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AC Infinity

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

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Size: 4-Inch


Color: Pro Smart Controller for T4


Features

  • 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.
  • Remotely connect to our WiFi app to access advance programs, view climate data, and set automation.
  • 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

Brand: AC Infinity


Color: Pro Smart Controller for T4


Electric fan design: Exhaust Fan


Power Source: AC


Style: Cloudline T4


Product Dimensions: 6.9"D x 11.9"W x 7.4"H


Room Type: Kitchen


Special Feature: App Operable, Remote Controlled, Water Resistant


Recommended Uses For Product: Inline Duct Fan


Mounting Type: Downrod Mount


Power Source: AC


Room Type: Kitchen


Special Features: App Operable, Remote Controlled, Water Resistant


Recommended Uses For Product: Inline Duct Fan


Mounting Type: Downrod Mount


Controller Type: App Control


Number of Speeds: 10


Noise Level: 28 Decibels


Wattage: 21 watts


Number of Blades: 10


Air Flow Capacity: 205 Cubic Feet Per Minute


Speed: 2800 RPM


Voltage: 120 Volts


Indoor Outdoor Usage: Indoor


Control Method: App


Standby Power Shutoff: Energy Efficient


Is Product Cordless: No


Number of Power Levels: 8


Main Power Connector Type: AC power plug


Motor Type: EC motor


Installation Type: Mounted


Connector Type: AC power plug


Specification Met: CE, ETL, RoHS


Color: Pro Smart Controller for T4


Electric Fan Design: Exhaust Fan


Style: Cloudline T4


Collection Name: Hydroponic Ventilation Equipment


Item Dimensions D x W x H: 6.9"D x 11.9"W x 7.4"H


Blade Length: 74 Inches


Item Weight: 0.01 Ounces


Cable Length: 144 Inches


Size: 4-Inch


Brand Name: AC Infinity


Included Components: item


Model Name: CLOUDLINE T4


Model Number: AI-CLT4


UPC: 854759004785


Part Number: ACAICLT4


Material: Plastic


Blade Material: Plastic


Frequently asked questions

To connect the AC Infinity CLOUDLINE PRO T4 fan with the WiFi app, first ensure you have a stable WiFi connection. Download the AC Infinity app on your smartphone and create an account if you haven't already. Power on your fan and follow the in-app instructions to connect the fan to your WiFi network. The process typically involves selecting the fan on your app and entering your WiFi credentials.

The AC Infinity CLOUDLINE PRO T4 is designed with a robust temperature and humidity controller that can handle the environmental control required for grow tents and hydroponic systems. It monitors temperature and humidity levels to maintain the optimal VPD (Vapor Pressure Deficit) for plant growth and can manage conditions in a wide range of settings.

Yes, the CLOUDLINE PRO T4 is versatile and can be used for various heating and cooling ventilation applications beyond grow tents and hydroponics. It's designed to work in any setting requiring efficient air exchange, such as attics, bathrooms, workshops, and more, ensuring optimal temperature and humidity levels are maintained.

The AC Infinity CLOUDLINE PRO T4 is engineered for quiet operation, featuring a mixed-flow design and a PWM-controlled EC motor. It is well-regarded for its low noise output, which makes it an excellent choice for environments where noise levels are a concern, such as residential areas, offices, and especially grow tents where fans can run continuously.

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Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.

The AC Infinity 4-Inch PRO fan with Smart Controller receives high praise for its quiet operation at low speeds, the effectiveness in air circulation, and easy installation. It has a well-constructed design with multiple control options afforded by the smart controller. However, users find the fan gets noisy at higher speeds and the vibration may require additional isolation. The controller's complexity and lack of intuitive settings can be a hindrance, although once set up, it operates well.

Pros

  • 🔇 Very quiet at low speeds, still effective at moving air
  • 🛠️ Easy installation with a sturdy mounting bracket
  • 🔄 Adjustable fan direction without uninstalling
  • 🌡️ Comes with a long temperature/humidity sensor cable
  • 🔧 Multiple control options and works seamlessly with corresponding ducting equipment
  • 🏗️ High-quality construction with thick plastic casing

Cons

  • 🔊 Becomes noisy at speeds 3 to 10, vibrations may be an issue
  • 🔧 Controller setup and settings are complicated and not intuitive
  • 🧩 Installation in bathrooms or specific setups may need creative solutions for controller mounting and cord management

Should I Buy It?

If you're in need of a versatile exhaust fan with quiet operation at low speeds and don't mind spending a bit of time on the initial setup, this AC Infinity 4-Inch PRO fan is an excellent choice. It is especially recommended for individuals who need a reliable air circulation solution in spaces like home theaters, grow rooms, or bathrooms. Just be prepared for increased noise when operating at higher speeds and potentially intricate installation scenarios.

