--- product_id: 449842364 title: "AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan with Temperature Humidity Controller, Bluetooth App - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics" brand: "ac infinity" price: "£231.94" currency: GBP in_stock: true reviews_count: 7 category: "Ac Infinity" url: https://www.desertcart.co.uk/products/449842364-ac-infinity-cloudline-t4-quiet-4-inline-duct-fan-temperature store_origin: GB region: United Kingdom --- # Bluetooth app control 28 dBA ultra-quiet 205 CFM airflow AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan with Temperature Humidity Controller, Bluetooth App - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics **Brand:** ac infinity **Price:** £231.94 **Availability:** ✅ In Stock ## Summary > 🌿 Elevate your airflow game with smart, silent, and sustainable ventilation! ## Quick Answers - **What is this?** AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan with Temperature Humidity Controller, Bluetooth App - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics by ac infinity - **How much does it cost?** £231.94 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/449842364-ac-infinity-cloudline-t4-quiet-4-inline-duct-fan-temperature) ## 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:** Ultra-quiet 28 dBA noise level keeps your space peaceful while maximizing airflow. - • **Smart Climate Control:** Dynamic temperature & humidity programming with app-based remote access for precision ventilation. - • **Effortless Maintenance:** Detachable motor box design for easy cleaning and long-term reliability in any mounting position. - • **Energy-Efficient EC Motor:** PWM-controlled EC motor delivers smooth, low-power operation with 67,000-hour dual ball bearing lifespan. - • **Versatile Ventilation Booster:** Perfect for hydroponic grow rooms, AV cabinets, and heating/cooling air transfer with 4” duct compatibility. ## Overview The AC Infinity CLOUDLINE T4 is a premium 4-inch inline duct fan engineered for quiet, energy-efficient ventilation. Featuring a mixed-flow design and PWM-controlled EC motor, it delivers 205 CFM airflow at just 28 dBA noise. Its smart temperature and humidity controller with Bluetooth app connectivity enables dynamic climate programming and remote monitoring, making it ideal for hydroponic grow rooms, AV cooling, and versatile air circulation needs. ## Description Designed to ventilate hydroponic grow rooms, transfer heating/cooling, cool AV closets, and exhaust odors. Dynamic temperature and humidity programming, with timers, grow cycles, scheduling, minimum speed. Connect with our app via Bluetooth to access advance programs, alarms, notifications, and view climate data. Mixed flow design combined with a PWM-controlled EC-motor for a truly quiet and energy efficient performance. Duct Size: 4” | Dimensions: 6.9 x 11.9 x 7.4 in. | Airflow: 205 CFM | Noise: 28 dBA | Bearings: Dual Ball Product Description A smart inline duct fan designed to quietly ventilate hydroponic grow rooms, boost heating/cooling to rooms, circulate fresh air, exhaust projects, and cool AV closets. Featuring an inline mixed-flow design, the duct fan can maintain airflow even in high static pressure applications. Contains an EC-motor with PWM-control for quiet and energy-efficient performance. The motor box containing the fan’s impeller and blades can be detached from the mounted frame for easy cleaning and maintenance. Includes a smart controller with dynamic climate and time-based programming and can connect to one additional fan. Complete kit includes one duct fan unit, one thermal controller, one corded thermal probe, two duct clamps, installation manual, and all necessary mounting hardware. Smart Controller Features smart programming that not only has basic temperature and humidity triggers, but also allows you to set dynamic fan speeds that would respond based on their changes. Go even further by setting a minimum speed that the fan will run at constantly and would only increase when triggered. Timer, cycle, and schedule modes add custom on-demand activation for a variety of uses. Securely connect with the AC Infinity App via Bluetooth to access your fan remotely, unlock advance programs, set notifications, view historical climate charts, and export CSV data. This controller can connect to two AC Infinity fans with EC Motors including other CLOUDLINE fan sizes, and CLOUDRAY clip-on circulation fans. Quiet and Energy Efficient Design Unlike common duct fans that uses an AC-motor which are loud and unmanageable, this duct fan features an EC-motor that is controlled using PWM (Pulse Width Modulation). This technology enables motors to be able to run smoothly at extremely low RPM speeds without generating additional heat or noise. In addition, the duct fan uses a mixed flow design using a stator blade and dual hydrodynamic wind circles. This gives it a high static pressure rating, enabling it to deliver airflow even in applications where air movement is being restricted. The motor houses dual ball bearings rated at 67,000 hours which allows the duct fan unit to be mounted in any direction. The unit is IP44 rated to be highly resistant to dust and liquids, and performs well even in harsh environments. Applications This quiet duct fan system