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!

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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

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  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

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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

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⚙️ Boost Your Environment with Next-Level Ventilation —

Feature / Model	A4   – Basic	S4   – Pro	T4   – Smart	H4   – Fungiculture
Airflow (CFM)	205 CFM	205 CFM	205 CFM	212 CFM
Noise Level	28 dBA	28 dBA	28 dBA	27 dBA
Static Pressure	251 Pa	251 Pa	251 Pa	324 Pa
Max Speed (RPM)	2800 RPM	2800 RPM	2800 RPM	3000 RPM
Speed Control	10-Speed Dial	10-Speed Dial	Smart/Auto (WiFi)	10-Speed Dial
Controller Type	Basic Speed Dial	Advanced Speed Dial	CONTROLLER 69 PRO	Basic Speed Dial
Smart WiFi App Access	❌	❌	✅	❌
Humidity & VPD Monitoring	❌	❌	✅	❌
Custom Scheduling / Timers	❌	❌	✅	❌
EC Motor (PWM Controlled)	✅	✅	✅	✅
Mixed Flow Design	✅	✅	✅	✅
UIS™ Compatible	✅	✅	✅	✅
Ingress Protection Rating	IP44	IP44	IP44	IP65
Mounting Options	Horizontal / Vertical	Horizontal / Vertical	Horizontal / Vertical	Horizontal / Vertical
Fan Bearings	Dual Ball	Dual Ball	Dual Ball	Dual Ball
Lifespan	67,000 Hours	67,000 Hours	67,000 Hours	67,000 Hours