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.

4.6/5

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

🔇28 dBA noise - whisper-quiet operation

⚙️8-speed PWM EC motor - precise speed control

🌬️205 CFM airflow - powerful circulation

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

🌿 Quiet power meets smart control — breathe easy, work smarter.

SMART COMPATIBILITY - Seamlessly integrates with AC Infinity’s UIS smart controllers for intelligent programming and remote management—future-proof your ventilation.
BUILT TO LAST ADAPT - Dual ball bearings rated for 67,000 hours and IP44 dust/liquid resistance ensure reliable operation in any environment, mounted any way you like.
PRECISION SPEED CONTROL - 8-speed PWM-controlled EC motor lets you dial in airflow exactly how you want it, balancing performance and silence effortlessly.
WHISPER QUIET POWERHOUSE - Experience robust 205 CFM airflow with ultra-low 28 dBA noise—perfect for focused workspaces and stealthy grow tents.
SLEEK FUNCTIONAL DESIGN - Compact 4” inline fan with mixed flow tech delivers high static pressure airflow in tight spaces, keeping your AV racks, grow tents, or rooms perfectly ventilated.

The AC Infinity CLOUDLINE PRO S4 is a premium 4-inch inline duct fan engineered for whisper-quiet, energy-efficient ventilation. Featuring a PWM-controlled EC motor with 8-speed settings, it delivers 205 CFM airflow at just 28 dBA noise. Its mixed flow design and dual ball bearings ensure high static pressure performance and long-lasting durability. Ideal for grow tents, AV racks, and indoor air circulation, it includes a wired speed controller and supports smart integration for advanced environmental 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	Air Circulation, Cooling
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	Cord, Remote
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

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

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

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TrustScore 4.5 | 7,300+ reviews

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The product quality is outstanding. Exactly what I needed for my work.

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