    • Top notch quality and an overall very impressive package
Size: 12-Inch Color: Pro Smart Controller
This is really an impressive package from top to bottom. I've been buying AC Infinity products for many years now and have always been completely satisfied with everything, this is no exception. The difference is this is the largest, most important, and most expensive thing I've ever bought from them. I bought the 12" Pro fan to use as a return booster fan for my home's ducted heat pump. I wanted it particularly to boost the return air upstairs in my house to assist with cooling and dehumidification because it gets so much warmer on the second floor. I programmed it to always be running at minimum speed, trigger at 70F and then increase in speed by 1 notch for every 1 degree F rise in temperature beyond 70F, up to a maximum of speed 8. It will also revert to minimum speed at night, regardless of temperature. Setting all of this up was very easy in the app. I didn't even attempt it with the controller because I could tell it would be much more difficult. My recommendation is...just use the app. It was incredibly easy to set up and only took a minute. The quality of the fan is superb. I actually bought spring vibration isolators to mount it on since I installed it in my second floor in a crawl space (just sitting on the floor). I wanted to make sure vibration would not be a problem. However, it turns out I didn't even need the springs, the fan runs so smooth that there is no vibration or noise transmission through the house at all, even on the higher speed settings. The air noise gets loud on the higher speeds (7+), but the fan still runs so smooth that it is virtually silent downstairs. This is very impressive for a fan like this. About the package contents...you get a LOT. Way more than you will actually need. They include VERY long cables (the temp/humidity probe is about 25 feet), several different mounting options including a strap for hanging it and heavy duty screws, two 12" duct straps, and a bunch of zip ties and accessories for cleaning up the cables. All in all its a very impressive package. They do make duct fans of equivalent size that are capable of moving a lot more air than this, but those are very expensive commercial/industrial units and do not include this level of controllability and customization out of the box. If you want or need something like this for your home I can confidently say this is the best option on the market. I can't yet comment on longevity, but this fan will be running continuously in my home from now until November, so we'll see how it does. Based on my experience with several other AC Infinity products I own, I expect this thing will run perfectly for many years without issue. But I will update this review accordingly. ... show more
Reviewed in the United States on April 3, 2026 by LD
    • 350 CFM @ 40w - If you want quality, good airflow with significant energy savings, do consider this
Size: 6-Inch Color: Pro Smart Controller
Review Image by Dhananjay Kumar
I had been on a hunt for low power high CFM fan. I researched on centrifugal fans, mixed flow fans, EC fans. Giving the power consumption and features I settled with this one. Packaging was impressive and the parts themselves reek of quality. DC fan with Dual ball bearing fans are a welcome :). Parts included are; thermostat-controller console, temperature sensor probe, power brick, fan unit, 2 x ducting clamps The fan itself is much lighter compared to other AC fans (not surprising given the fact that power delivery is through a brick) Operation was fairly straightforward once you get used to controls on the thermostat/controller console. I have been using two of these (intake+exhaust) to cool off a mining rig and I am quite content with the performance. I have tried Active Air 6" centrifugal fan rated at 400 CFM. Though being a quality product, was too loud and consumed 105 watts. These are rated at 350 CFM at 40W with added benefit of thermostat control - smart operation. The fans are tad loud at high speed (speed 5-6) but not even close to other fans out there. Speed 1-4 are quiet for my taste. Following are the numbers captured from my test (see image below), CFM measured by converting from Ft/min unit measured by UT363 power consumption measured at the wall using Kill-A-Watt meter Noise captured using a cellphone app measured 3ft away from the fan (probably unreliable but you get the relative idea; active air used to be 85dB+ on this app) Electricity savings per month (considering 10 cents per unit) 40w vs 100w $3 vs $7.2. That's a $4 saving in a month from a single fan. Much more with when the speeds are lower and automatically controlled using thermostat-smart operation. Other thoughts Since this is a mixed flow fan it might not be good to have lots of bends in your ducting. For long ducts with bends, centrifugal fans are much more effective. My exhaust fan didn't suffer from reduced CFM due to bend when I ran it through a 6ft 6" ducting. CFM on intake end reduced by 40% because of filter. (YMMV) Warranty could have been at least 3 years because in comparison others do provide 3,5 or even 10 years (Vortex). However, arguably there are more points of failure for this unit. ... show more
Reviewed in the United States on March 31, 2018 by Dhananjay Kumar
    • Works great and is very quite, well worth the money.
Size: 6-Inch Color: Pro Smart Controller
This is the second one I have bought over the last 3 years. The first one I bought was the 6" blower and I placed it on my Barndo to element negative pressure due the the building being spray foamed. It works great. The second one I bought is the 10" on my goodness at the air it moves. I put it on the main line feeding my game room that is completely on the other end of my house. That room has always been running 5 to 7 degrees warmer the the rest of the house. We could hardly feel any air coming from the vents. After installing it you can feel the movement of air and it cooled the air down to rest of house in about 10 minutes. I have it in auto and have it so it stays on setting 2 100% of time and ramps up as needed. You can't hear the blower at all. Supper quite and highly recommend. ... show more
Reviewed in the United States on April 9, 2026 by Tandy Norris
    • This thing is a machine!
Size: 6-Inch Color: Pro Smart Controller
After using for one season, I have to say I am impressed! I paired this fan up with the CloudForge T3, and between the two I had a utopia in my tent 24 seven! The AI works great. You just have to set your limits for the units you are using. Example, I ran the fan with a max level of six and the humidifier with a max level of three. Everything was perfect. ... show more
Reviewed in the United States on March 31, 2026 by Tony Carlisi

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