--- 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: "€ 199.76" currency: EUR in_stock: true reviews_count: 13 category: "Ac Infinity" url: https://www.desertcart.at/products/228868320-cloudline-s4-quiet-100mm-inline-duct-fan-with-speed-controller store_origin: AT region: Austria --- # 205 CFM airflow 28 dBA ultra-quiet 8-speed PWM controller 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:** € 199.76 **Availability:** ✅ In Stock ## Summary > 💨 Quiet power, total control—breathe smarter, live better. ## 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?** € 199.76 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/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—your secret weapon for stealthy ventilation. - • **Complete Installation Kit:** Includes power adapter, mounting hardware, and manual—ready to install and elevate your space instantly. - • **Precision Airflow Control:** 8-speed manual PWM controller lets you dial in the perfect breeze for any environment. - • **Energy-Efficient Mixed Flow Motor:** Advanced EC motor design delivers high velocity airflow with minimal energy consumption. - • **Versatile 4-Inch Duct Compatibility:** Seamlessly fits standard 4-inch ducts for effortless integration in grow tents, AV racks, or home HVAC. ## Overview The AC Infinity CLOUDLINE S4 is a 4-inch inline duct fan engineered for ultra-quiet, energy-efficient ventilation. With a robust 205 CFM airflow and an 8-speed PWM controller, it offers precise air circulation for grow tents, cooling AV equipment, or boosting heating/cooling systems. Its mixed flow EC motor ensures whisper-quiet operation at just 28 dBA, while the included installation kit makes setup effortless. Ideal for professionals seeking reliable, customizable airflow solutions with minimal noise disruption. ## 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: Amazing! - Brought it to attach to my Glowforge exhaust ducting. It is such an improvement on the noise level previously. I’ve mounted it on the wall, and that was easy enough to manage too. Would recommend it to anyone wanting something for a similar reason. Review: Ac - Works well ## 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 | 22,126 in Garden ( See Top 100 in Garden ) 6 in Hydroponic Ventilation Equipment | | Blade Length | 7.4 Inches | | Blade Material | Plastic | | Brand Name | AC Infinity | | Collection Name | Channel Fans | | Colour | Blackone | | Control Method | Push Button | | Controller Type | manual | | Country of Origin | China | | Customer Reviews | 4.7 4.7 out of 5 stars (3,902) | | Electric Fan Design | Exhaust Fan | | Finish Type | Powder Coated | | Global Trade Identification Number | 00819137020290 | | Included Components | Cord | | Indoor Outdoor Usage | Indoor | | 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 | Polycarbonate | | Model Name | CLOUDLINE S4 | | Model Number | CLOUDLINE S4 | | Mounting Type | Wall Mount/Ceiling Mount | | Noise Level | 28 Decibels | | Number of Blades | 10 | | Number of Power Levels | 8 | | Number of Speeds | 8 | | Power Source | Power Adapter | | Recommended Uses For Product | Air Circulation, Cooling, Exhausting | | Room Type | Kitchen | | 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 | | 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 ### ⭐⭐⭐⭐⭐ Amazing! *by 0***E on 14 October 2022* Brought it to attach to my Glowforge exhaust ducting. It is such an improvement on the noise level previously. I’ve mounted it on the wall, and that was easy enough to manage too. Would recommend it to anyone wanting something for a similar reason. ### ⭐⭐⭐⭐⭐ Ac *by W***D on 22 November 2025* Works well ### ⭐⭐⭐⭐⭐ working well and quiet *by P***. on 2 April 2026* very happy with this extractor so far working well and quiet .. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.at/products/228868320-cloudline-s4-quiet-100mm-inline-duct-fan-with-speed-controller](https://www.desertcart.at/products/228868320-cloudline-s4-quiet-100mm-inline-duct-fan-with-speed-controller) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-04-22*