is popular in a variety of applications including cooling AV equipment rooms, closets, racks, and cabinets. Due to its low noise and advanced control features, it’s also used in various air circulation and ventilation projects including hydroponic grow rooms and tents, exhausting bathrooms and attics, and other installations. Product Identification Manufacturer AC Infinity Inc. Product Name CLOUDLINE T4 Product Model AI-CLT4 UPC Code 854759004785 Product and Mounting Dimensions - Fan Unit Duct Size 4" Total Dimensions 7.40 x 11.93 x 6.93 in. (18.8 x 30.3 x 17.6 cm) Mounting Hole-To-Hole Distance 3.15 x 2.36 in. (8.0 x 6.0 cm) Screw Hole Size Ø 0.197 in. (Ø 0.5 cm) Cord Length to Controller 240 in. (20 feet) Product and Mounting Dimensions - Controller Total Dimensions 5.19 x 2.91 x 1.06 in. (13.2 x 7.4 x 2.7 cm) Hole to Hole Distance 4.71 x 2.64 in. (12.0 x 6.7 cm) Screw Hole Size Ø 0.119 in (Ø 0.3 cm) Display Size 3.5 x 1.4 in. (9 x 3.5 cm) Cord Length to Plug 108 in. (9 feet) Sensor Probe Length 144 in. (12 feet) Product Performance and Technical Specs Total Airflow 205 CFM Total Noise 28 dBA Max Speed 2800 RPM Static Pressure 223 Pa Voltage 100-240V AC Frequency 50/60Hz Max Power Draw 28 W Average Power Usage 21 W Current 1.2 A Power Connector Type US Plug (NEMA 1-15 Type-A) Operating Humidity 35 to 85% RH Operating Temperature 32 to 140°F Ingress Protection IP 44 Fan Bearings Dual Ball Mounting Positions Horizontal or Vertical L10 Life Expectancy 67,000 Hours CE Certification (Whole Product) PDF ETL Cert. (Whole Product) PDF RoHS Cert. (Whole Product) PDF SAA Cert. (Whole Product) PDF Product Manual Product Manual PDF Review: Efficient and Quiet - AC Infinity products never fail to impress - I purchased this T4 In-line Duct Fan for Marine use - The design, efficiency and low noise combined with the interface functionality is awesome - I have since purchased additional smaller fans for other applications Review: Plug socket US - Very good product ! But I gave 4 because they didn't offer me the opportunity to choose the plug socket (I bought an adapter from US to UK ) no problem with the voltage (100-240V). ## Features - Designed for ventilation of hydroponic grow rooms, transfer of heating and cooling air, cooling AV cabinets and removing odours. - Dynamic temperature and humidity programming with timers, growth cycles, schedules and minimum speed settings. - Remote access via our Wi-Fi app to use advanced programs, view climate data and set up automations. - Mixed-flow design combined with a PWM-controlled EC motor for ultra-quiet and energy-efficient operation. - Tube diameter: 100 mm | Dimensions: 175 × 303 × 188 mm | Air flow: 345 m³/h | Noise level: 28 dBA | Bearing: double ball bearings - This product is equipped with a type F power plug and is compatible with the standard voltage in Germany. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B06ZXWN3BG | | Air Flow Capacity | 205 Cubic Feet Per Minute | | Best Sellers Rank | #29,725 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #3,456 in HVAC | | Blade Length | 74 Inches | | Blade Material | Plastic | | Brand Name | AC Infinity | | Collection Name | Hydroponic Ventilation Equipment | | Color | Black | | Connector Type | AC power plug | | Control Method | Touch | | Controller Type | App Control | | Customer Reviews | 4.7 4.7 out of 5 stars (6,879) | | Electric Fan Design | Exhaust Fan | | Finish Type | Painted or Powder Coated | | Form Factor | Inline Duct Fan | | Included Components | Cord | | Indoor Outdoor Usage | Indoor | | Installation Type | inline | | Is Product Cordless | No | | Item Dimensions D x W x H | 17.5D x 18.8W x 30.2H centimeters | | Item Weight | 0.01 Ounces | | Main Power Connector Type | Standard Wall Plug | | Manufacture Year | 2020 | | Manufacturer | AC Infinity | | Material | Plastic | | Model Name | AI-CLT4 | | Model Number | AI-CLT4 | | Motor Type | Brushless | | Mounting Type | Linear Channel Mount | | Noise Level | 28 Decibels | | Number of Blades | 10 | | Number of Power Levels | 8 | | Number of Speeds | 10 | | Part Number | ACAICLT4 | | Power Source | Corded Electric | | Recommended Uses For Product | Cooling | | Reusability | Rechargeable | | Room Type | Kitchen | | Size | 4 inches | | Smart Home Compatibility | Smart Home Compatible | | Special Features | App Operable, Remote Controlled, Water Resistant | | Speed | 2800 RPM | | Standby Power Shutoff | Energy efficient | | Style | Industrial | | Switch Type | Remote Control | | Theme | Ventilation and air conditioning | | UPC | 854759004785 | | Unit Count | 1 Count | | Voltage | 120 Volts | | Wattage | 21 watts | ## Product Details - **Brand:** AC Infinity - **Colour:** Black - **Electric fan design:** Exhaust Fan - **Mounting type:** Linear Channel Mount - **Power source:** Corded Electric - **Product dimensions:** 17.5D x 18.8W x 30.2H centimeters - **Recommended uses for product:** Cooling - **Room type:** Kitchen - **Special features:** App Operable, Remote Controlled, Water Resistant - **Style:** Industrial ## Images ![AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan with Temperature Humidity Controller, Bluetooth App - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics - Image 1](https://m.media-amazon.com/images/I/51X1jHo681L.jpg) ![AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan