Vortex 4 in. Powerfan Inline Duct Fan with Pressure Switch
- The s-line is a revolutionary series of fans that combine energy efficiency, ultra-quiet operations and a collection of advanced technologies that deliver unparalleled performances..
- An extremely energy efficient ac brushless motor powers the patented mixed-flow dual impellers..
- Built with double insulated walls, noise is reduced to levels that were previously thought to be unattainable..
- All s-line models are assembled with high impact resistant polycarbonate casings, an integrated back draft damper and a mounting bracket designed for quick and easy installation..