AC Infinity RAXIAL S4 inline booster 4-inch fan improving HVAC airflow.
AC Infinity RAXIAL S4 speed controller for customizable airflow and quieter operation.
AC Infinity RAXIAL S4 unibody die-cast housing reduces vibration during use.
AC Infinity RAXIAL S4 balanced steel blades ensure smooth, efficient airflow.
AC Infinity RAXIAL S4 operates at 28 dBA for near-silent ventilation.
AC Infinity RAXIAL S4 4-inch duct connection fits standard HVAC setups.
AC Infinity RAXIAL S4 ideal for basements, bathrooms, kitchens, and workshops.

AC Infinity

AC Infinity RAXIAL S4 Inline Booster Duct Fan 4-inch with Speed Controller - Low Noise HVAC Blower

High-performance tools and home improvement made for confident daily results

$49.56

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Why customers choose TaskHolt Tools

Enhance Your Ventilation with Precision

The AC Infinity RAXIAL S4 inline booster duct fan is engineered to move air efficiently through 4 inch ducts, helping existing HVAC systems circulate air more effectively in areas like basements, attics, kitchens, and workshops. Its compact footprint fits into tight spaces while keeping noise to a minimum, so you can maintain comfort without distraction.

Designed for versatility, this unit offers a variable speed controller that lets you dial in the balance between airflow and quiet operation. The durable unibody die cast housing minimizes vibration for smoother airflow, while a shaded pulse induction motor paired with balanced blades and permanently lubricated dual ball bearings supports dependable performance over time. By combining these elements, the S4 delivers steady, predictable airflow without sacrificing energy efficiency.

What it delivers

  • 106 CFM airflow under typical conditions for improved ventilation
  • 28 dBA noise level for near silent background operation
  • 4 inch duct connection compatible with standard HVAC components
  • Variable speed controller to customize airflow and noise
  • Unibody die cast housing reduces vibration for smoother flow
  • Shaded-pole induction motor with balanced blades and dual ball bearings
  • Compact footprint suitable for tight spaces

Where to use

Ideal for boosting airflow in basements, bathrooms, kitchens, attics, and workshops where controlled ventilation can help manage humidity and air quality without introducing intrusive noise.

Technical notes

  • Dimensions: 7.28 x 3.95 x 3.95 in
  • Duct size: 4 in
  • Airflow: 106 CFM
  • Noise: 28 dBA
  • Bearings: Dual ball

Whether you are upgrading an existing system or venting a new space, the RAXIAL S4 provides a practical balance of performance and quiet operation. It is designed to be a reliable companion for everyday ventilation needs, offering flexibility without overpromising results.

FAQ

Q: What practical benefits does the RAXIAL S4 offer for home ventilation?

A: It helps boost existing airflow in HVAC systems, with adjustable speed to balance performance in spaces like basements, attics, and workshops.

Q: Is the unit suitable for tight spaces with limited clearance?

A: Yes. It has compact dimensions and a 4-inch duct connection, with dual ball bearings for long-lasting quiet operation.

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