--- 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: "£142.70" currency: GBP in_stock: true reviews_count: 13 category: "Ac Infinity" url: https://www.desertcart.co.uk/products/228868320-cloudline-s4-quiet-100mm-inline-duct-fan-with-speed-controller store_origin: GB region: United Kingdom --- # 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:** £142.70 **Availability:** ✅ In Stock ## Summary > 💨 Quietly dominate your airspace with precision and power. ## 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?** £142.70 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/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 - • **Built to Last:** Durable IP44-rated design with dual ball bearings ensures 67,000 hours of reliable, dust- and water-resistant operation. - • **Whisper-Quiet Power:** Experience powerful 205 CFM airflow at a barely-there 28 dBA noise level—your secret to stealthy ventilation. - • **Smart Automation Ready:** Seamlessly integrate with AC Infinity’s app and UIS controllers for climate-triggered automation and real-time environmental insights. - • **Precision Speed Control:** Fine-tune your environment with 8-speed PWM manual control for tailored airflow that matches your exact needs. - • **Effortless Installation & Maintenance:** Includes all mounting hardware plus a removable motor box for quick cleaning—setup and upkeep made simple. ## Overview The AC Infinity CLOUDLINE S4 is a 4-inch inline duct fan delivering 205 CFM airflow at an ultra-quiet 28 dBA noise level. Featuring an 8-speed PWM-controlled brushless motor and dual ball bearings, it offers durable, energy-efficient ventilation ideal for grow tents, hydroponics, and HVAC applications. IP44-rated for dust and water resistance, it includes all mounting hardware and supports smart automation via AC Infinity’s app and UIS controllers for advanced environmental control. ## Description Product Description Intelligent Precision Ventilation Improve your air exchange while maintaining a quiet and energy-efficient performance. Exhaust odors and effectively strengthen airflow to support your ideal environment. Durable Build IP-44 rated to block dust and liquid for long-lasting use while withstanding extreme temperatures. Durable Build IP-44 rated to block dust and liquid for long-lasting use while withstanding extreme temperatures. Omnidirectional Mounting Dual ball bearings allow for mounting in any direction and feature an estimated 67,000 hour lifespan. Omnidirectional Mounting Dual ball bearings allow for mounting in any direction and feature an estimated 67,000 hour lifespan. Easy to Clean Removable motor box makes maintenance easy, enabling you to completely dust or wipe down stator blades. Easy to Clean Removable motor box makes maintenance easy, enabling you to completely dust or wipe down stator blades. Secure Placement Included mounting hardware and hanging straps provide multiple safe and stable installation options. Secure Placement Included mounting hardware and hanging straps provide multiple safe and stable installation options. Easy Environmental Automation Innovative Ventilation Connect this duct fan to CONTROLLER 69 or later (sold separately) and download the AC Infinity app to access custom activation using climate triggers, grow cycles, scheduling, and automation programming. Advance Programming Create automation for your devices to systematically manage your grow tent environment. Set customizable alerts that can trigger to almost any event. Greater Environmental Insight Interactive graph intuitively displays temperature, humidity, and VPD data. Input target figures to help your grow tent approach and maintain your ideal environment. Active Monitoring Stay on top of what's happening in your grow space using alerts and notifications so you can quickly counteract any environmental spikes. UIS Lighting Adapters Use a UIS controller with this adapter to control other brands' grow lights that use RJ11 or RJ12 connection ports. UIS Lighting Adapters Use a UIS controller with this adapter to control other brands' grow lights that use RJ11 or RJ12 connection ports. UIS Control Plug Use a UIS controller with this smart plug to control outlet-powered devices such as heaters, lights, dehumidifiers, and air conditioners. UIS Control Plug Use a UIS controller with this smart plug to control outlet-powered devices such as heaters, lights, dehumidifiers, and air conditioners. CLOUDLINE Series Connect a UIS controller to Inline Duct Fans to apply cycling, scheduling, and dynamic environmental triggers with transitions. CLOUDLINE Series Connect a UIS controller to Inline Duct Fans to apply cycling, scheduling, and dynamic environmental triggers with transitions. CLOUDRAY Series Use a UIS controller with Circulation Clip-on Fans to apply grow cycles, scheduling, and dynamic environmental triggers with transitions. CLOUDRAY Series Use a UIS controller with Circulation Clip-on Fans to apply grow cycles, scheduling, and dynamic environmental triggers with transitions. IONFRAME Series Pair a UIS controller with Bar Style LED Grow Lights to apply grow cycles and scheduling. IONFRAME Series Pair a UIS controller with Bar Style LED Grow Lights to apply grow cycles and scheduling. THERMOFORGE Series Link a UIS controller with VPD Heaters to apply climate triggers, cycling, scheduling, and alerts. THERMOFORGE Series Link a UIS controller with VPD Heaters to apply climate triggers, cycling, scheduling, and alerts. Review: working well and quiet - very happy with this extractor so far working well and quiet .. 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. ## 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 | 8,443 in Garden ( See Top 100 in Garden ) 5 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 4,032 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 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 | | Smart Home Compatibility | Smart Home Compatible | | 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) ![CLOUDLINE S4, Quiet 100mm Inline Duct Fan with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, 4-Inch - Image 2](https://m.media-amazon.com/images/I/710Ve2cSvHL.jpg) ![CLOUDLINE S4, Quiet 100mm Inline Duct Fan with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, 4-Inch - Image 3](https://m.media-amazon.com/images/I/61B4-3IcMGL.jpg) ![CLOUDLINE S4, Quiet 100mm Inline Duct Fan with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, 4-Inch - Image 4](https://m.media-amazon.com/images/I/61JB-h-g2xL.jpg) ![CLOUDLINE S4, Quiet 100mm Inline Duct Fan with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, 4-Inch - Image 5](https://m.media-amazon.com/images/I/71mdKRfbTCL.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 .. ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ 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 ## 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.co.uk/products/228868320-cloudline-s4-quiet-100mm-inline-duct-fan-with-speed-controller](https://www.desertcart.co.uk/products/228868320-cloudline-s4-quiet-100mm-inline-duct-fan-with-speed-controller) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-07-21*