VIVOSUN M4 4-Inch Inline Duct Fan – 195 CFM, EC Motor, Adjustable Speed

Efficient ventilation for grow spaces

Meet the VIVOSUN M4 4-Inch Inline Duct Fan, a compact yet mighty solution designed to move air where you need it most. With a PWM-controlled EC motor and a mixed-flow design, this unit delivers robust airflow while keeping energy use and heat to a minimum.

In practical setups, expect strong airflow with low energy consumption and minimal noise. The fan operates at about 2800 RPM and provides up to 195 CFM, offering a balance of power and efficiency that suits tents, rooms, or basements where air exchange matters.

Performance you can feel

The combination of a PWM-controlled EC motor and a mixed-flow design delivers reliable airflow while staying energy-efficient. The noise level remains low, making it a sensible pick for spaces that require steady ventilation without distraction.

• Efficient PWM-controlled EC motor for precise speed control
• Mixed-flow design delivering strong airflow with lower energy use
• 195 CFM capacity with a quiet 28 dB noise level

Adjustable, safe, and easy to wire

Fine-tune performance with a simple three-speed knob. The ETL-listed motor features automatic reset to prevent overheating and locked-rotor protection in case of blockage, plus a flame-retardant junction box for added safety.

• Three-speed PWM control for flexible airflow
• Automatic reset and locked-rotor protection
• Flame-retardant junction box for fire resistance

Setup and maintenance

Intake and exhaust flanges with locking tabs simplify hose connections, while the 5.9 ft cord provides flexible placement. Components detach for quick cleaning and servicing, helping you keep the unit performing steadily.

• Locking-tab flanges for quick, secure connections
• 5.9 ft power cord supports flexible installations
• Detachable housing, impeller, and blade simplify maintenance

Versatile applications

Use it to exhaust stale air, supply fresh air, and balance humidity in grow tents, grow rooms, basements, or other spaces where reliable ventilation matters. The M4 is designed to support consistent airflow across setups.

Note on expectations: This fan provides strong ventilation potential. Actual results depend on ducting, placement, and other factors in your space.