AC Infinity - RAXIAL S4, Inline Booster Duct Fan 4" with Speed Controller
Reviews coming soon
About this product
An inline fan for duct boosting designed to improve airflow in heating and air conditioning applications, and ventilate home rooms like attics, workshops, bathrooms, and kitchens. Each fan uses an easy-to-use knob controller that adjusts fan speed for your specific airflow boosting needs. It features a unibody framework that helps reduce vibration and ensures smooth and low-resistant airflow. The matte black steel cylinder is fluted and ridged for easy and secure installation in-between ducting. Its balanced steel blades have a 67,000-hour lifespan and spin using permanently lubricated dual-ball bearings to eliminate regular maintenance. The dual ball bearings also allow this fan system to be mounted horizontally or vertically. This kit includes one AC powered inline booster duct fan, a speed controller with a power plug, mounting screws, and a cable management set.
Features
Overview
A duct fan designed to boost airflow in HVAC systems and ventilate home spaces like attics and workshops.
Features a variable fan speed controller, enabling you to optimize airflow and noise level for any application.
Unibody die-cast construction with no welded seams; reduces vibration while ensuring smoother airflow.
AC brushless motor with steel blades and lubricated bearings; not suitable for restricted airflow applications.
Duct Size: 4” | Dimensions: 7.28 x 3.95 x 3.95 in. | Airflow: 106 CFM | Noise: 28 dBA | Bearings: Dual Ball
Specifications
- Adjustable HeightNoApp CompatibleNoFan TypeUtility FanNumber of Fan Speeds3Oscillating DesignNo
Reviews
This product doesn't have any reviews yet.
Compare similar products

An inline fan for duct boosting designed to improve airflow in heating and air conditioning applications, and ventilate home rooms like attics, workshops, bathrooms, and kitchens. Each fan uses an easy-to-use knob controller that adjusts fan speed for your specific airflow boosting needs. It features a unibody framework that helps reduce vibration and ensures smooth and low-resistant airflow. The matte black steel cylinder is fluted and ridged for easy and secure installation in-between ducting. Its balanced steel blades have a 67,000-hour lifespan and spin using permanently lubricated dual-ball bearings to eliminate regular maintenance. The dual ball bearings also allow this fan system to be mounted horizontally or vertically. This kit includes one AC powered inline booster duct fan, a speed controller with a power plug, mounting screws, and a cable management set.

This intelligent through-wall fan automatically moves air where it’s needed most, using dual-zone sensors to monitor temperatures on both sides and adjust airflow accordingly. The fan can automatically reverse direction to transfer warm or cool air between rooms, while AI mode continuously works to equalize temperatures for more consistent comfort. Whether one room runs hotter, colder, or simply needs more airflow, get smarter room-to-room temperature control without constantly adjusting the fan yourself.

Is your living room or bedroom affected by humidity or bad smell? Improve air quality with an indoor ventilation fan. It features bi-directional adjustable airflow, a multifunctional display panel, and a remote control, allowing easy adjustments via the remote or smart panel.

This plant circulation fan is designed for grow tents, featuring 10 precise speed levels to meet airflow needs across all plant growth stages. Supports 45° and 90° automatic oscillation with manual vertical adjustment for wide-area coverage. Delivers up to 125 CFM airflow with 5-blade ABS fan. Lightweight black ABS housing includes a 1.5 m Type-C to Type-C cable and simple button controls, providing an efficient one-fan solution for greenhouse ventilation.
Specs
Be the first to ask a question.
We’ll try to get your question answered within 24 hours by a Best Buy customer or brand representative.










































