Grower Tip
- Mount it as your exhaust at the top of the tent, pulling hot air out through a carbon filter while fresh air draws in low down.
- Start low — the 10-speed EC controller runs near-silent, so dial airflow to your tent size rather than running it flat out.
- The motor box unclips from the frame for cleaning — pull it off every few months to clear dust off the impeller.
Features
A PWM-controlled EC motor runs smoothly down to very low RPM at just 28dBA, drawing around 21W on average.
A stator blade and dual wind circles hold 205 CFM even through a filter or long ducting (223Pa static pressure).
A wired 10-speed controller with backup memory recalls your last speed setting after a power cut.
Plug into any UIS controller, like the Controller 69, for dynamic VPD, temperature and humidity programming.
Dual ball bearings rated to 67,000 hours let you mount it horizontally or vertically, in any orientation.
Resists dust and liquid for humid grow rooms, and is certified to CE, ETL, SAA and RoHS.
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1
Position the fan
Sit it inline in your duct run; it can mount horizontally or vertically, any way up.
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2
Connect ducting
Attach 100mm ducting to each end and secure with clamps, adding a carbon filter on the intake side to scrub odour.
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3
Set exhaust direction
Point the airflow toward your exhaust, usually out the top of the tent.
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4
Plug it in
Connect the Australian power cord to a standard outlet.
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5
Set the speed
Use the wired 10-speed controller; it remembers the last setting after a power cut.
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6
Automate (optional)
Connect a UIS controller like the Controller 69 for VPD, temperature and humidity programming.
What size tent does it suit?
At 100mm (4in) and 205 CFM, it's comfortable for a 2x2 up to a small 3x3 grow tent, and it's just as at home cooling an AV closet, rack or cabinet.
Is it quiet?
Yes — it's rated at 28dBA, and the PWM EC motor runs smoothly at low RPM, so you can wind it down to near-silent airflow.
Does it come with a controller?
Yes, a wired 10-speed controller with backup memory. Add a UIS Controller 69 for dynamic VPD, temperature and humidity programming.
Can I mount it in any direction?
Yes — dual ball bearings rated to 67,000 hours let you mount it horizontally or vertically, in any orientation.
Should I run it as intake or exhaust?
Either, but it's usually run as exhaust at the top of a tent, paired with a carbon filter on the intake side to scrub odour.
Which Cloudline size do I need?
This is the S4 (100mm). AC Infinity also makes the S6 (150mm) and S8 (200mm) for larger tents and grow rooms.
Description
A smart inline duct fan designed to quietly ventilate hydroponic grow rooms, boost heating/cooling to rooms, circulate fresh air, exhaust projects, and cool AV closets.
Featuring an inline mixed-flow design, the duct fan can maintain airflow even in high static pressure applications. It is built with a PWM-controlled EC motor for quiet and energy-efficient performance. The motor box containing the fan’s impeller and blades can be detached from the mounted frame for easy cleaning and maintenance.
Includes a smart controller with dynamic climate and time-based programming and can connect to multiple UIS devices. This product is a part of the UIS™ platform of grow devices and smart controllers, designed to integrate with each other to achieve your ideal environment
Precise Speed Controller
The speed controller enables you to set the duct fan’s speed between ten speed levels to optimal noise and airflow levels in various environments. The precise airflow control is supported by the inline fan’s cutting-edge EC motor that is precisely controlled using PWM (Pulse Width Modulation). This enables it to run smoothly at extremely low RPM speeds without generating motor noise. Also features backup memory that retains the last speed setting whenever power is cut off from the controller.
Quiet and Energy Efficient Design
This duct fan uses a mixed-flow design using a stator blade and dual hydrodynamic wind circles, enabling it to deliver airflow even in applications where air movement is restricted. The motor houses dual ball bearings rated at 67,000 hours which allows the duct fan unit to be mounted in any direction. The unit is IP44 rated to be highly resistant to dust and liquids and performs well even in harsh environments.
Applications
This quiet duct fan system is popular in a variety of applications including cooling AV equipment rooms, closets, racks, and cabinets. Due to its low noise and advanced control features, it’s also used in various air circulation and ventilation projects including hydroponic grow rooms and tents, exhausting bathrooms and attics, and other installations.
- Designed to quietly ventilate grow tents, transfer heating/cooling to rooms, circulate fresh air, and cool AV closets.
- Features a wired 10-speed fan controller; also compatible with all UIS controllers with intelligent programming.
- PWM-controlled EC motor provides quiet and energy-efficient performance with minimal heat and noise.
- Mixed flow design with stator blade and hydrodynamic wind circles enables airflow delivery in high resistance areas.
- Duct Size: 4” | Dimensions: 6.9 x 11.9 x 7.4 in. | Airflow: 205 CFM | Noise: 28 dBA | Bearings: Dual Ball
Technical Specifications Cloudline Pro S4
| Product Identification Cloudline Pro S4 | |
| Manufacturer | AC Infinity Inc. |
| Product Name | CLOUDLINE S4 |
| Product Model | AI-CLS4 |
| UPC Code | 819137020290 |
| Product and Mounting Dimensions - Fan Unit | |
| Duct Size | 4" |
| Total Dimensions | 7.40 x 11.93 x 6.93 in. (18.8 x 30.3 x 17.6 cm) |
| Mounting Hole-To-Hole Distance | 3.15 x 2.36 in. (8.0 x 6.0 cm) |
| Screw Hole Size | Ø 0.197 in. (Ø 0.5 cm) |
| Cord Length to Controller | 120 in. (10 feet) |
| Product and Mounting Dimensions - Controller | |
| Total Dimensions | 3.34 x 2.95 x 0.51 in. (8.5 x 3.6 x 1.3 cm) |
| Product Performance and Technical Specs | |
| Total Airflow | 205 CFM |
| Total Noise | 28 dBA |
| Max Speed | 2800 RPM |
| Static Pressure | 223 Pa |
| Voltage | 100-240V AC |
| Frequency | 50/60 Hz |
| Max Power Draw | 28 W |
| Average Power Usage | 21 W |
| Current | 0.4 A |
| Power Connector Type | Australian Power-plug |
| Operating Humidity | 35 to 85% RH |
| Operating Temperature | 32 to 140°F |
| Ingress Protection | IP 44 |
| Fan Bearings | Dual Ball |
| Mounting Positions | Horizontal or Vertical |
| L10 Life Expectancy | 67,000 Hours |
| CE Certification (Whole Product) |
 PDF |
| ETL Cert. (Whole Product) |
PDF |
| RoHS Cert. (Whole Product) |
PDF |
| SAA Cert. (Whole Product) |
PDF |
| IC Cert. (Whole Product) |
PDF |
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