Black AC Infinity inline duct fan with mounted metal bracket and detached wired speed controller on white background.

Cloudline S4 AC Infinity Fan with Speed Controller

$65.69
$65.69 $89.99
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Black AC Infinity inline duct fan with mounted metal bracket and detached wired speed controller on white background.
  • Black AC Infinity inline duct fan with mounted metal bracket and detached wired speed controller on white background.
  • AC Infinity duct fan unit shown mounted with attached ducting and digital speed controller on a wood-grain panel.
  • Black rectangular fan speed controller with circular buttons, highlighting 8 speed settings, memory, and wall mounting.
  • Cutaway view of an inline duct fan showing the internal motor and impeller with red and blue airflow indicators.
  • Black AC Infinity speed controller with circular knob and fan icon, including power cable on a dark background.
  • Technical diagram of Cloudline S4/T4 inline duct fan showing dimensions, power specs, and cord lengths in black and white.
  • Technical diagram showing dimensions and specifications for an inline fan speed controller with 8 speeds and PWM.
  • Black flexible ducting with metallic silver interior and two steel hose clamps against a plain white background.
  • Black AC Infinity inline duct fan with mounted metal bracket and detached wired speed controller on white background.
  • AC Infinity duct fan unit shown mounted with attached ducting and digital speed controller on a wood-grain panel.
  • Black rectangular fan speed controller with circular buttons, highlighting 8 speed settings, memory, and wall mounting.
  • Cutaway view of an inline duct fan showing the internal motor and impeller with red and blue airflow indicators.
  • Black AC Infinity speed controller with circular knob and fan icon, including power cable on a dark background.
  • Technical diagram of Cloudline S4/T4 inline duct fan showing dimensions, power specs, and cord lengths in black and white.
  • Technical diagram showing dimensions and specifications for an inline fan speed controller with 8 speeds and PWM.
  • Black flexible ducting with metallic silver interior and two steel hose clamps against a plain white background.
Cloudline S4 AC Infinity Fan with Speed Controller

Cloudline S4 AC Infinity Fan with Speed Controller

$65.69
$65.69 $89.99
Check out the Cloudline S4 ventilation package which has all you need to get you started

The AC Infinity CLOUDLINE S4 is a high-performance 4-inch inline duct fan engineered for quiet, efficient ventilation in grow tents, AV closets, rooms, and air circulation projects. Built with a mixed-flow design and a PWM-controlled EC motor, this fan delivers powerful airflow while maintaining exceptionally low noise levels. With eight adjustable speed settings, you can fine-tune airflow to match your environment without the motor noise or heat commonly found in traditional AC fans.

The detachable motor box allows for simple cleaning and maintenance, while the dual ball-bearing design enables mounting in any orientation. Whether you're ventilating a grow tent, cooling electronics, or managing air exchange in tight spaces, the CLOUDLINE S4 provides reliable, energy-efficient performance backed by durable construction and quiet operation.

Key Features

• 8-speed manual controller with PWM technology for precise, quiet airflow control
• Mixed-flow fan design maintains strong airflow even under high static pressure
• EC motor reduces noise and energy consumption compared to AC-powered fans
• Detachable motor housing simplifies cleaning and maintenance
• Dual ball bearings rated for 67,000 hours allow mounting in any direction
• IP44 rating provides resistance to dust and liquids for tough environments
• Compatible with CLOUDLINE T4 smart controllers for shared programming

Applications

• Ventilating grow tents, grow rooms, and hydroponic environments
• Cooling AV closets, equipment racks, and server cabinets
• Improving airflow in bathrooms, attics, workshops, and small rooms
• Air exchange for intake or exhaust setups
• Ideal for low-noise ventilation in sensitive environments

Product Specifications

Specification Details
Duct Size 4 inches
Airflow 205 CFM
Noise Level 28 dBA
Bearings Dual ball bearings
Dimensions 6.9 x 11.9 x 7.4 in
Motor Type EC motor with PWM control
Rating IP44 dust and splash resistant

What’s Included

• CLOUDLINE S4 Inline Duct Fan
• 8-Speed Manual Speed Controller (PWM)
• AC Power Adapter
• Mounting Hardware
• Installation Manual

** If you order a variation that comes with ducting you will receive genuine 4-Layer Black AC Infinity Ducting which is much higher quality than standard aluminum ducting.

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