---
product_id: 228868320
title: "AC Infinity 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: "€ 217.18"
currency: EUR
in_stock: true
reviews_count: 13
category: "Ac Infinity"
url: https://www.desertcart.pt/products/228868320-ac-infinity-cloudline-s4-quiet-100mm-inline-duct-fan-speed
store_origin: PT
region: Portugal
---

# 205 CFM airflow 28 dBA ultra-quiet 8-speed PWM controller AC Infinity 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:** € 217.18
**Availability:** ✅ In Stock

## Summary

> 💨 Quietly powerful airflow that keeps your space fresh and your vibe on point.

## Quick Answers

- **What is this?** AC Infinity 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?** € 217.18 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/228868320-ac-infinity-cloudline-s4-quiet-100mm-inline-duct-fan-speed)

## 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 discreet ventilation without the noise.
- • **Energy-Smart Efficiency:** EC motor combined with mixed flow design delivers maximum airflow with minimal energy consumption.
- • **Plug & Play Installation:** Comes complete with all mounting hardware and a UK-compatible Type-G power plug for hassle-free setup.
- • **Precision Airflow Control:** 8-speed PWM manual controller lets you tailor ventilation exactly to your environment’s needs.
- • **Versatile Ventilation Solution:** Ideal for grow tents, hydroponics, AV racks, and room heating/cooling—boost your air quality effortlessly.

## Overview

The AC Infinity CLOUDLINE S4 is a 4-inch inline duct fan engineered for ultra-quiet, energy-efficient ventilation. Featuring a high-velocity 205 CFM airflow, an 8-speed PWM controller, and dual ball bearings, it’s designed to optimize air circulation in grow tents, hydroponic setups, AV racks, and home heating/cooling systems. With a noise level of just 28 dBA and a complete installation kit including a UK Type-G plug, it offers professional-grade performance with easy setup.

## 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: Quality product. - Quality product. Does the job it's meant to very nicely
Review: Quite and the remote control is really excellent. - I replaced a built in fan in my kitchen extractor unit (failed motor) by mounting this unit in-line in the extract duct. The remote lead was long enough for me to mount the remote in my old unit and yet have the fan mounted well away. I mounted the fan on wires thus reducing any transmitted running noise (I would not expect much anyway as such a smooth running motor). The level of extraction is variable and perfect for the application. Excellent product 10/10. Fully recommend.

## 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 |
| Best Sellers Rank | 22,422 in Garden ( See Top 100 in Garden ) 16 in Hydroponic Ventilation Equipment |
| Brand | AC Infinity |
| Colour | Blackone |
| Customer Reviews | 4.7 4.7 out of 5 stars (11,495) |
| Date First Available | 21 Nov. 2018 |
| Energy Efficiency Class | A+ to G |
| Item Weight | 2.56 kg |
| Model Number | AI-CLS4 |
| Noise Level | 28 Decibels |
| Power / Wattage | 21 watts |
| Product Dimensions | 9 x 19 x 30 cm; 2.56 kg |
| Special Features | High Velocity, Waterproof |
| Voltage | 240 Volts |

## 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

![AC Infinity 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

### ⭐⭐⭐⭐⭐ Quality product.
*by C***G on 1 September 2025*

Quality product. Does the job it's meant to very nicely

### ⭐⭐⭐⭐⭐ Quite and the remote control is really excellent.
*by A***R on 21 March 2022*

I replaced a built in fan in my kitchen extractor unit (failed motor) by mounting this unit in-line in the extract duct. The remote lead was long enough for me to mount the remote in my old unit and yet have the fan mounted well away. I mounted the fan on wires thus reducing any transmitted running noise (I would not expect much anyway as such a smooth running motor). The level of extraction is variable and perfect for the application. Excellent product 10/10. Fully recommend.

### ⭐⭐⭐⭐⭐ Brilliant
*by C***R on 7 February 2021*

For me the ac infinity fans were a game changer, got my environment dialled in just how I need it and with ease to, I purchased an s6 and a t4 reasonably priced I might add, they work perfectly together! These fans are great quality and I was even more pleased when they already came with a connector attached to a U.K. plug! Overall 10 out of 10 for these fans, hats off to AC infinity, they’re so quiet and just a quality product, I will never use another make again, if you’re thinking about buying one just do it, you will not be disappointed

## 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 Portugal*
*Store origin: PT*
*Last updated: 2026-03-17*