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30-Day Return & Refund, 2-Year Limited Warranty.[Quiet & Powerful] Mixed flow design combined with a DC motor that powers high-quality impellers makes this fan truly energy efficient than a traditional line fan. With only 20 watts of power but gives a strong airflow up to 208 CFM, very low noise level, only produces 28 dB, this 4” exhaust fan is silent. Lightweight ABS blades reduce the airflow resistance, add airflow by 30%
[Reliability and Durability] High-quality 4-inch duct fans typically use durable materials and advanced manufacturing processes to ensure long-term stable operation and minimal maintenance requirements
[Easy Installation] 4-inch duct fans are designed for easy installation and maintenance,mixed flow inline duct fan’s blade and the body are made of high quality plastic. Quick removal and easy maintenance
[Versatility] Designed for air circulation boosting of cooling and heating systems and air-circulation. The 4 Inch Inline duct fan is a great option for grow tents, closet, storage rooms, kitchens, bathrooms, basements, offices, shops, and residences
[5-Speed Airflow Adjustmen] The CloudStorm S4 is equipped with a simple and intuitive 5-speed controller, making it easy to use with fast response and strong durability.
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