Product Overview
The AC Infinity CLOUDLINE PRO S4 is a quiet and energy-efficient 4-inch inline duct fan designed for various ventilation applications. It features an EC motor with PWM control, offering superior performance and reduced noise compared to traditional AC motors. This fan is ideal for ventilating grow tents, transferring heating or cooling to rooms, circulating air, exhausting odors, and cooling AV racks. It comes with a wired 10-speed controller for precise airflow management and is compatible with all UIS controllers for intelligent programming.

Image: The AC Infinity CLOUDLINE PRO S4 inline duct fan and its wired speed controller.
Setup and Installation
Proper installation of your CLOUDLINE PRO S4 fan is crucial for optimal performance and safety. The fan is designed for inline ducting systems and can be mounted in various orientations. Ensure all connections are secure and airtight to prevent air leaks and maximize efficiency.
Components Included:
- CLOUDLINE PRO S4 Inline Duct Fan
- Wired 10-Speed Controller
- Mounting Hardware (screws, wall anchors)
- Power Cord
Installation Steps:
- Choose Location: Select a suitable location for the fan within your ducting system. Consider accessibility for maintenance and proximity to power outlets.
- Mount Fan: Use the included mounting hardware to securely attach the fan to a stable surface, such as a wall or ceiling joist. Ensure the fan is level.
- Connect Ducting: Attach appropriate 4-inch ducting to both ends of the fan. Use duct clamps (not included) to ensure a tight, leak-free seal.
- Connect Controller: Plug the wired speed controller into the designated port on the fan.
- Power On: Plug the fan's power cord into a standard electrical outlet.

Image: Diagram illustrating the setup of the duct fan within a ventilation system, showing connections to ducting and a carbon filter (filter not included).

Image: The CLOUDLINE PRO S4 fan installed inside a grow tent, connected to ducting for exhaust.
Operating Instructions
The CLOUDLINE PRO S4 is operated using its wired 10-speed controller. This controller allows you to precisely adjust the fan's speed to meet your ventilation needs.
Speed Controller Functions:
- Power Button: Press to turn the fan ON or OFF.
- Speed Adjustment: Use the up/down buttons to cycle through 10 different fan speeds. The current speed setting is indicated by illuminated LEDs on the controller.
- Memory Function: The controller features a backup memory that retains your last speed setting even after a power interruption.
For advanced control, the CLOUDLINE PRO S4 is compatible with all AC Infinity UIS controllers (sold separately). These intelligent controllers offer programmable features and app control for automated environmental management.

Image: Detailed view of the wired speed controller, highlighting its 10-speed adjustment, power switch, and memory function.

Image: Diagram showing how the CLOUDLINE fan integrates into the AC Infinity Ecosystem with other UIS-compatible devices for comprehensive environmental control.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your CLOUDLINE PRO S4 fan.
Cleaning:
- Periodically inspect the fan blades and housing for dust and debris buildup.
- Disconnect the fan from power before cleaning.
- Use a soft, dry cloth or a vacuum cleaner with a brush attachment to gently remove any accumulated dust. Avoid using harsh chemicals or abrasive materials.
Inspection:
- Check ducting connections regularly to ensure they remain secure and airtight.
- Inspect the power cord and controller cable for any signs of damage.
Troubleshooting
If you encounter issues with your CLOUDLINE PRO S4 fan, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| Fan not turning on | No power, loose connection, controller issue | Check power outlet, ensure all cables are securely connected, try a different outlet. |
| Low airflow | Ducting obstruction, fan speed too low, air leaks | Check ducting for blockages, increase fan speed, inspect ducting for leaks and seal them. |
| Excessive noise | Loose mounting, debris in fan, ducting vibration | Ensure fan is securely mounted, clean fan blades, secure ducting to prevent vibration. |
| Controller unresponsive | Cable issue, internal fault | Check controller cable connection. If issue persists, contact customer support. |
Specifications
Detailed technical specifications for the AC Infinity CLOUDLINE PRO S4:
| Feature | Detail |
|---|---|
| Model | CLOUDLINE S4 |
| Duct Size | 4 Inches |
| Airflow Capacity | 205 Cubic Feet Per Minute (CFM) |
| Noise Level | 28 dBA |
| Power Usage | 21 Watts |
| Bearings | Dual Ball |
| Control Method | Wired Speed Controller (PWM) / App (with UIS controller) |
| Product Dimensions | 6.9"D x 7.4"W x 11.9"H |
| Cable Length (Power) | 144 Inches (12 ft) |
| Voltage | 240 Volts |

Image: Diagram showing the dimensions and key specifications of the CLOUDLINE S4 fan and its controller.
Warranty and Support
For detailed warranty information and customer support, please refer to the official AC Infinity resources.
- User Manual (PDF): For a comprehensive guide, download the official user manual: Download User Manual
- Brand Store: Visit the AC Infinity brand store for product information, accessories, and support: AC Infinity Store





