AC Infinity CLOUDLINE PRO S4 | Quiet Inline Duct Fan System with Speed Controller | 4-Inch

Key Specs: 28W | 205 CFM | 2800 RPM Max | 223 Pa Static Pressure | EC Motor | PWM 10-Speed | 67,000-Hour L10 Life | 2-Year Warranty

Kill Variance. Print Yield.

Every sealed cultivation room runs on a margin that most operators never see on a spreadsheet — the atmospheric margin. Legacy fixed-speed fans and passive failure points erode it silently. A motor running at full draw regardless of room demand creates heat load your HVAC system absorbs at a cost. A fan with no speed memory resets to maximum after every power event, blowing your VPD setpoints off-target before the next light cycle begins. Inconsistent environmental control is not a maintenance problem; it is a yield problem, and it compounds across every room, every cycle, every quarter.

After deployment, the facility operates differently. Airflow is dialed to the exact speed the room demands — not the speed the hardware defaults to. Power interruptions do not reset your atmospheric parameters; the controller remembers its last setting and resumes without operator intervention. Ducted exhaust runs maintain consistent static pressure across the canopy zone. The environmental layer of your operation stops being a variable and starts being a constant, and constants are what repeatable yield is built on.

The mechanism behind that stability is an EC (electronically commutated) motor running on PWM (Pulse Width Modulation) control — a motor architecture that modulates speed precisely rather than throttling a fixed-speed AC motor through voltage reduction. The CLOUDLINE S4 delivers 205 CFM at peak draw, operates across 100–240V AC at 50/60 Hz, and pulls a maximum of 28 watts at 2800 RPM against 223 Pa of static pressure. The 10-speed controller — with a 10-foot cord to the control unit — gives operators granular airflow authority without requiring a separate automation layer. Certifications include ETL, CE, RoHS, SAA, and IC. In practical terms, the CLOUDLINE S4 delivers 205 CFM of controlled airflow through a 4-inch duct at 28 watts maximum draw, with speed memory that survives power interruptions and resumes at the last operator-set position.

Where This Belongs (and Doesn't)

This unit requires a 4-inch duct connection and a standard 100–240V AC circuit. Verify that your ducting diameter, static pressure requirements, and circuit capacity match the specifications below before ordering.

Infrastructure Note: The CLOUDLINE S4 fan unit measures 7.40 x 11.93 x 6.93 in. (18.8 x 30.3 x 17.6 cm). The controller measures 3.34 x 2.95 x 0.51 in. (8.5 x 3.6 x 1.3 cm) with a mounting hole-to-hole distance of 3.15 x 2.36 in. (8.0 x 6.0 cm) and a 0.197 in. (0.5 cm) screw hole diameter. Plan mounting clearance and cord routing for the 120 in. (10-foot) controller cord before installation.

How It Works

The CLOUDLINE S4 uses a mixed-flow impeller design driven by an EC (electronically commutated) motor — a motor class that is fundamentally different from the AC induction motors found in standard inline fans. EC motors modulate rotational speed through PWM (Pulse Width Modulation) signals, meaning the motor is not being throttled by voltage reduction or mechanical damping. Speed changes are clean, repeatable, and energy-proportional: at lower speed settings, the motor draws proportionally less power rather than dissipating excess energy as heat. At maximum output, the motor reaches 2800 RPM, moves 205 CFM, and overcomes up to 223 Pa of static pressure — the resistance created by duct length, bends, and connected filtration media — while drawing only 28 watts from a 100–240V AC, 50/60 Hz circuit.

The 10-speed controller gives the operator discrete, repeatable airflow positions rather than an analog dial with no reference points. Speed 1 through 10 are consistent and reproducible across power cycles because the controller includes backup memory: when power is cut and restored, the unit returns to the last operator-set speed without requiring manual reset. This is not a convenience feature — in a sealed cultivation environment, it is an atmospheric continuity mechanism. The controller connects to the fan unit via a 120 in. (10-foot) cord, allowing wall-mount positioning independent of the fan's duct location. The L10 life expectancy of the EC motor is rated at 67,000 hours — the point at which 90% of units in a population are expected to still be operating. In practical terms, the CLOUDLINE S4 delivers 205 CFM through a 4-inch duct at a maximum of 28 watts, with 223 Pa static pressure capability and a 67,000-hour motor life rating that reduces unplanned replacement cycles in operating facilities.

