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AC Infinity

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

    • Based on 4,066 reviews
Condition: New
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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

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Availability: 15 left in stock
Fulfilled by Amazon
Arrives Tuesday, Dec 31
Order within 17 hours and 32 minutes
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Size: 4-Inch PRO, Speed Controller


Features

  • Designed to ventilate grow tents, transfer heating/cooling to rooms, circulate air, exhaust odors, and cool AV racks.
  • Features a wired 10-speed fan controller; also compatible with all UIS controllers with intelligent programming.
  • PWM-controlled EC motor provides quiet and energy-efficient performance with minimal heat and noise.
  • Mixed flow design with stator blade and hydrodynamic wind circles enables airflow delivery in high resistance areas.
  • Duct Size: 4 | Dimensions: 6.9 x 11.9 x 7.4 in. | Airflow: 205 CFM | Noise: 28 dBA | Bearings: Dual Ball

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


Brand: AC Infinity


Voltage: 240 Volts (AC)


Wattage: 21 watts


Cooling Method: Air


Compatible Devices: Transmission Coolers


Noise Level: 28 dB


Maximum Rotational Speed: 27000 RPM


Air Flow Capacity: 205 Cubic Feet Per Minute


UPC:


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


Brand: AC Infinity


Voltage: 240 Volts (AC)


Wattage: 21 watts


Cooling Method: Air


Compatible Devices: Transmission Coolers


Noise Level: 28 dB


Maximum Rotational Speed: 27000 RPM


Air Flow Capacity: 205 Cubic Feet Per Minute


UPC: 819137020290


Global Trade Identification Number: 90


Manufacturer: AC Infinity


Item Weight: 5.74 pounds


Country of Origin: China


Item model number: CLOUDLINE S4


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Dec 31

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • The Rolls-Royce of exhaust fans
Size: 4-Inch PRO, Speed Controller
This is my third, and likely last, exhaust fan I've bought for a project. I wanted an exhaust system for our cat's litter box cabinet so that it would create a small amount of negative pressure and pull the bad odors outside. This fan is absolutely perfect in every possible way and has far exceeded my expectations. I arrived at this fan, after purchasing two others that were just too loud, as the noise seemed to bother the cat. I installed 2" PVC in the wall behind where the cabinet is, because I needed something small enough to fit. I then had a 90 degree elbow coming out of the wall, through a cover plate and then going into the back of the cabinet. In the attic, I installed a 2" to 4" duct adapter onto the 2" pipe, ran 25' of flex duct to this fan, and then another 16' run of duct to the roof vent. While the first two fans where very noisy, even at the lowest speeds, this one is virtually silent. I'm running it on level 2 and cannot hear anything inside the cabinet or in the house. Since I'm restricting the intake to only 2", anything above level 2 would likely just be a waste of power. This setup is working perfectly and creates more than enough exhaust to do the job and it does it in silence. The prior fans moved the air ok but had a really annoying hum that could be heard through the ductwork and also inside the house through the insulated ceiling. I hear nothing with this one. In addition to the above, the fan is rock solid and came with EVERYTHING one could possibly need to install it, including hose clamps. It's almost overkill but shows attention to detail. It also came with a very nice instruction book (yes, it's a substantial book) with detailed instructions on every aspect of installation and operation. The speed controller is very nice and easy to use. I just set it to my desired level and forget it. It will remember its current setting and resume after a power outage. This fan cost a bit more but is absolutely worth every penny paid. The difference in quality and quietness cannot be matched. I could not be happier, cat is happy, and we have an odor-free home. ... show more
Reviewed in the United States on December 8, 2023 by R. Precourt
    • Mother of all fans
Size: 4-Inch PRO, Speed Controller
Replaced multiple bathroom fans in my house with several of these. Everything about it feels premium. The packaging is nice, the hardware feels like it could be mounted on an aircraft, speed control is smooth, it remembers the speed you set it on even after a power interruption (meaning you can control it from a regular wall switch without loosing your preferred setting), and I've had one in my 120*F texas attic running 24/7 for more than two years and it hasn't missed a beat - and most importantly is still quiet. No rattling or squeaking. This is the one to buy. Worth every penny. And costs less than the "quiet" bathroom fans at home depot, is quieter, and moves more air. If your attic is accessible it's a piece of cake to cut it in line with the duct and hijack the power going to the original fan. Takes less than an hour per bathroom to retrofit for someone with DIY experience and some hand tools. ... show more
Reviewed in the United States on December 11, 2024 by che
    • Quiet, Reliable Duct Fan for Safe 3D Printing Ventilation
Size: 4-Inch PRO, Speed Controller
I bought this duct fan to help expel the fumes from my 3D printer outside, and it’s been a fantastic addition to my setup. It runs 24/7 on the lowest setting, providing continuous ventilation, and I only need to turn it up when actively printing. Despite the constant use, it’s quiet, effective, and has been completely reliable—no issues whatsoever. The fan is compact, which is ideal since it doesn’t take up much space in my setup, making it perfect for those using a vented enclosure for safer 3D printing. The button controls are also very easy to use; however, it can be a bit annoying if you accidentally skip over a level since you have to cycle through again—you can’t go directly backward. If you’re looking to maintain good ventilation and control fumes in your workspace, this fan is an excellent choice. ... show more
Reviewed in the United States on November 14, 2024 by David
    • Very impressed with the quality, and perfect for my use case
Size: 4-Inch PRO, Speed Controller
I have two of these and I use them to pump fresh air into a tent, except I sleep in that tent. The exhaust, so to speak, is directly above my head, and I really couldn't be happier with the quietness of the fans, and they pretty much run at max speed whenever they're on, because the probe is inside the tent. I've seen a few reviews that say these fans are loud, and I can't imagine what they're experiencing. I have two of these fans in line with each other, drawing through an AC Infinity charcoal filter, so that's extra strain, and that filter is in a box which has another duct leading to an air conditioner, which also would introduce some sound, and the only sound I hear is really just the whooshing of the air. I don't hear the fans themselves operating at all, even when I'm outside of the tent. ... show more
Reviewed in the United States on August 11, 2024 by Fletcher

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