The high-efficiency inline duct fan is designed to improve indoor air quality by providing effective ventilation. It functions as both an intake fan to bring in fresh air and an exhaust fan to remove indoor gases, ensuring balanced air circulation. Operating with a powerful 2200 RPM motor and producing less than 30 dB, this fan ensures a quiet yet efficient airflow, making it ideal for various ventilation needs in residential and commercial spaces. Constructed from durable hard plastic, this fan features a sturdy design for long-term use. It has dimensions of 4 in. in duct size and operates at a high 2200 RPM motor speed, providing airflow of 280 CFM. The fan is easy to install with a metal switch ring for secure duct attachment. It is suitable for use in a wide range of environments and operates effectively in both cooling and heating systems. This fan is perfect for grow tents, hydroponic systems, HVAC systems, bathroom ventilation, and more. It ensures improved airflow, enhanced air quality, and quiet operation in various applications, providing users with reliable, long-term air circulation. This product includes a 30-day limited warranty.