---
product_id: 228868320
title: "CLOUDLINE S4, Quiet 100mm Inline Duct Fan | with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, 4-Inch"
brand: "ac infinity"
price: "€ 185.94"
currency: EUR
in_stock: true
reviews_count: 13
category: "Ac Infinity"
url: https://www.desertcart.it/products/228868320-cloudline-s4-quiet-100mm-inline-duct-fan-with-speed-controller
store_origin: IT
region: Italy
---

# 205 CFM airflow 28 dBA ultra-quiet 8-speed PWM control CLOUDLINE S4, Quiet 100mm Inline Duct Fan | with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, 4-Inch

**Brand:** ac infinity
**Price:** € 185.94
**Availability:** ✅ In Stock

## Summary

> 💨 Elevate your air game—quiet, powerful, and in total control.

## Quick Answers

- **What is this?** CLOUDLINE S4, Quiet 100mm Inline Duct Fan | with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, 4-Inch by ac infinity
- **How much does it cost?** € 185.94 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/228868320-cloudline-s4-quiet-100mm-inline-duct-fan-with-speed-controller)

## 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 airflow at just 28 dBA—perfect for focused work or relaxation without distraction.
- • **Energy-Smart Efficiency:** Brushless EC motor delivers high velocity airflow with minimal energy consumption—eco-friendly and cost-effective.
- • **Pro-Grade Build Quality:** Durable polypropylene blades and powder-coated finish ensure long-lasting performance in any indoor setting.
- • **Precision Airflow Control:** 8-speed manual PWM controller lets you tailor ventilation exactly to your environment’s needs.
- • **Versatile Mounting Options:** Wall or ceiling mount ready with all hardware included, seamlessly integrating into your space.

## Overview

The AC Infinity CLOUDLINE S4 is a 4-inch inline duct fan engineered for superior ventilation with 205 CFM airflow and whisper-quiet 28 dBA noise levels. Featuring an 8-speed PWM-controlled brushless motor, it offers precise airflow management while maintaining energy efficiency. Designed for versatile indoor use including grow tents, AV racks, and studios, it comes complete with mounting hardware and a power adapter compatible with UK voltage standards.

## Description

AC Infinity CLOUDLINE S4, Quiet 100mm Inline Duct Fan | with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, 4-Inch : desertcart.co.uk: DIY & Tools

Review: working well and quiet - very happy with this extractor so far working well and quiet ..
Review: Works well at bringing fresh air inside - Really good using this for a studio room to pull fresh air inside as it gets so hot and stuffy inside with the sound dampening foam on walls and recording equipment and so far really good and does the job

## Features

- Designed to ventilate grow tents, transfer heating/cooling to rooms, circulate air, exhaust odors, and cool AV racks.
- Features an 8-speed manual controller utilizing PWM. See T-Series for temperature and humidity controls.
- Mixed flow design combined with a PWM-controlled EC-motor for a truly quiet and energy efficient performance.
- Kit also includes corded AC power adapter, installation manual, and all necessary mounting hardware.
- Duct Size: 4” | Dimensions: 6.9 x 11.9 x 7.4 in. | Airflow: 205 CFM | Noise: 28 dBA | Bearings: Dual Ball
- This product is equipped with a Type-G power plug and is compatible with the voltage commonly used in the United Kingdom.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07JB292JC |
| Air Flow Capacity | 205 Cubic Feet Per Minute |
| Best Sellers Rank | 8,587 in Garden ( See Top 100 in Garden ) 3 in Hydroponic Ventilation Equipment |
| Blade Length | 7.4 Inches |
| Blade Material | Plastic |
| Brand | AC Infinity |
| Brand Name | AC Infinity |
| Collection Name | Channel Fans |
| Colour | Pro Speed Controller for S4 |
| Control Method | Push Button |
| Controller Type | manual |
| Country of Origin | China |
| Customer Reviews | 4.7 out of 5 stars 4,047 Reviews |
| Electric Fan Design | Exhaust Fan |
| Electric fan design | Exhaust Fan |
| Finish Type | Powder Coated |
| Global Trade Identification Number | 00819137020290 |
| Included Components | Cord |
| Indoor Outdoor Usage | Indoor |
| Installation Type | wall/ceiling mounted |
| Is Product Cordless | No |
| Item Dimensions D x W x H | 17.5D x 18.8W x 30.2H centimetres |
| Item Weight | 2.61 Kilograms |
| Manufacturer | AC Infinity |
| Material | Polypropylene |
| Model Name | CLOUDLINE S4 |
| Model Number | CTR62A |
| Motor Type | Brushless |
| Mounting Type | Wall Mount/Ceiling Mount |
| Noise Level | 28 Decibels |
| Number of Blades | 10 |
| Number of Packs | 1 |
| Number of Power Levels | 8 |
| Number of Speeds | 8 |
| Part Number | AI-CLS4 |
| Power Source | Power Adapter |
| Power source | Power Adapter |
| Product dimensions | 17.5D x 18.8W x 30.2H centimetres |
| Recommended Uses For Product | Air Circulation, Cooling, Exhausting |
| Room Type | Kitchen |
| Size | 4 inch |
| Special Features | High Velocity, Waterproof |
| Speed | 2800 RPM |
| Standby Power Shutoff | Alta eficiência |
| Style | Industrial |
| UPC | 819137020290 |
| Unit Count | 1.0 count |
| Voltage | 240 Volts (AC) |
| Wattage | 21 watts |

## Product Details

- **Brand:** AC Infinity
- **Colour:** Blackone
- **Electric fan design:** Exhaust Fan
- **Mounting type:** Wall Mount/Ceiling Mount
- **Power source:** Power Adapter
- **Product dimensions:** 17.5D x 18.8W x 30.2H centimetres
- **Recommended uses for product:** Air Circulation, Cooling, Exhausting
- **Room type:** Kitchen
- **Special feature:** High Velocity, Waterproof
- **Style:** Industrial

## Images

![CLOUDLINE S4, Quiet 100mm Inline Duct Fan | with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, 4-Inch - Image 1](https://m.media-amazon.com/images/I/616TVs-68xL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## 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

### ⭐⭐⭐⭐⭐ working well and quiet
*by P***. on 2 April 2026*

very happy with this extractor so far working well and quiet ..

### ⭐⭐⭐⭐⭐ Works well at bringing fresh air inside
*by C***Y on 8 May 2026*

Really good using this for a studio room to pull fresh air inside as it gets so hot and stuffy inside with the sound dampening foam on walls and recording equipment and so far really good and does the job

### ⭐⭐⭐⭐⭐ Fast and almost silent ❤
*by D***D on 13 June 2021*

It does its job, obviously full speed it sounds like a turbo slightly but if you run it a few notices under full power then it's almost silent, I would reccomend this to anyone! Perfect buy, easy to install and away you go!

## 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
- AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 8-Feet Long for Heating Cooling Ventilation and Exhaust
- AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 25-Feet Long for Heating Cooling Ventilation and Exhaust

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-08-21*