VIVOSUN 4" Inline Fan 130 CFM — Stepless Speed Controller, Quiet Efficient Ventilation

The VIVOSUN 4" Inline Fan is a compact 130 CFM exhaust fan with a stepless speed controller designed to deliver efficient, quiet ventilation for small grow tents, workshops, and household spaces.

Whether you need reliable air exchange for a grow tent, improved airflow in a workshop, or odor control in a bathroom or basement, this inline fan balances performance and low-noise operation. It pairs an upgraded EC motor with durable ABS housing and PBT blades to provide steady airflow while using less power. The included speed controller offers precise tuning so you can dial in airflow to match the room size and application.

How much airflow and noise can I expect from this 4" inline fan?

This fan delivers up to 130 CFM of airflow, suitable for small enclosures or localized ventilation tasks. It operates at a low sound level (around 26 dB(A)), so it won’t overpower living spaces or quiet work areas.

• Peak airflow: 130 CFM for efficient air exchange
• Noise: approximately 26 dB(A) for quiet operation
• Suitable for: small grow tents, bathrooms, workshops, attics, and basements

What makes the motor and materials durable and energy-efficient?

The fan uses an upgraded EC (electronically commutated) motor that combines brushless efficiency with longer service life and lower electrical draw. The housing is molded ABS plastic and the impeller is PBT, selected to resist deformation and maintain consistent performance under continuous operation.

• EC motor: high efficiency with reduced power consumption
• ABS housing and PBT blades: impact and heat resistant
• Designed for continuous use with reduced maintenance needs

How does the speed controller help tailor ventilation to my space?

The stepless speed regulator provides smooth, continuous control so you can set the exact fan speed rather than fixed steps. That precise adjustment helps balance airflow, noise, and energy use depending on the task—boosting exchange for odor removal or easing back for gentle circulation.

• Stepless control: infinitely variable fan speed
• Fine-tune airflow to match tent sizes or room volumes
• Reduces energy waste by avoiding over-ventilating small spaces

Is the fan safe and easy to install in common setups?

Yes—this model includes built-in protections such as stall protection and a wide-voltage adapter to improve electrical safety. Its compact 4" form factor makes it straightforward to mount in inline duct runs, attach to grow tent ports, or integrate into small ventilation assemblies.

• Safety features: stall protection and low-voltage safeguards
• Wide-voltage adapter for compatibility with varied supplies
• Compact design: fits standard 4" ducting and small enclosures

Who is this for? The VIVOSUN 4" Inline Fan is aimed at hobby growers, DIY workshop users, and homeowners who need a compact, efficient exhaust solution. It’s a good fit for anyone managing air quality in small grow tents, bathroom or kitchen vents, basements, attics, or localized workshop setups that require quiet, adjustable airflow without the complexity of large ventilation systems.