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AC Infinity CLOUDLINE Quiet Inline Duct Fan w/ Controller

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Price: $99.00

View more by AC InfinitySKU: AI-CLS4N/AInventory: In StockIn StockOut of stock

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Size: 4 Inch Inline Duct Fan

  • 4 Inch Inline Duct Fan
  • 6 Inch Inline Duct Fan
  • 8 Inch Inline Duct Fan
  • 10 Inch Inline Duct Fan
  • 12 Inch Inline Duct Fan

Controller: Speed Controller

  • Speed Controller
  • Digital Speed & Humidity
Will not ship until [19041994]

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AC Infinity CLOUDLINE Quiet Inline Duct Fan w/ Controller

  • Designed to quietly ventilate grow tents, transfer heating/cooling to rooms, circulate fresh air, and cool AV closets.
  • Optional:
    • Intelligent controller with temperature and humidity programming, fan speed control, timer, and alarm system.
    • 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 truly quiet and energy-efficient performance.
  • The kit also includes a corded AC power adapter, installation manual, and all necessary mounting hardware.


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 an intelligent controller that features advanced programming and functions. Complete kit includes one duct fan unit, one thermal controller, one corded thermal probe, two duct clamps, installation manual, and all necessary mounting hardware.


The inline speed controller enables you to set the duct fan’s speed to optimal noise and airflow levels for various environments. Unlike common AC-powered duct fans that suppresses voltage to control fan speeds, this duct fan features an EC-motor that is precisely controlled using PWM (Pulse Width Modulation). This technology enables the fan's motor to be able to run smoothly at extremely low RPM speeds without generating motor noises and heat as seen on variable voltage controllers. Eight-speed options are available with a power switch, and backup memory. This S4 model can be connected to the smart controller of the CLOUDLINE T4 to share the same programming and power source.


The controller can be programmed to adjust fan speeds to respond to varying high and low temperatures, and humidity. For ventilation applications, the controller can be set to run continuously or triggered to run at customizable speeds when given power, due to its backup memory capability. Additional features include a countdown timer, alarm system, and eco-mode. Includes detachable 12-foot precision probe that is water-resistant. This EC smart controller can power and control 2 inline duct fans of any size, such as this CLOUDLINE T4 with a CLOUDLINE S6.


Unlike common duct fans that use an AC-motor which is 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.


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.

      AC Infinity CLOUDLINE Quiet Inline Duct Fan Specifications

      CLOUDLINE Inline Fan Instructions
      CLOUDLINE CE Certification
      CLOUDLINE RoHS Cert.

      Common Features

      • Power Connector Type: US Plug (NEMA 1-15 Type-A)
      • Power Cord Length: 8 Feet
      • Fan to Controller Cable: 20 Feet
      • Operating Humidity: 35 to 85% RH
      • Operating Temperature: 0 to 140°F
      • Ingress Protection: IP 44
      • Fan Bearings: Dual Ball
      • Mounting Positions: Horizontal or Vertical
      • L10 Life Expectancy: 67,000 Hours
      • Fan Quality Approvals: CE, RoHS
      • Voltage: 100-240V AC, 50/60 HZ


      AC Infinity AI-CLS4 & AI-CLT4 Inline Fan

      • Height w/ Mount: 7.4" (18.8 cm)
      • Height no Mount: 6.61" (16.8 cm)
      • Length: 11.93" (30.3 cm)
      • Flange Opening: 3.82" (9.7 cm)
      • Mount Width: 4.72" (12 cm)
      • Total Airflow: 205 CFM
      • Total Noise: 28 dBA
      • Max Speed: 2800 RPM
      • Static Pressure: 223 Pa
      • Max Power: 28 Watts
      • Average Power: 21 Watts
      • Current: 1.2 Amps
      • Warranty: 2 Year Warranty

      AC Infinity AI-CLS6 & AI-CLT6 Inline Fan

      • Height w/ Mount: 8.35" (21.2 cm)
      • Height no Mount: 7.87" (20 cm)
      • Length: 12.6" (32 cm)
      • Flange Opening: 5.79" (14.7 cm)
      • Mount Width: 5.08" (12.9 cm)
      • Total Airflow: 402 CFM
      • Total Noise: 32 dBA
      • Static Pressure: 503 Pa
      • Max Power: 64 Watts
      • Average Power: 38 Watts
      • Current: 1.67 Amps
      • Warranty: 2 Year Warranty

