AC Infinity CLOUDLINE PRO S4, Quiet 4” Inline Duct Fan with Speed Controller – EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

AC Infinity CLOUDLINE PRO S4, Quiet 4” Inline Duct Fan with Speed Controller – EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

Q: What is the max temp of use for this fan? i see you said 240f, but all other manufacturers with plastic impellers say max temp 140f. are you certain?

Always stay a minimum of 25% below specified temp. At minimum they can warp and and motor performance would be affected

Q: If powered from a switched outlet, will it remember the last speed setting or does that require constant power?

Morning RS, the S4 will not remember your fan speed. It’s a manual setting only. I also have a T4 with a smart controller and it does remember and can be set to auto for heat and humidity. The T4 is for auto exhaust and S4 is intake. If it is your only fan go with the T4. Also, if you have more than 200sf to ventilate go directly to the T6. The are very quiet which is important as my room is under a bedroom. Hope this helps.

Q: How well does this work with a carbon filter?

I have a 350 Cfm Coco/Carbon Fiber filter that I place on the Exit side of my application. I have tested the filter on both the intake and the exit. I found these units Push much better than they Pull. I do have to increase the power by 10% when I install the exit filter, but it's not really an issue in my application.

4.7/5

Product ID: 551898487

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Details

Brand
AC Infinity
Colour
Black
Electric fan design
Exhaust Fan
Power Source
Corded
Style
Modern
Product Dimensions
17.5D x 18.8W

⚡21W energy-efficient EC motor

🔇28 dBA ultra-quiet

🌬️205 CFM airflow

Frequently Bought Together

AC Infinity CLOUDLINE PRO S4, Quiet 4” Inline Duct Fan with Speed Controller – EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

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Description

🌪️ Elevate your airflow game—quiet, smart, and unstoppable.

WHISPER QUIET POWER - Experience powerful airflow at just 28 dBA—perfect for focused work or stealthy grow tent ventilation.
ENERGY SMART EC MOTOR - PWM-controlled EC motor delivers maximum airflow with minimal energy use and heat generation.
PLUG PLAY VERSATILITY - Compact 4” duct size and included remote make installation and control seamless for hydroponics, AV racks, or home cooling.
PRECISION SPEED CONTROL - 10-speed wired controller plus UIS compatibility lets you tailor airflow exactly to your environment’s needs.
ENGINEERED FOR RESISTANCE - Mixed flow design with stator blades and hydrodynamic wind circles ensures consistent performance even in high-resistance duct setups.

The AC Infinity CLOUDLINE PRO S4 is a 4-inch inline duct fan engineered for quiet, energy-efficient ventilation with a powerful 205 CFM airflow. Featuring a PWM-controlled EC motor, 10-speed wired controller, and advanced mixed flow blade design, it excels in grow tents, HVAC boosting, and AV cooling applications. Operating at just 28 dBA and 21 watts, it balances performance with whisper-quiet operation, making it the go-to choice for professionals demanding precision airflow control.

Specifications

Brand	AC Infinity
Colour	Black
Electric fan design	Exhaust Fan
Power Source	Corded Electric
Style	Modern
Product Dimensions	17.5D x 18.8W x 30.2H Centimeters
Room Type	Kitchen
Special Feature	Bladeless
Recommended Uses For Product	Cooling, Air Circulation
Noise Level	28 dB
Wattage	21 Watts
Finish Type	Matte
Air Flow Capacity	205 Cubic Feet Per Minute
Blade Length	7.4 Inches
Voltage	240 Volts
Switch Type	Push Button
Included Components	Remote, Cord
Indoor/Outdoor Usage	Indoor
Control Method	App
Manufacturer	AC Infinity
Country of Origin	USA
Model number	CLOUDLINE S4
Item Weight	2 kg 560 g
Item model number	CLOUDLINE S4
Cable Length	144 Inches
Cooling type	Air
Maximum Rotational Speed	2800 RPM
Type of connector	4-Pin
Compatible Device	Transmission Coolers
Are batteries included?	No

Have a Question? See What Others Asked

What is the max temp of use for this fan? i see you said 240f, but all other manufacturers with plastic impellers say max temp 140f. are you certain?

If powered from a switched outlet, will it remember the last speed setting or does that require constant power?

How well does this work with a carbon filter?

What is the best way to connect this to 12 or 24 volt system?

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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