System Integration

To operate this platform at peak efficiency, verify your ecosystem matches these requirements:

• Ducting: Requires 4-inch diameter duct connections at both inlet and outlet. Verify duct diameter, total run length, and number of bends before sizing — each 90-degree bend adds effective static pressure resistance.
• Power Circuit: Operates on 100–240V AC, 50/60 Hz. Maximum draw is 28 watts. A standard 15A circuit supports multiple units; verify total load against circuit capacity for multi-unit installations.
• Controller Mounting: The controller mounts via 3.15 x 2.36 in. (8.0 x 6.0 cm) hole-to-hole spacing with 0.197 in. (0.5 cm) screw holes. Plan wall or panel mounting location within 120 in. (10 feet) of the fan unit.
• HVAC Coordination: Exhaust CFM must be balanced against makeup air supply. At 205 CFM maximum, verify that your facility's fresh air intake capacity matches or exceeds the exhaust volume to prevent negative pressure buildup.
• Automation Expansion: The S4 operates as a standalone 10-speed manual unit. Facilities requiring trigger-based automation (temperature, humidity, schedule) should evaluate AC Infinity controller accessories for ecosystem integration.

Facility Integration Data

The following data supports procurement planning, fleet budgeting, and facility-level deployment decisions for the AC Infinity CLOUDLINE S4.

Operator Field Note

• Physical Dimensions: The fan unit measures 7.40 x 11.93 x 6.93 in. (18.8 x 30.3 x 17.6 cm). Verify duct clearance, ceiling height, and structural mounting capacity before installation. The unit must be supported independently — do not rely on duct connections alone for structural support.
• Electrical Draw: Maximum power draw is 28 watts on a 100–240V AC, 50/60 Hz circuit. For multi-unit installations, calculate total amperage load per circuit before energizing. At 120V, 28W draws approximately 0.23A per unit.
• Static Pressure Ceiling: Rated to 223 Pa. Installations with long duct runs, multiple bends, or inline carbon filtration media will consume static pressure budget. Calculate total system resistance before finalizing duct layout to avoid operating the fan at or near its pressure limit continuously.
• Controller Cord Management: The controller cord is 120 in. (10 feet) fixed length. Plan mounting location accordingly. Do not extend the cord with aftermarket splices — this voids the warranty and introduces a failure point in the control signal path.
• Speed Memory Behavior: On first power-up after installation, the unit defaults to the last factory or operator-set speed. Confirm the desired operating speed is set before leaving the installation site, as this is the speed the unit will resume after any subsequent power interruption.

Shipping & Logistics

• Origin: Ships from Cannafull Spectrum Solutions' authorized distribution point within the contiguous 48 United States.
• Processing: Orders are processed within 1–2 business days of receipt. Expedited processing is not available for this product category.
• Damage: Inspect all shipments within 48 hours of delivery. Report any shipping damage to Cannafull Spectrum Solutions at (888) 378-0017 or sales@cannafullspec.com within that window. Claims reported after 48 hours may not be eligible for carrier coverage.
• Returns: Free and Easy Returns accepted within 30 days of delivery. A Return Authorization (RA) number is required before shipping any unit back. Contact Cannafull Spectrum Solutions to initiate.
• Restocking Fee: Returns of non-defective items are subject to a restocking fee of up to 25% per our Return Policy. Review full terms at cannafullspec.com/pages/return-policy before ordering.

Questions? (888) 378-0017 or sales@cannafullspec.com

What's in the Box

• AC Infinity CLOUDLINE S4 inline fan unit (4-inch)
• 10-speed PWM controller with 120 in. (10-foot) cord

Note: Box contents are based on available manufacturer data. Verify complete contents upon receipt. Contact Cannafull Spectrum Solutions at (888) 378-0017 if any components are missing or damaged.

Regional Compliance & Deployment Notes

Commonly deployed in sealed commercial cultivation facilities across the United States. Installation, HVAC sizing, and electrical requirements vary by jurisdiction; always verify with local code.