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

[Quiet & Efficient Airflow] This 4-inch inline duct fan provides powerful airflow up to 183 CFM while operating as quietly as 24 dB. Featuring stepless speed control, it enables precise adjustment for optimal performance and noise balance. Excellent for quickly removing bathroom humidity, grow tent odors, and stale attic air. Includes a 5 ft power cord for quick and simple installation. [Pure Copper DC Motor & High-Efficiency Airflow] Featuring a 100% 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 consumption make this inline exhaust fan durable and reliable for demanding applications. [Durable, Safe & Versatile Use] Constructed 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. Suitable for quietly ventilating grow rooms, bathrooms, kitchens, attics, basements, and workshopsimproving airflow and comfort effortlessly. [Easy Installation & Multi-Scene Ventilation] This 4-inch inline duct fan can be easily mounted on walls, windows, or ceilings with straightforward installation. Compact yet powerful, it is ideal for use with 3D printers, laser engravers, fog machines, kitchen cabinets, fireplace vents, bathroom ceilings, garages, greenhouses, and RV ventilation. With a 3.86-inch fan size that perfectly fits standard 4-inch ducts, it efficiently removes heat, moisture, and odors to keep the air fresh and well-circulated. (Note: Duct not included.)