Vortex 16XL, 16 inch V-Series 4515CFM Inline Fan
The V-Series fans are powered by an external rotor motor with a mixed-flow impeller. A mixed-flow impeller design is a cross between vane axial and centrifugal fans allowing for a higher static pressure (more air volume) than any other comparable impeller design of the same wheel diameter. Furthermore the VSeries fans operate between 1500 and 1700 RPM and the speed varies full-range, making them the quietest fans on the market. V-Series fans are available in 10 configurations. 3 year warranty.