with Temperature Humidity Controller, Bluetooth App - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics - Image 2](https://m.media-amazon.com/images/I/71cik2o8hxL.jpg) ![AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan with Temperature Humidity Controller, Bluetooth App - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics - Image 3](https://m.media-amazon.com/images/I/71Bmh+hJxgL.jpg) ![AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan with Temperature Humidity Controller, Bluetooth App - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics - Image 4](https://m.media-amazon.com/images/I/61B8EwuR7nL.jpg) ![AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan with Temperature Humidity Controller, Bluetooth App - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics - Image 5](https://m.media-amazon.com/images/I/71CDBlYtPJL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: What is the CFM, wattage, and decibel level?** A: To help alleviate confusion, wanted to chime in here to say the answer posted to this question is outdated from an OLD model. This product has had two improvements since... one is that the fan is now running on a 24v motor, and the CFM is now measured at 205 (improved from a 12v motor at 152cfm). As for noise, I don't think the decibel rating has changed as it is still quiet. The second improvement is much more recent (Decemenr 2018) and was made to the controller unit which now includes humidity control as well as temperature. **Q: Would it work to install this fan through the house wall so that I can bring the cool, outdoor evening air indoors without having the windows open.** A: I've had this idea for 20 years and just never got around to it. First, this is about 200 cfm. Is 200 cfm enough to cause a temp difference. You would think so especially when the temp outside is 64 degrees and the temp inside is 75 degrees. I had a window fan and I was trying to draw cold air from one side of the house by setting the window fan to blow air outside on the otherside of the house. It was a double fan. I had all the windows open about 4 inches. I could not cool my house down. I personally don't want to go to sleep with all the windows in my house open. This little 4inch fan my work ok in one room provided you were circulating the air correctly. Pumping air into a room creates positive pressure so you would have to vent that room to allow the air to leave that room at the same time. Two or three of these or maybe four depending on the size of the house could possibly allow one to circulate enough air to cause a significant temp change. If not then there are larger units. My plan is to use several 8 inch units placed in a central location in the attic and create vents in each room connected to the outside and then to the central fan which would exhaust to the outside or simply in the attic which is vented to the outside. **Q: Can this fan be used to draw radon gas out of my basement if exhasted outside?** A: I am using this for a radon fan. The radon numbers were in the 60s before the fan. After installing it, we have dropped down to 2-7 range. I'm going to add a second one and forgot get the binders to the same area of 0-2. **Q: Can the T4 be mounted vertically?** A: Yes. While the instructions don't make it very clear, you definitely can. Mine has been mounted vertically for two months and working perfectly. I use it to cool an entertainment cabinet. In the Product Description at the link below, it says, "The motor houses dual ball bearings rated at 67,000 hours which allows the duct fan unit to be mounted in any direction." https://www.acinfinity.com/component-cooling/duct-fan-systems/cloudline-t4-quiet-inline-mixed-flow-duct-fan-system-4-inch/#product-description ## Customer Reviews ### ⭐⭐⭐⭐⭐ Efficient and Quiet *by M***D on 16 April 2025* AC Infinity products never fail to impress - I purchased this T4 In-line Duct Fan for Marine use - The design, efficiency and low noise combined with the interface functionality is awesome - I have since purchased additional smaller fans for other applications ### ⭐⭐⭐⭐ Plug socket US *by Y***H on 25 January 2026* Very good product ! But I gave 4 because they didn't offer me the opportunity to choose the plug socket (I bought an adapter from US to UK ) no problem with the voltage (100-240V). ### ⭐⭐⭐⭐⭐ Review *by P***O on 22 October 2025* La base per un sistema affidabile, scalabile a piacimento anche con luci di marca diversa, meglio la versione a 6 porte. Acquista pratica con l'app android va benissimo. Consigliatissimo ## Frequently Bought Together - AC Infinity CLOUDLINE PRO T4, Quiet 4” Inline Duct Fan with Temperature Humidity VPD Controller, WiFi Integrated App Control - Ventilation Exhaust Fan for Heating Cooling, 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 Air Carbon Filter 4" with Premium Australian Virgin Charcoal, for Inline Duct Fan, Odor Control, Hydroponics, Grow Rooms --- ## 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/449842364-ac-infinity-cloudline-t4-quiet-4-inline-duct-fan-temperature](https://www.desertcart.co.uk/products/449842364-ac-infinity-cloudline-t4-quiet-4-inline-duct-fan-temperature) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-18*