13 best inline duct fans

• A duct fan designed to increase airflow in HVAC systems and ventilate home spaces like attics and workshops.
• Features a variable fan speed controller, enabling you to optimize airflow and noise level for any application.
• Unibody die-cast construction with no welded seams; reduces vibration while ensuring smoother airflow.
• AC brushless motor with steel blades and lubricated bearings; not suitable in restricted airflow applications.
• Duct size: 6” | Dimensions: 7.28 x 5.90 x 5.90 in. | Airflow: 265 CFM | Noise: 35 dBA | Bearings: Dual Ball

User questions & answers

Question:	Where can I get a aviation port cord exatention
Answer:	Hello, Thank you for taking the time to reach out to us! Unfortunately, the RAXIAL S6 does not have an extension cord. Please accept our sincerest apology! Thank you for your question! Kind regards, The AC Infinity Team-
Question:	At how high of temps can this fan function or do you recommend another product? Does it have thermal protection
Answer:	I am currently using a 2x2x4 grow tent with 2 "600" watt LED lights that I run from 7pm to 10am and as long as I barely turn the speed controller up a 1/4 turn when lights come on it's about 80 degrees on my therm under the light. Then when the lights go off I just turn down to low and it's perfectly fine gets down to 70 degrees if that's what your house is at. I do HVAC and I was totally blown away with the power, the constructions of material , it's a high quality product I was already thinking of using for customers not getting enough air to bath room or far away room ect.
Question:	Is it possible to Daisy chain this fan to the cloudline T
Answer:	I sort of daisy chained a s4 booster for intake with a T6. I used a 3 grounded outlet adapter to plug both into the temp controller. Works for me.
Question:	Will this plug into T8 digital temp and humidity control
Answer:	Hello there, Thank you for taking the time to reach out to us. We sincerely apologize for any convenience. Unfortunately, our Raxial Booster Fans are not designed to be plugged into the Digital Thermal Controller included with our Cloudline Series of Inline Duct Fans. We will, however, forward your message to our product development team to gauge interest. If you have any other questions, please contact our customer support department directly through our company website and one of our Customer Service Agents will be happy to assist you. Kind regards, The AC Infinity Team -

Product features

Premium Solid Steel Body

This booster fan boasts a matte black aesthetic that expresses the heavy-gauge construction and its high quality. The galvanized steel body has no folded seams, enabling the fan to perform with low noise and no rattling. It also features crimped ridges on the exhaust end for a tight, secure grip on your flex or rigid ducting.

Speed Controller

All models include a speed controller to optimize airflow and noise. The soft rotating knob provides ease of use and quick responses to changing conditions.

High Performance Motor

Uses an AC motor that spins smoothly and relatively silent. Capable of high airflow boosting in applications like active intake for grow tents.

Long-Lasting

Features a 67,000 hour lifespan, using balanced steel blades and lubricated ball bearings that eliminates the need to maintain the fan.

Tight and Secure Lock

The aviation ports are easy to plug in and tightly secures each other using a retainer that also keeps moisture, dust and debris out.

Product description

Inline Duct Fan

The duct fan system is designed to quietly cool AV equipment rooms and closets, and to ventilate various air circulation and exhaust projects. Features an inline speed controller utilizing PWM-technology. Contains a mixed-flow design and an EC-motor for a quiet and high static-pressure performance. The motor box containing the fan’s impeller and blades can be detached from the mounted frame for easy cleaning and maintenance. Complete kit includes one duct fan unit, one inline speed controller, installation manual, and all necessary mounting hardware.

Precise Speed Controller

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 S6 model can be connected to the smart controller of the CLOUDLINE T6 (AI-CLT6) model to share the same programming and power source.

Quiet and Energy Efficient Design

The inline booster fan features 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.

