 inline fan includes a 2-year warranty and 24/7 customer service. No need to return—contact us for any issues!