TT Silent M 315 is Vents-US’s largest Turbo Tube Silent M inline mixed-flow duct fan for 12 3/8 in ducts. The two-speed, ball-bearing AC motor (120 V, 60 Hz) drives an aerodynamic impeller inside a metal, sound-absorbing housing designed to reduce noise and vibration. At zero static pressure it is rated up to 1,050 CFM (≈1,784 m³/h) and includes a built-in speed switch. Typical uses include long-run residential or light-commercial exhaust and supply where low noise and high pressure capability are required. The model ships with a mounting plate and power cord and carries ETL/HVI certifications and a manufacturer warranty.