      AC Infinity AI-CLS8 & AI-CLT8 Inline Fan

      • Height w/ Mount: 9.17" (23.3 cm)
      • Height no Mount: 7.75" (19.7 cm)
      • Length: 11.89" (30.2 cm)
      • Flange Opening: 7.76" (19.7 cm)
      • Mount Width: 5.51" (14 cm)
      • Total Airflow: 807 CFM
      • Total Noise: 39 dBA
      • Static Pressure: 746 Pa
      • Max Power: 110 Watts
      • Average Power: 78 Watts
      • Current: 2.27 Amps
      • Warranty: 2 Year Warranty

      AC Infinity AI-CLS10 & AI-CLT10 Inline Fan

      • Height w/ Mount: 11.3" (28.6 cm)
      • Height no Mount: 9.81" (24.9 cm)
      • Length: 15.07" (38.8 cm)
      • Flange Opening: 9.7" (24.7 cm)
      • Mount Width: 7.79" (19.8 cm)
      • Total Airflow: 1201 CFM
      • Total Noise: 48 dBA
      • Static Pressure: 1059 Pa
      • Max Power: 250 Watts
      • Average Power: 136 Watts
      • Current: 2.7 Amps
      • Warranty: 2 Year Warranty

      AC Infinity AI-CLS12 & AI-CLT12 Inline Fan

      • Height w/ Mount: 14.05" (35.7 cm)
      • Height no Mount: 12.28" (31.2 cm)
      • Length: 17.71" (45 cm)
      • Flange Opening: 12.28" (31.2 cm)
      • Mount Width: 8.66" (22 cm)
      • Total Airflow: 1604 CFM
      • Total Noise: 62 dBA
      • Static Pressure: 818 Pa
      • Max Power: 250 Watts
      • Average Power: 139 Watts
      • Current: 2.5 Amps
      • Warranty: 2 Year Warranty

      Returns Policy

      Last updated October 31st, 2018

      General Returns
      You may return an item(s) within 30 days*** of receipt (delivery) for a refund*. Refunds will be applied to your account (less shipping and restocking fees) in 3-5 business days once the item has been received and inspected through our warehouse**.

      To be eligible for a return, the item must be unused and in its original packaging, and in the same condition in which it was received****. Please do not send your return back to the manufacturer.

      To qualify for a general return, the item(s):

      • Must be in resalable condition
      • Must be free from scratches and/or defects
      • Must not have been installed
      • Must be in the original manufacturer’s box and packaging
      • Must not have any writing on the original packaging
      • Must not be missing pieces
      • Must not be clearance/liquidations/closeout

      *Restocking fees may apply.

      **Refunds may be applied faster if return tracking number is provided by the customer.

      ***Speedee Trim products may only be returned within 5 days of delivery to customer.


      Defective Returns

      During the initial 30 days we will replace defective items through the standard warranty replacement offerings. If no warranty is available then the item(s) will be returned and full credit will be applied back to the customer. If the customer decides to not use the warranty during the initial 30 days this will be considered a general return and be subject to the same terms and conditions.

      To qualify for a defective return, one of the following must apply:

      • Item has a defect that hinders its usability for the purpose of which it was designed and still in the condition it was delivered in
      • Incorrect item was received

      Returns FAQ (Frequently Asked Questions):

      How do I send my return?

      • Please contact us to initiate your return. We will issue you a RGA (Return Goods Authorization) and details for where you will send your return.

      When and why do I have to pay a restocking fee?

      • The items on our website have a 20% restocking fee. This is not a fee imposed by, but rather by our suppliers. Thus, we pass this cost along to our customer when you elect to initiate a General Return.

      How do I cancel an order?

      • Please contact us as soon as possible ( to cancel an order, as shipments can process quickly in some cases. An order may not be canceled if it has already been shipped.

      When should I expect my refund?

      • You can expect your refund to be applied within 3-5 business days of receipt and inspection of your return.

      What is a Return Goods Authorization (RGA) and when will I receive it after I start a return?

      • An RGA is used as a reference to help us track returns. This identifies the return and associates it with your order number. It may take anywhere between 3-5 business days to process and issue an RGA.

      What is a PrePaid Label (PPL) and when will I receive it?

      • A PPL is a prepaid label to return your item(s) via USPS, FedEx, DHL or UPS. PPLs are provided for all returns set up by one of our customer service team members, or via the web. PPLs for defective returns are provided at no cost. For general returns, PPLs are provided by default and the cost of shipping will be deducted from your credit. PPLs will be sent as an embedded URL link in the body of your RGA email.

      My purchase was damaged in transit. How do I return it, request a replacement, and/or file a freight claim?

