AC Infinity CLOUDLINE PRO S6 6" Inline Duct Fan — 402 CFM, Quiet 32 dBA PWM EC Motor

The AC Infinity CLOUDLINE PRO S6 is a quiet, energy-efficient 6" inline duct fan built for steady high-resistance airflow in grow tents, HVAC runs, and AV enclosures.

Compact yet powerful, the CLOUDLINE PRO S6 pairs a PWM-controlled EC motor with a mixed-flow impeller to move up to 402 CFM while producing as little as 32 dBA of noise. It ships with a wired 10-speed controller and works with AC Infinity UIS systems so you can program schedules, adjust speeds precisely, and balance airflow against noise and heat. The fan's mixed-flow design and dual ball bearings are engineered for longer life and reliable performance in applications that demand continuous ventilation.

How does this fan keep noise low while delivering strong airflow?

The CLOUDLINE PRO S6 uses a PWM-controlled electronically commutated (EC) motor and a mixed-flow impeller to optimize efficiency and reduce turbulence. Those components, combined with hydrodynamic wind circles and stator blades, minimize mechanical noise even when pushing air through long or restrictive duct runs.

• PWM EC motor reduces electrical and mechanical noise.
• Mixed-flow impeller with stator blade smooths airflow for quieter operation.
• Hydrodynamic wind circles lower turbulence in high-resistance ducts.
• Measured noise as low as 32 dBA at typical speeds.

What controls and compatibility does the S6 offer for precise ventilation?

The unit includes a wired 10-speed controller for quick manual adjustments and is compatible with AC Infinity UIS controllers for automated programming. You can set schedules, link to temperature or humidity sensors (with UIS), or fine-tune speed to match environmental needs without rewiring the fan itself.

• Included wired 10-speed controller for instant adjustments.
• Works with UIS smart controllers for timer and sensor automation.
• PWM control enables accurate speed steps and repeatable settings.
• Plug-and-play wiring simplifies installation in most setups.

Will the S6 perform well in tight or restrictive duct systems?

Yes. The fan's mixed-flow architecture and high-efficiency motor are specifically designed to overcome static pressure in restrictive installations like long duct runs or carbon filter setups. It maintains usable CFM where axial fans typically lose performance.

• Airflow rated at 402 CFM for a 6" duct size.
• Performance holds up under higher static pressure conditions.
• Dual ball bearings extend life during continuous operation.
• Compact housing fits many tight installation spaces (7.9 x 12.6 x 8.4 in.).

How energy efficient and durable is the CLOUDLINE PRO S6?

The EC motor and optimized impeller reduce electricity draw compared with comparable AC fans, and the robust bearings minimize wear from long run times. That combination lowers operating cost and reduces downtime from maintenance or failure.

• PWM-controlled EC motor for lower power consumption.
• Dual ball bearings for longer mechanical lifespan.
• Designed for continuous use in grow tents, AV racks, and HVAC transfer.
• Minimal heat output helps controllers and enclosed spaces stay cool.

Who this is for: Growers, hobbyists, and professionals who need a compact but capable inline fan for tents, rooms, or AV cabinets will value the CLOUDLINE PRO S6. It's also a good fit for anyone wanting precise speed control, low acoustic footprint, and dependable performance in ducted or high-resistance ventilation setups. If you need a 6" fan that balances quiet operation, programmable control options, and sustained airflow, the AC Infinity CLOUDLINE PRO S6 is built for those demands.