• 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 an EC-powered 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: 6” | Dimensions: 7.9 x 12.6 x 8.4 in. | Airflow: 402 CFM | Noise: 32 dBA | Bearings: Dual Ball

User questions & answers

Question:	how much static pressure can this produce? can it push a couple hundred cfm thru 6 inch duct for 40ft
Answer:	Hello, Thank you for your inquiry. I would recommend using compressed air to clean the unit from the vents. This unit produces 300 Pa of static pressure with a highest CFM rating of 351. That being said, it will initially push a couple of CFM in the beginning but the further it goes the less CFM it will push. Kind Regards,
Question:	Does the fan come with a pressure switch
Answer:	Hi there, Thank you for reaching out to us! The fan only comes with a speed controller that will allow you to adjust the speed of the fan, there is no pressure switch. Kind regards, Kenny Ngo AC Infinity
Question:	Is the impeller on fan made of plastic or metal
Answer:	Hi there, Thank you for reaching out to us! The blades on this fan would be made of plastic. Kind regards, Kenny Ngo AC Infinity
Question:	What is the range of cfm output, at different settings? can i bring it down as low as 100 cfm
Answer:	Hi there, Thank you for reaching out to us! Below I have provided an approximate breakdown of the CFM for the fan on each different speed. 44 / 88 / 132 / 176 / 220 / 264 / 308 / 351 Kind regards, Kenny Ngo AC Infinity

Product features

A Quieter and Smarter Inline Fan

The new CLOUDLINE series contains a cutting-edge Electronically Commutated (EC) motor, controlled using precise electronic pulses and smart programming. This enables the inline fan to operate considerably quieter, and reach low speeds without generating noise or heat. The EC motor is also twice as energy efficient and can save up to 40% in energy costs, paying for itself in the long run.

Smart Programming

T-series models include a programmable controller with precise temperature and humidity sensors located on the 12-foot corded probe.

Quiet PWM Motor

Each fan uses a quiet, energy-efficient EC motor controlled using Pulse Width Modulation (PWM). Dual ball bearings allow for omnidirectional mounting.

Mixed-Flow Design

Featuring a mixed flow design, the fans maintain peak performance in high static pressure environments. Ingress-protected against dust and liquids.

Plug and Play

The complete kit includes the inline fan unit, controller, user manual, and everything needed to mount the fan and power it through an outlet.

CLOUDLINE 4-Series

A CLOUDLINE T4 plus CLOUDLINE S4 system can be linked to the same smart controller, and used in conjunction for a total of 410 CFM airflow. This set-up is ideal for ventilating smaller grow tents and cooling AV rack cabinets.

CLOUDLINE 6-Series

A CLOUDLINE T6 plus CLOUDLINE S6 system can be linked to the same smart controller, and used in conjunction for a total of 804 CFM airflow. This set-up is ideal for large grow tents, AV closet cooling, and boosting airflow for HVAC projects.

MIX and MATCH

The same controller can connect CLOUDLINE fans of different sizes, to share the same programming. For example, an exhausting CLOUDLINE T6 with a filter can share the same controller as an intaking CLOUDLINE S4, to balance static pressure.

Product description

VIVOSUN Duct Fan Inline Fan for Household / Grow Room Ventilation



Item Specifications:

-Diameter: 6 inch

-Power Supply: 110/120V

-Power: 37 W

-Speed: 2960 RPM

-Air Flow: 240 CFM

-Cord Length: 5.5 feet

-Warranty: 1-Year





Key Features:

-Perfect for boosting air flow in long runs of ducting

-Energy efficient & quiet operation

-Lightweight & super easy to install

-Fluted on both ends to receive ducting

-Balanced metal blades are ideal for boosting air supply and venting exhaust air

-Engineered for maximum boost with minimum noise

-Motor features a permanently lubricated bearing that operates quietly and requires no maintenance

-Solve air delivery problems without major system rework or expense

-Can be installed in any location, such as bathrooms, attics, greenhouses, tents, etc.

• HOUSEHOLD APPLICATIONS: Help to boost airflow in HVAC units to remove exhausts and odors from bathrooms & workshops and ventilate basements & attics, etc.
• UPGRADED ADVANTAGES: Superior balanced blades for long service life & quiet operation; Motor features a permanently lubricated bearing that operates quietly and requires no maintenance; Portable and lightweight; Sufficient 5.5' grounded power cord
• SPECS.: Diameter 6 inch, Speed 2960 RPM, Air Flow 240 CFM, Voltage 110/120V, Power 37W
• GROW ROOM APPLICATIONS: Used as intake fan to bring fresh air into grow rooms; Also used as exhaust fan in smaller setups with LEDs or Lights under 400W.
• NOTE: Max Operating Temp of Motor is 130℃ / 266℉; Max Ambient Temp is 60℃ / 140℉. If any other materials/particles get into the duct fan and get the blade stuck, users are to turn off the power immediately, clean it up, turn the power back on when handled properly.

