---
product_id: 89275796
title: "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"
brand: "ac infinity"
price: "€ 232.06"
currency: EUR
in_stock: true
category: "Ac Infinity"
url: https://www.desertcart.it/products/89275796-ac-infinity-cloudline-pro-s4-quiet-4-inline-duct-fan
store_origin: IT
region: Italy
---

# 212 CFM airflow 27 dBA ultra-quiet 10-speed precision control 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

**Brand:** ac infinity
**Price:** € 232.06
**Availability:** ✅ In Stock

## Summary

> 🌿 Quiet power for your green empire — breathe easy, grow smarter!

## Quick Answers

- **What is this?** 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 by ac infinity
- **How much does it cost?** € 232.06 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/89275796-ac-infinity-cloudline-pro-s4-quiet-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

- • **Compact Yet Powerful:** 4-inch duct size with 212 CFM airflow fits seamlessly into tight grow spaces while maximizing ventilation.
- • **IP65-Rated Durability:** Built to resist moisture, dust, and debris for reliable performance in humid environments.
- • **Precision Airflow Management:** 10-level speed controller lets you dial in exact ventilation to prevent CO2 buildup.
- • **Whisper-Quiet Climate Control:** Maintain perfect grow tent conditions without the noise distractions.
- • **Energy-Efficient Brushless Motor:** PWM-controlled EC motor delivers powerful airflow with minimal power consumption.

## Overview

The AC Infinity CLOUDLINE H4 is a 4-inch inline duct fan engineered for grow tents and mushroom cultivation. Featuring a brushless EC motor with PWM control, it delivers 212 CFM airflow at an ultra-quiet 27 dBA noise level. Its IP65 rating ensures durability in high-humidity environments, while the included 10-speed controller offers precise ventilation management to optimize indoor climate and prevent CO2 buildup.

## Description

desertcart.com: AC Infinity CLOUDLINE H4, Quiet 4” Inline Duct Fan with Speed Controller, IP65-Rated Ventilation Exhaust Fan in Grow Tents, Mushroom Fruiting Chambers for Propagation and Fungiculture | Humidity Proof IP65-Rated Ventilation Exhaust Fan in Grow Tents, Mushroom Fruiting Chambers for Propagation and Fungiculture : Patio, Lawn & Garden

## Features

- Specially designed for mushroom growing to quietly ventilate grow spaces and help control indoor climate levels.
- IP65-rated to ensure performance in high-humidity spaces while resisting dust, debris, and moisture.
- Includes a fan speed controller with precise 10-level control for exact airflow and CO2 buildup prevention.
- EC motor with PWM control enables quiet and energy-efficient performance for consistent fresh air exchange.
- Duct Size: 4" | Dimensions: 6.9 x 11.9 x 7.4 in. | Airflow: 212 CFM | Noise: 27 dBA | Bearings: Dual Ball

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DHYP3ZQY |
| Air Flow Capacity | 212 cfm |
| Best Sellers Rank | #1,861 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1 in Hydroponic Ventilation Equipment |
| Brand | AC Infinity |
| Brand Name | AC Infinity |
| Collection Name | Specialty Fans |
| Color | IP65 Speed Controller for H4 |
| Control Method | Touch |
| Customer Reviews | 4.5 out of 5 stars 66 Reviews |
| Electric Fan Design | Blower |
| Electric fan design | Blower |
| Finish Type | Powder Coated |
| Included Components | Cord |
| Indoor Outdoor Usage | Indoor |
| Installation Type | Permanent Installation |
| Item Dimensions D x W x H | 6.9"D x 11.9"W x 7.4"H |
| Item Weight | 2.09 kg |
| Manufacturer | AC Infinity |
| Material | Plastic |
| Model Name | CLOUDLINE H4 |
| Model Number | AI-CLH4 |
| Motor Type | Brushless |
| Mounting Type | Downrod Mount |
| Noise Level | 27 db |
| Number of Power Levels | 10 |
| Number of Speeds | 10 |
| Part Number | AI-CLH4 |
| Power Source | AC |
| Product Dimensions | 6.9"D x 11.9"W x 7.4"H |
| Recommended Uses For Product | Inline Duct Fan |
| Room Type | Indoor |
| Size | 4-Inch |
| Special Features | Programmable |
| Speed | 3000 rpm |
| Style | Cloudline H4 |
| UPC | 819137024595 |
| Unit Count | 1 Count |
| Voltage | 100 volts |
| Wattage | 18 watts |

## Product Details

- **Brand:** AC Infinity
- **Color:** Pro Speed Controller for S4
- **Electric fan design:** Exhaust Fan
- **Mounting Type:** Downrod Mount
- **Power Source:** AC
- **Product Dimensions:** 6.9"D x 11.9"W x 7.4"H
- **Recommended Uses For Product:** Inline Duct Fan
- **Room Type:** Indoor
- **Special Feature:** Programmable
- **Style:** Cloudline S4

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/6117XGasixL.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...

## 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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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-08-17*