---
product_id: 725708395
title: "AC Infinity CLOUDLINE PRO S4 Silent 4\" Inline Duct Fan with Speed Controller Heating and Cooling Fan Promotes Cooling Growing Tent Hydroponics"
brand: "ac infinity"
price: "€ 127.39"
currency: EUR
in_stock: false
reviews_count: 6
url: https://www.desertcart.gr/products/725708395-ac-infinity-cloudline-pro-s4-silent-4-inline-duct-fan
store_origin: GR
region: Greece
---

# 28 dBA ultra-quiet 205 CFM airflow 10-speed PWM controller AC Infinity CLOUDLINE PRO S4 Silent 4" Inline Duct Fan with Speed Controller Heating and Cooling Fan Promotes Cooling Growing Tent Hydroponics

**Brand:** ac infinity
**Price:** € 127.39
**Availability:** ❌ Out of Stock

## Summary

> 🌿 Silent power, total control—breathe easy, grow smarter.

## Quick Answers

- **What is this?** AC Infinity CLOUDLINE PRO S4 Silent 4" Inline Duct Fan with Speed Controller Heating and Cooling Fan Promotes Cooling Growing Tent Hydroponics by ac infinity
- **How much does it cost?** € 127.39 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/725708395-ac-infinity-cloudline-pro-s4-silent-4-inline-duct-fan)

## Best For

- ac infinity enthusiasts

## Why This Product

- Trusted ac infinity brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Whisper-Quiet Power:** Experience powerful 205 CFM airflow with barely-there 28 dBA noise—perfect for focused work or stealthy grow tents.
- • **Plug & Play Installation:** Comes with all screws, straps, and a detailed manual for hassle-free setup in any scenario—no extra trips to the hardware store.
- • **Versatile Climate Solution:** Ideal for hydroponics, AV racks, or any space needing reliable cooling, odor control, and air circulation with professional-grade performance.
- • **Energy-Smart Mixed-Flow Motor:** EC-driven motor blends efficiency and silence, cutting energy costs while keeping your environment perfectly ventilated.
- • **Precision Control at Your Fingertips:** 10-speed PWM manual controller lets you dial in the exact ventilation level you need, from a gentle breeze to full throttle.

## Overview

The AC Infinity CLOUDLINE PRO S4 is a 4-inch inline duct fan delivering 205 CFM airflow at an ultra-quiet 28 dBA noise level. Equipped with a 10-speed PWM controller and an energy-efficient EC mixed-flow motor, it offers precise ventilation control ideal for hydroponic grow tents, AV racks, and climate-sensitive spaces. The kit includes all necessary hardware and a comprehensive manual for easy installation, making it a top choice for professionals seeking silent, efficient air circulation.

## Description

desertcart.co.jp: AC Infinity CLOUDLINE PRO S4 Silent 4" Inline Duct Fan with Speed Controller Heating and Cooling Fan Promotes Cooling Growing Tent Hydroponics : Computers

Review: パワー感は、どうかな？ と、いった感じです。
Review: -It comes with the right power plug for EU(for 220v), even if the original images of the product don't show it(i think they are old), it looks like in the past wasn't the case because of others reviews, but now it comes with the right power plug -The cables are long, i mean, looong(power and controller cables), 2,5 meters for uis cable and 2,3 meters for power cable -I took photos of the manual only so you can see: +installation in different scenarios +cleaning +you can see its an actual useful manual +and the warranty part makes me feel like they really care -It comes with every screw, strap and little thing you need to install it in all possible scenarios(see the photos) -If you want to get noise test you can go to desertcart.com(eeuu version) and see the videos on the reviews, my phone mic is trash so I wont do a noise test, but I can tell you that at level 1(it has 10 levels) makes 0 noise, at level 5 its the maximum I can deal with(and need) and above looks like its for scenarios where you really need to ventilate and dont care about the noise, so it gives you options, from 3 to 5 in my case is enough(I will never go above most likely) -I like the philosophy of "its yours, you have the control: you can fully open it(normal screws), you have all these intensity levels(from 1-"it barely moves" 2-"quiet and performant" to 3-"hold on to something, this airplane its gonna liftoff", you have a detailed manual, you have long cables, in the box you have all needed screws and little things" -btw the fan is exposed...not a bad thing, its made for people that think a bit

## Features

- Growing tents provide quiet ventilation, heating/cooling effect, and also effective for air circulation, odor exhaust and cooling AV racks
- Equipped with a 10-speed manual controller that utilizes PWM. For temperature and moisture control, please refer to the T Series
- Mixed-flow (combination of different airflow) and EC-driven motor provide truly quiet and energy efficient performance
- This kit includes an AC power adapter, instruction manual, and all other necessary hardware for installation
- Duct Diameter: 4" | Dimensions: 6.9 x 11.9 x 7.4" | Airflow: 205 CFM | Noise: 28 dBA | Bearing: Dual Ball

