Keep your home ventilation system maintained with a Vortex Powerfans VTX400P Centrifugal Exhaust Fan. This component part has a 4" duct diameter and can be installed in a variety of home air systems. The exhaust inline fan has an external rotor motor with automatic reset thermal overload protection that can be used in airstream temperatures up to 140 degrees Fahrenheit. It has permanently lubricated sealed bearings that make maintenance easier. The Vortex exhaust fan is covered under a 10-year warranty for added convenience. The unit is prewired with a 120V power cord and ETL listed for safe operation. It comes with the necessary brackets needed for proper wall or ceiling mounting.Get more news about Vortex Centrifugal Fan,you can vist our website! Have more than 30 patants for appearences, ferformances and motors. 1. Our process technology keep pace with the worlds' high-end products. 2. Low noise, high pressure, light weight and easy to control. 3. Main material is eco-friendly aluminium alloy, 4. Precision Die-casting technology and the techniques lead 3-5 years in air blower industry. 5. Scientific structural design.