User questions & answers

Question:	Can this be mounted vertically without harm to the motor or bearings? Answers from mfg or installation instructions only please. Thank you
Answer:	The back of my unit gets hot. Too hot to place on a wall. I cannot hold my hand for more than a few seconds. I suggest before hanging it on a wall, allow it to run at 1500 overnight and try feeling the back. Apparently the units vary.The unit is not designed to produce heat on both sides, just the front.
Question:	Would this fan properly vent a 1000w hps lamp
Answer:	Yes it does
Question:	Can this fan be used to help with drafting on a wood stove? In line at top of chimney
Answer:	Yes, the clear gauge on the side (under the handle) is plastic
Question:	Can you hook up a speed control to this booster
Answer:	I have no idea... when the water starts boiling it automatically turns itself off.

Product features

VIVOSUN 6 inch 240 CFM Inline Duct Booster Fan

VIVOSUN inline duct fan helps with ventilation issues. This duct booster fan is perfect for boosting airflow in long runs of ducting. Tight, precise construction eliminates rattling and reduces wear and tear to give the element a long life.

Features

Application Scenarios

Used as intake fan to bring fresh air into grow rooms; Also used as exhaust fan in smaller setups with LEDs or Lights under 400W.

ATTENTION: This duct fan can not used with carbon filter.

• 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 an EC-powered 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

User questions & answers

Question:	If powered from a switched outlet, will it remember the last speed setting or does that require constant power
Answer:	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.
Question:	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
Answer:	Hello, The Maximum rating for that fan unit is 230 degree Fahrenheit. This is what the fans materials are rated for. Thank you for your question! Kind regards, Andrew Avila AC Infinity
Question:	What is the best way to connect this to 12 or 24 volt system
Answer:	Hi there, Thank you for reaching out to us! I'm sorry but this product would need to be plugged directly into an AC outlet to power on or you can also connect the fan to an existing digital thermal controller from the CLOUDLINE T4 model. We do not recommend hardwiring any of our products as it would deem the product out of warranty and will likely cause damage. Kind regards, Kenny Ngo AC Infinity
Question:	How well does this work with a carbon filter
Answer:	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.

Product features

A Quieter and Smarter Inline Fan

The new CLOUDLINE series contains a cutting-edge Electronically Commutated (EC) motor, controlled using precise electronic pulses and smart programming. This enables the inline fan to operate considerably quieter and reach low speeds without generating noise or heat. The EC motor is also twice as energy-efficient and can save up to 40% in energy costs, paying for itself in the long run.

Smart Programming

T-series models include a programmable controller with precise temperature and humidity sensors located on the 12-foot corded probe.

Quiet PWM Motor

Each fan uses a quiet, energy-efficient EC motor controlled using Pulse Width Modulation (PWM). Dual ball bearings allow for omnidirectional mounting.

Mixed-Flow Design

Featuring a mixed flow design, the fans maintain peak performance in high static pressure environments. Ingress-protected against dust and liquids.

Plug and Play

The complete kit includes the inline fan unit, controller, user manual, and everything needed to mount the fan and power it through an outlet.

CLOUDLINE 4-Series

A CLOUDLINE T4 plus CLOUDLINE S4 system can be linked to the same smart controller, and used in conjunction for a total of 410 CFM airflow. This set-up is ideal for ventilating smaller grow tents and cooling AV rack cabinets.

CLOUDLINE 6-Series

A CLOUDLINE T6 plus CLOUDLINE S6 system can be linked to the same smart controller, and used in conjunction for a total of 804 CFM airflow. This set-up is ideal for large grow tents, AV closet cooling, and boosting airflow for HVAC projects.

MIX and MATCH

The same controller can connect CLOUDLINE fans of different sizes, to share the same programming. For example, an exhausting CLOUDLINE T6 with a filter can share the same controller as an intaking CLOUDLINE S4, to balance static pressure.

