AC Infinity CLOUDLINE PRO S8 8" Inline Duct Fan — 807 CFM, Quiet EC Motor with 10-Speed Controller

The AC Infinity CLOUDLINE PRO S8 is a compact, low-noise 8" inline duct fan engineered to move up to 807 CFM of air quietly and efficiently for grow rooms, AV closets, or HVAC transfer.

With a mixed-flow impeller, an electronically commutated (EC) PWM motor, and a wired 10-speed controller, the CLOUDLINE PRO S8 balances strong airflow with whisper-quiet operation. It’s built for spaces that demand reliable ventilation under resistance — from hydroponic tents to equipment cabinets — and offers compatibility with AC Infinity’s UIS controllers for automated scheduling and environmental control.

How does the S8 keep noise low while moving a lot of air?

The fan uses an EC motor with PWM control and dual ball bearings to minimize mechanical vibration and heat. The mixed-flow blade profile and hydrodynamic wind circles reduce turbulence so the unit maintains high CFM without producing excessive sound.

• Noise rating: 39 dBA at typical operating speeds
• EC motor with PWM for precise speed control and reduced electrical noise
• Dual ball bearings for longer life and quieter rotation
• Mixed-flow impeller reduces turbulent airflow that causes noise

What airflow and sizing should I expect from the CLOUDLINE PRO S8?

This model is an 8" duct fan delivering up to 807 CFM in free-air conditions, suitable for mid-size grow tents and ventilation runs. Its compact housing (8.5 x 11.9 x 9.2 in) makes it easy to position inline with ducting while still providing robust airflow for high-resistance setups.

• Duct diameter: 8 inches for standard duct compatibility
• Maximum airflow: 807 CFM (free-air rating)
• Unit dimensions: 8.5 x 11.9 x 9.2 inches for tight installations
• Performs well in setups with longer duct runs or filters

How do I control speed and integrate with smart ventilation systems?

The S8 ships with a wired 10-speed controller for immediate, granular manual control. It’s also compatible with AC Infinity’s UIS series controllers, allowing temperature, humidity, or timer-based automation for hands-off environmental management.

• Includes a wired 10-speed fan controller for precise manual adjustments
• Supports UIS controllers for automated, sensor-driven control
• PWM input allows efficient, low-heat motor regulation
• Simple electrical hookup for retrofit or new installs

Where is the S8 best used and what durability features help it last?

The CLOUDLINE PRO S8 is designed for applications that require continuous operation and stable airflow under load: hydroponic grow rooms, AV or server closets, general exhaust, and heating/cooling transfer. It incorporates durable bearings and an efficient motor to extend service life while maintaining performance.

• Ideal uses: grow tents, HVAC transfer, AV closets, odor exhaust
• Long-life dual ball bearings reduce maintenance needs
• EC motor runs cooler and more efficiently than standard AC motors
• Mixed-flow design maintains performance in restrictive ducting

Who is this for? The AC Infinity CLOUDLINE PRO S8 suits hobbyist and prosumer growers, AV technicians, and DIY HVAC installers who need high airflow without a loud fan. If you want a compact inline fan that pairs strong CFM with low acoustic output, easy speed control, and optional smart integration for environmental automation, the S8 is a practical, long-lasting choice.