VIVOSUN 4" Inline Exhaust Fan 130 CFM with Stepless Speed Control — Quiet EC Motor, Compact 4" Duct

The VIVOSUN 4" Inline Fan with Speed Control is a compact 130 CFM exhaust fan that delivers efficient, quiet ventilation for grow tents, workshops, bathrooms, and other small spaces.

This inline fan combines a high-efficiency EC motor and stepless speed regulator to move air reliably while minimizing energy use and noise. Built with durable ABS housing and PBT blades, it mounts inline or on walls and ceilings and includes safety features such as low-voltage protection and stall prevention. Whether you need consistent airflow for a grow tent or fast exhaust for a small workshop, this fan offers adjustable performance in a small footprint.

How much airflow and where can I use this fan?

The fan delivers up to 130 CFM of airflow, suitable for small to medium enclosures and local ventilation points. It works well as an inline booster for duct runs, or mounted directly to vents in greenhouses, bathrooms, kitchens, attics, basements, and workshops.

• Rated airflow: up to 130 CFM for rapid air exchange
• Mounting options: inline duct, wall, or ceiling installation
• Typical applications: grow tents, small greenhouses, bathrooms, workshop exhaust
• Compact 4" duct compatibility for tight spaces

Will it be noisy and how is energy usage?

The VIVOSUN fan is engineered for quiet operation, running at approximately 26 dB(A) under normal conditions—about the level of a whisper in a quiet room. Its upgraded EC motor improves efficiency, delivering strong airflow while drawing less power than conventional AC motors.

• Noise level: around 26 dB(A) for low-disturbance use
• Motor type: efficient EC motor for reduced electricity consumption
• Suitable for noise-sensitive areas like bedrooms or home offices
• Extended motor life lowers long-term operating costs

How do I control airflow and install the fan?

Airflow is adjustable via the included stepless speed controller that lets you fine-tune ventilation to match room conditions or plant needs. Installation is straightforward: connect to 4" ducting or mount directly using the provided brackets and secure with clamps or screws.

• Speed control: stepless regulator for precise adjustment
• Installation: inline or fixed mount on wall/ceiling with standard hardware
• Power: wide-voltage adapter with low-voltage safety and stall protection
• Hardware: compatible with common 4" duct clamps and connectors

What safety and durability features are included?

The fan uses sturdy ABS housing and PBT blades to resist deformation and deliver prolonged performance in humid or warm environments. Built-in stall protection and a wide-voltage power adapter add layers of electrical safety, while the EC motor design reduces heat build-up and maintenance needs.

• Materials: ABS housing and PBT blades for long-lasting durability
• Safety: low-voltage circuit and stall protection to prevent damage
• Maintenance: low-wear motor reduces service frequency
• Weather tolerance: suitable for non-submerged indoor and semi-enclosed applications

Who is this for: The VIVOSUN 4" Inline Fan is ideal for home gardeners, hobby growers, DIY workshop owners, and homeowners who need a compact, quiet exhaust solution. Choose this model when you want adjustable airflow, energy-efficient performance, and a durable build for small ducts, grow tents, bathrooms, basements, or any confined area requiring reliable ventilation.