AC INFINITY CLOUDLINE PRO S4, Quiet Inline Duct Fan System with Speed Controller, 4-Inch

AC Infinity CLOUDLINE PRO S4 – 4” Inline Duct Fan with 10-Speed Controller

Silent Power. Smarter Ventilation. Built for Performance.

Take total control of your airflow with the CLOUDLINE PRO S4, AC Infinity’s next-gen 4” inline duct fan engineered for high-efficiency ventilation in grow tents, rooms, AV closets, and air-circulation projects. Featuring a high-precision EC motor, PWM technology, and an upgraded 10-speed controller, this fan offers ultra-quiet operation, exceptional performance in tight spaces, and complete speed control to suit your needs.

From hydroponics to home HVAC, this powerful inline fan is the perfect fusion of performance, silence, and reliability.

• Precision Airflow with 10-Speed Controller 
  Customise your fan speed with a wired controller offering ten levels of airflow control, memory backup, and seamless operation.

• Quiet & Efficient EC Motor 
  EC motor with PWM control ensures whisper-quiet performance (just 28 dBA!) with reduced energy consumption and less heat buildup.

• Advanced Mixed-Flow Design 
  Built with a stator blade and hydrodynamic wind circles, it delivers strong airflow even in high-resistance setups like carbon filters and long ducting runs.

• Modular & Easy to Maintain 
  The detachable motor box simplifies cleaning and maintenance, while dual ball bearings rated at 67,000 hours allow for flexible mounting.

• Smart Integration Ready 
  Fully compatible with the AC Infinity UIS™ ecosystem, including all smart controllers like Controller 67, 69, and the T/B-Series — ready for automation!

Tech Specs at a Glance

• Duct Size: 4"

• Airflow: 205 CFM

• Noise Level: 28 dBA

• Max Speed: 2800 RPM

• Static Pressure: 223 Pa

• Max Power Draw: 28W

• Average Power: 21W

• Voltage: 100–240V AC

• Humidity Rating: 35–85% RH

• Ingress Protection: IP44

• Cord to Controller: 10 feet

• Mounting Options: Horizontal / Vertical

• Dimensions: 7.40 x 11.93 x 6.93 in

 What’s Included

• 1 x CLOUDLINE PRO S4 4” Inline Fan

• 1 x 10-Speed Wired Controller

• 1 x UIS to 4-Pin Adapter

• Mounting Hardware

• User Manual

Perfect For:

• Hydroponic grow tents and rooms 

• AV equipment cooling and server closets ️

• Odour control and duct ventilation systems

• Heat exhaust in small rooms, attics, or cupboards

⚙️ Boost Your Environment with Next-Level Ventilation —