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07JB292JC |
| Amazon Bestseller | #117,835 in Computers ( See Top 100 in Computers ) #987 in Computer Case Fans |
| Batteries Included | No |
| Batteries Required | No |
| Brand Name | AC Infinity |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,602) |
| Date First Available | November 21, 2018 |
| Model Number | CLOUDLINE S4 |
| Noise Level | 28 Decibels |
| Package Dimensions | 34.5 x 26.5 x 24.6 cm |
| Package Weight | 2.56 Kilograms |
| Power Source | Ac |
| Special Features | Quiet |
| Voltage | 240 Volts |
| Wattage | 21 W |

## Product Details

- **Brand:** AC Infinity
- **Controller Type:** Pull Chain Control
- **Electric fan design:** Exhaust Fan
- **Mounting Type:** Flush Mount
- **Noise Level:** 28 Decibels
- **Number of Speeds:** 8
- **Power Source:** Ac
- **Room Type:** Bathroom
- **Special Feature:** Quiet
- **Style:** Industrial

## Images

![AC Infinity CLOUDLINE PRO S4 Silent 4" Inline Duct Fan with Speed Controller Heating and Cooling Fan Promotes Cooling Growing Tent Hydroponics - Image 1](https://m.media-amazon.com/images/I/41+b3T363AL.jpg)
![AC Infinity CLOUDLINE PRO S4 Silent 4" Inline Duct Fan with Speed Controller Heating and Cooling Fan Promotes Cooling Growing Tent Hydroponics - Image 2](https://m.media-amazon.com/images/I/41AIYSu9x4L.jpg)
![AC Infinity CLOUDLINE PRO S4 Silent 4" Inline Duct Fan with Speed Controller Heating and Cooling Fan Promotes Cooling Growing Tent Hydroponics - Image 3](https://m.media-amazon.com/images/I/41sInQFPX1L.jpg)
![AC Infinity CLOUDLINE PRO S4 Silent 4" Inline Duct Fan with Speed Controller Heating and Cooling Fan Promotes Cooling Growing Tent Hydroponics - Image 4](https://m.media-amazon.com/images/I/51OD2CyMGiL.jpg)
![AC Infinity CLOUDLINE PRO S4 Silent 4" Inline Duct Fan with Speed Controller Heating and Cooling Fan Promotes Cooling Growing Tent Hydroponics - Image 5](https://m.media-amazon.com/images/I/51akpmrcoyL.jpg)

## Questions & Answers

**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?**
A: 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?**
A: 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?**
A: 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.

**Q: What is the best way to connect this to 12 or 24 volt system?**
A: AC infinity, also looking for DC system compatibility off grid use with solar and lithium battery banks.  Want to avoid DC->AC->DC to save wattage.  I like that your fan design is efficient, but not in my case as the conversion costs wattage/heat.  Ended up buying Atwood unit which does 12/24v which is no where near as nice a fan as this...

## Customer Reviews

### ⭐⭐⭐⭐ Review
*by D***N on November 29, 2021*

パワー感は、どうかな？ と、いった感じです。

### ⭐⭐⭐⭐⭐ Review
*by A***N on December 7, 2025*

-It comes with the right power plug for EU(for 220v), even if the original images of the product don't show it(i think they are old), it looks like in the past wasn't the case because of others reviews, but now it comes with the right power plug -The cables are long, i mean, looong(power and controller cables), 2,5 meters for uis cable and 2,3 meters for power cable -I took photos of the manual only so you can see: +installation in different scenarios +cleaning +you can see its an actual useful manual +and the warranty part makes me feel like they really care -It comes with every screw, strap and little thing you need to install it in all possible scenarios(see the photos) -If you want to get noise test you can go to amazon.com(eeuu version) and see the videos on the reviews, my phone mic is trash so I wont do a noise test, but I can tell you that at level 1(it has 10 levels) makes 0 noise, at level 5 its the maximum I can deal with(and need) and above looks like its for scenarios where you really need to ventilate and dont care about the noise, so it gives you options, from 3 to 5 in my case is enough(I will never go above most likely) -I like the philosophy of "its yours, you have the control: you can fully open it(normal screws), you have all these intensity levels(from 1-"it barely moves" 2-"quiet and performant" to 3-"hold on to something, this airplane its gonna liftoff", you have a detailed manual, you have long cables, in the box you have all needed screws and little things" -btw the fan is exposed...not a bad thing, its made for people that think a bit

### ⭐⭐⭐⭐⭐ Review
*by L***S on December 26, 2024*

Me llegó a tiempo, excelente extractor de aire, viene con todo lo necesario para su instalación y con folleto, volveré a comprar sin duda, gracias AMZN

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-03-05*