VIVOSUN 4 Inch Inline Duct Fan 100 CFM — Quiet HVAC Exhaust for Basements, Bathrooms, Kitchens

The VIVOSUN 4 Inch Inline Duct Fan is a compact yet capable solution for moving air through tight spaces. Built from reinforced metal with corrosion resistance, this fan is designed for long lasting reliability in basements, bathrooms, kitchens, attics, and workshops. Its motor uses a permanently lubricated bearing, so you get dependable airflow without ongoing maintenance. The result is steady ventilation with a calm, unobtrusive sound that blends into daily activities.

Thanks to its small footprint, the four inch diameter fits where larger units cannot. Paired with a 2930 RPM motor and an impressive 100 CFM air flow, it delivers consistent performance without overwhelming the room. The balanced centrifugal impeller helps maintain smooth operation and reduces vibration, contributing to a quieter experience that stays well below the typical threshold for disruption.

Versatile applications for everyday spaces

Use this inline duct fan to support airflow in bathrooms and kitchens, or to improve air exchange in basements, attics, and workshops. It also functions well as an intake or exhaust option in compact HVAC setups. In grow spaces, it can serve as a reliable exhaust or intake solution where space is at a premium. The result is increased air movement and better system balance without the need for bulky equipment.

Key specifications at a glance

• Voltage: 110 120V
• Power: 14W
• Max motor temperature: 130 C
• Max ambient temperature: 60 C
• Diameter: 4 inches
• Air flow: up to 100 CFM
• Speed: 2930 RPM
• Noise: under 30 dB

Maintenance and care for long term performance

• Clean after the first week of use if a carbon filter is connected, then clean regularly based on usage
• Keep vents clear and free of obstructions to preserve airflow and efficiency
• Turn off if the blades ever become obstructed to prevent damage

Overall, this VIVOSUN inline fan is a flexible choice for hobbyists and professionals alike who need reliable ventilation in spaces where every cubic foot matters. It offers a dependable combination of durability, efficiency, and quiet operation without promising results that overstate its capabilities.