VIVOSUN 6-inch Inline Duct Fan with Speed Regulator — 240 CFM, Low-Noise Centrifugal Impeller

The VIVOSUN 6-inch plastic inline fan with speed regulator is a compact, low-noise duct fan designed to boost airflow in HVAC systems, grow rooms, bathrooms, and other confined spaces while letting you fine-tune ventilation speed.

Built for small- to medium-sized ventilation tasks, this VIVOSUN inline fan pairs a durable motor and balanced centrifugal impeller with a user-friendly speed regulator. Its reinforced construction and corrosion-resistant components make it suitable for humid or dusty environments, and the permanently lubricated bearing helps ensure quiet, maintenance-light operation. With a rated airflow of up to 240 CFM and a maximum speed near 2960 RPM, it delivers effective air exchange without taking up much room.

How does this fan improve airflow in tight or hidden vent spaces?

The slim inline design fits inside duct runs or behind walls where axial fans won’t, pushing or pulling air through ventilated systems without requiring a large footprint. Its centrifugal-style impeller provides steady pressure to move air through filters, carbon scrubbers, and longer ductwork with less drop in performance.

• 6-inch diameter sized for small ducts and grow-tent setups
• 240 CFM max airflow for consistent room exchange
• Balanced impeller reduces turbulence and maintains pressure
• Mountable on walls, ceilings, or shelving to save space

Will it be noisy and is it easy to control the speed?

VIVOSUN engineered this inline fan for quiet operation: the balanced impeller and lubricated bearing keep noise levels low, measured under 37 dB in typical conditions. The included speed regulator lets you dial ventilation up or down to match activity levels, filtration load, or noise preferences.

• Noise rating under 37 dB for minimal disturbance
• Permanently lubricated motor reduces maintenance and sound
• External speed regulator for gradual control over RPM and airflow
• Useful for night-time or low-noise environments like grow rooms

What safety and operating limits should I be aware of?

The fan runs on standard 110/120V power and consumes about 37W, with motor components designed to tolerate elevated temperatures. To keep the unit reliable, avoid letting foreign objects jam the blades, and follow the recommended cleaning schedule when the fan is used with carbon filters or in dusty conditions.

• Voltage: 110/120V; Power: 37W
• Motor max operating temp 130°C (266°F); ambient limit 60°C (140°F)
• Turn off immediately if blades become obstructed
• Initial cleaning after the first week when used with filters, then routinely

Where is this fan best applied and what can it replace?

This inline fan is versatile: it can serve as an exhaust or intake fan across domestic and light-commercial settings, often replacing bulky wall or window fans where space and noise control matter. It also integrates well with filtration systems in grow tents, workshops, and bathrooms to manage humidity, odors, and temperature.

• Bathrooms, kitchens, basements, attics, and workshops
• Grow rooms as intake or exhaust ahead of carbon filters
• HVAC boosts for localized duct sections or axial fan upgrades
• Mountable in-line to stay out of sight while delivering airflow

Who is this for: The VIVOSUN 6-inch inline fan suits hobbyist growers, home DIYers, and light-commercial users who need controlled ventilation in constrained spaces. Choose this unit if you want a compact, quiet, and adjustable duct fan that integrates with filters and ducting while providing reliable, low-maintenance performance.