QWORK 4 Inch Inline Duct Fan, 280 CFM Quiet Exhaust Ventilation Fan, High Efficiency 2200 RPM Air Booster Tool for Bathroom, Kitchen, Grow Tent, Hydroponics, HVAC Vent Exhaust and Intake

Powerful & Energy Efficient: Boost airflow up to 280 CFM with a high-speed 2200 RPM motor for faster ventilation. | Ultra Quiet Operation: Operating under 30 dB, this 4-inch inline fan ensures efficient exhaust and intake performance without loud noise. | Dual Function Ventilation: Works as both an intake fan to pull in fresh air and an **exhaust fan** to remove warm or contaminated air, balancing humidity and optimizing air quality in enclosed spaces. | Easy to Install: Made with ABS plastic and a reinforced structure to ensure long-term stability. Comes with a secure metal ring and clear instructions, allowing quick connection to standard 4-inch ducts. | Versatile Application & Reliable Support: Ideal for HVAC systems, bathrooms, kitchens, hydroponic grow rooms, greenhouses, 3D printers, and other ventilation setups.