The VENTS TT Silent M 100 4 in. Metal Mixed Flow Inline Duct Fan delivers up to 128 CFM of airflow, providing quiet, efficient ventilation for inline exhaust applications, duct boosting, and improving airflow in HVAC duct systems, including bathroom exhaust ventilation.Its mixed-flow impeller combines the advantages of axial and centrifugal fan technology to deliver excellent airflow, even in higher static pressure duct systems.The durable powder-coated metal housing features integrated sound insulation for quieter operation and long service life.It helps improve indoor air quality by removing excess moisture, humidity, odors, and stale air.Ideal for exhaust ventilation in bathrooms, utility rooms, laundry rooms, offices, workshops, apartments, educational facilities, and other residential and light commercial applications requiring quiet, efficient ventilation.Its compact size makes it ideal for installations where space is limited.Engineered with long-life ball bearings, the TT Silent M 100 provides dependable, energy-efficient performance for years of reliable operation.