• EFFECTIVE VENTILATION: Powerful blower with a fan speed of 2500 RPM for an air flow of 195 CFM. Moves air through your target location efficiently for optimal ventilation
• EFFICIENT DESIGN: Lightweight, compact fan takes up minimal space; ideal for applications where larger fans just won’t fit. Efficient flow deflector feature increases air flow while cutting noise output.
• LOW NOISE LEVEL: Fitted with a flow deflector that concentrates the fan stream and cuts turbulent kinetic energy to reduce sound output to just 30 dB
• EASY INSTALLATION: Flanges on both the intake and exhaust ends for simple and easy hookup and a cord length of 5.9 feet for hassle free setup.
• VERSATILE APPLICATIONS: Use anywhere that would benefit from improved air flow to reduce humidity, clear the air and lower temperatures in grow rooms, greenhouses, basements or kitchens; Can be used with a variable speed controller (bought separately)

User questions & answers

Question:	This fan runs on ac or dc power
Answer:	110 ac
Question:	Why is it when I went to pay for the 4” inline fan that was listed at for $25. 98 it went up to $35. Free shipping items $25 or more... Lies
Answer:	Because Amazon doesn't like you, obviously....lmao, nah never count on free shipping unless you have Amazon Prime, and the item has the word Prime in blue with a check mark...otherwise, expect a charge for shipping regardless of the item's description or Amazon's cost analysis. These items are oftenly sold by third party vendors, and Amazon can't always accurately estimate shipping costs for them.
Question:	Can you attach a variable speed controller to this
Answer:	You can, however, with just 200 CFM of air movement you may want to just keep it on full. The motor will make more humming noise if you use a speed controller to decrease speed. I found it makes less noise on full than it does if you decrease the speed which increases motor hum noise considerably.
Question:	Is my fan defective? For such a small fan it is extremely loud
Answer:	Use light weight clipper oil on the moter behind fan blades, also use tape to hold to pieces together after twisting back together. I own three need to add oil to all. All have been running non stop for over 6 months.

Product features

VIVOSUN 4 Inch 195 CFM Inline Duct Ventilation Fan

VIVOSUN inline duct fan helps with ventilation issues. This fan is built durable, runs smooth and quiet. Durable plastic fan housing and blades for extremely low noise.

Product Features

Diameter: 4 inch

Power Supply: 110/120V

Power: 28 W

Speed: 2500 RPM

Air Flow: 195 CFM

Cord Length: 5.9 feet

Application Scenarios

Used as intake fan to bring fresh air into grow rooms; Also used as exhaust fan in smaller setups with LEDs or Lights under 400W.

Product description

Product Description

An inline fan for duct boosting designed to improve airflow in heating and air conditioning applications, and ventilate home rooms like attics, workshops, bathrooms, and kitchens. Each fan uses an easy-to-use knob controller that adjusts fan speed for your specific airflow boosting needs. It features a unibody framework that helps reduce vibration and ensures smooth and low-resistant airflow. The matte black steel cylinder is fluted and ridged for easy and secure installation in-between ducting. Permanently lubricated dual ball bearings spin the balanced steel blades and allow the fan to be mounted in any orientation. This kit includes one AC powered inline booster duct fan, a speed controller with a power plug, mounting screws, and a cable management set.

Speed Controller

The inline variable speed controller can control the fan’s speed and turn it on or off. Turning the knob will increase or decrease the fan speed and optimize airflow and noise levels for your application. Its speed range includes a low, medium and high threshold, producing up to 106 CFM and 28 dBA in noise. This speed controller uses a female aviation plug with a metal retainer, tightly securing its connection to the booster duct fan.

Applications

This versatile inline booster fan is made to be installed in between ducting for various applications that need improved air delivery. In households, it boosts airflow from HVAC units to remove stale air and odor, ventilating attics, workshops, kitchens, basements etc. In grow tents, grow rooms, and indoor gardens, it’s primarily used as an intake fan to bring in fresh air. Please note this booster fan cannot be used standalone in high static pressure applications like room ventilation. Additionally, it is not suitable for use in applications with restricted airflow like systems that use carbon filters. For higher performance, see the CLOUDLINE Series.