      • If you notice damage while the carrier is on site, DO NOT take possession of the damaged product(s). Instead, take a picture of the damage, gather copies of the paperwork from the carrier (if possible), and refuse delivery. Next, contact us at

      If you notice damage after delivery (concealed damage), then take pictures of the damage, and contact us at Carriers often only allow two (2) business days after delivery to file a freight claim, so please contact us as soon as possible to initiate your return and/or replacement.

      After the return is set up, please hold the damaged product(s), along with any damaged packaging, for 30 days as the carrier may want to pick up or inspect it. If after 30 days you have not been contacted by or by the carrier, you are free to dispose of the damaged product(s).

      We will not be able to help with any complaints of damages, including visible or material defects, after the product has been used or altered.

      I did not receive all my products, or some items are not what I purchased. What do I do?

      • There are occasions when an order is shipped from multiple locations and will arrive at different times. In the event that all material is not delivered, please contact us at

      If you believe you have received the wrong product, please verify the item number of the product you received against the order confirmation email and/or packing list. If anything does not match, please contact us at so we can assist in getting the wrong item(s) returned and the order corrected.

      My purchase was lost in transit, what should I do?

      • In case of a lost shipment, please contact the shipping carrier and reference your tracking number.

      Shipping Policy

      Last updated September 30th, 2022

      A question many customers have is, “how much will shipping cost?”. Shipping costs are calculated based on your zip code and the weight of items in your cart.

      • Ground Shipping offers: starting at $4.99, and free on orders of select products*.

      *Some restrictions may apply, always check the shipping on the cart page after entering the ship-to zip code.

      Every shipment method we use is trackable and insured. Below is a list of our shipment methods and their shipping times. All shipment times are shown in business days (Monday through Friday, excluding weekends and holidays).

      Standard Shipping

      We use UPS, FedEx, DHL, USPS, or another common carrier that provides insurance and tracking. Shipments often need to be signed for, while shipments can also be left at the driver's discretion.

      • Standard Ground Shipping: 2-5 business days. Deliveries eligible for Free Shipping will have this option available.
      • Please contact us at for expedited shipping inquiries before placing your order.

      If you ordered two or more items, you may receive them in multiple boxes on different days, due to varying availability and shipping locations. We don't charge extra shipping for split shipments.

      We do our best to ensure that shipping is correctly calculated before you purchase. However, at times it may not be possible to do so accurately. We reserve the right to notify you after you've purchased an item of any additional shipping or handling charges necessary to deliver your order. If notified of any additional charges, you have the right to modify or cancel your order for a full refund.

      Estimated Shipment Times*

      If your order is received before 12:00:00 PST, you can expect items specifically marked as IN STOCK on the product page to ship within 1-3 business days.

      During holidays, any orders received will not be processed until the next business day. Items not specifically marked as IN STOCK are either out of stock or located in a warehouse that doesn't provide a live inventory feed. If your order is time sensitive, please contact us to see if your products will ship in a suitable time frame.

      *Please note: Stated shipping and delivery dates are estimates only and can be affected by several factors, including item availability and split shipments.

      Where can I have my order shipped?

      Shipment locations are limited to the 48 continental United States. We do not ship to Alaska, Hawaii, or Canada at this time.

      We are unable to ship to a United States territory directly. Please use a freight forwarder if that is the product’s end destination.

      Shipping & Order Confirmations

      Shortly after placing your order, you'll receive an email confirming that we've received your order. You'll receive a second email when your order has shipped. Please save these email invoices for your records.

      Shipping Backorders

      Occasionally, we must backorder or source inventory from multiple warehouses. This means that different parts of your order can come from various locations around the country.

      If you order more than one item, we'll try our best to send available items together. If only some of the items in your order are available at a single location, we reserve the right to ship you multiple packages from multiple warehouses. If we break your order into multiple packages, you will NOT incur any additional freight charges.

      In the unlikely we're unable to ship your order complete, we reserve the right to ship the stock we have and backorder the items we're unable to ship. You'll be notified via email of the estimated delivery date for your items, and you will NOT be charged additional freight charges for items.

      Your Order Shows Delivered But You Don’t Have It

      If your tracking number shows delivered on the shipping company’s website but you don’t have it, please do the following:

      Check the area around your home for the package and ask anyone it may have been left with. If the package is not found please contact us at 833-874-6239 as soon as possible. Occasionally there may be a mix-up in the warehouse and you may have received an incorrect tracking number. If the tracking number is correct, we will contact the shipper to report a missing package.

      Trim Buddies can not be held responsible for packages stolen from the delivery address so please be sure to ship to a secure location!


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