【PROGRAMMABLE INLINE FAN】Mixed flow design combined with a EC motor ensures true energy efficiency, with only 40 watts of power but gives a strong airflow of up to 205 CFM, a very low noise level, and only produces 28DB, this 4” exhaust fan is silent. Lightweight ABS blades reduce the airflow resistance and add airflow by 40%. The smart controller has multiple modes for operation, 10 speeds, is easy to program, and controls the humidity and temperature automatically

【 HIGH-PERFORMANCE CARBON FILTER】Constructed of the heavy-duty metal filter housing and stainless steel flanges for longevity; use RC412 activated carbon for supreme air control and purification, carbon layer with a thickness of 38mm for greater absorption; comes with a pre-filter which is helpful to capture large particles and prolongs the life of the filter.

【FLEXIBLE DUCT】Ducting is made of high-quality aluminum and PVC, double layer design; built-in steel wire to ensure durable performance; fully extended length: 33FT; Passed GB8624B1 combustion test, safe to use. Adjustable clamps are made of stainless steel, sturdy and solid, longer life rating.

【COMPLETE VENTILATION SYSTEM】It is a complete set to provide good air circulation in your space, very easy to install; you can set it up in several ways to fit your needs, save money with a fan & filter combo kit that all works great together, stop buying parts separately that may not fit together.

【WIDE APPLICATIONS】This 4-inch Ventilation Kit has a wide variety of applications, you can use it in grow tents, grow rooms, bathrooms, kitchens, greenhouses, and more.