• A duct fan designed to boost airflow in HVAC systems and ventilate home spaces like attics and workshops.
• Features a variable fan speed controller, enabling you to optimize airflow and noise level for any application.
• Unibody die-cast construction with no welded seams; reduces vibration while ensuring smoother airflow.
• AC brushless motor with steel blades and lubricated bearings; not suitable in restricted airflow applications.
• Duct size: 4” | Dimensions: 7.28 x 3.95 x 3.95 in. | Airflow: 106 CFM | Noise: 28 dBA | Bearings: Dual Ball

User questions & answers

Question:	Would this product be able to run dual voltage of at least
Answer:	If you don't mind the loud beep every time it turns on or off. My unit has an issue where it does this constantly.
Question:	I want to build a small airbrush box and looking for a very quiet fan. Would this be powerful enough to pull in the spray paint through a filter
Answer:	about 6-8 feet long
Question:	Besides price and how they look, how are Raxial units different from Cloudline
Answer:	I don't think it comes apart
Question:	Can you add a carbon filter
Answer:	No, we did not face any issues with smell. It's excellent! Even Oprah uses this same model :-) Hope you too enjoy it.

Product features

Premium Solid Steel Body

This booster fan boasts a matte black aesthetic that expresses the heavy-gauge construction and its high quality. The galvanized steel body has no folded seams, enabling the fan to perform with low noise and no rattling. It also features crimped ridges on the exhaust end for a tight, secure grip on your flex or rigid ducting.

Speed Controller

All models include a speed controller to optimize airflow and noise. The soft rotating knob provides ease of use and quick responses to changing conditions.

High Performance Motor

Uses an AC motor that spins smoothly and relatively silent. Capable of high airflow boosting in applications like active intake for grow tents.

Long-Lasting

Features a 67,000 hour lifespan, using balanced steel blades and lubricated ball bearings that eliminates the need to maintain the fan.

Tight and Secure Lock

The aviation ports are easy to plug in and tightly secures each other using a retainer that also keeps moisture, dust and debris out.

Product description

Inline Duct Fan

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 a quiet and energy-efficient performance. 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, all necessary mounting hardware, and all necessary mounting hardware.

Intelligent Controller

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 a detachable 12-foot precision probe that is water-resistant. This EC smart controller can power and control two inline fans of any size like this CLOUDLINE T6 with an S4.

Quiet and Energy Efficient Design

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.

• Designed to ventilate hydroponic grow rooms, transfer heating/cooling, cool AV closets, and exhaust odors.
• Intelligent controller with temperature and humidity programming, fan speed control, timer, and alarm system.
• Mixed flow design combined with a PWM-controlled EC-motor for a truly quiet and energy efficient performance.
• Kit also includes corded sensor probe, AC power plug, two duct clamps, and required mounting hardware.
• Duct Size: 6” | Dimensions: 7.9 x 12.6 x 8.4 in. | Airflow: 402 CFM | Noise: 32 dBA | Bearings: Dual Ball

User questions & answers

Question:	Where is the humidity sensor? Is it on the sensor probe that also does temp
Answer:	Hello, Thank you for taking the time to reach out to us. Yes, the humidity sensor detector will be on the same cord as the temperature probe. Kind regards, AC Infinity
Question:	When unplugged and plugged back in will it return to the same speed as before? I want to add a switch to the outlet
Answer:	I just tried it because of your question, yes it does, but I think you're asking about a timer situation, I would say that you shouldn't bother with a timer, the reason to get this fan over others is the programmability, this thing self adjusts its own speed based on the high/low temp and the high/low humidity that you enter, the power used to run it is very small.
Question:	Humidity and temperature way off does anybody else have this problem? Can it be fixed
Answer:	If all of you that have problems with these would read the instructions you can calibrate both temp and humidity as well as fix any problem with your fan not working it’s probably not turned on or is in the wrong setting check the instructions before blaming the unit these things are great in my opinion
Question:	What are the cfm rating on it
Answer:	Hello there! Thank you you for taking the time to reach out to us with your product question! The CFM rating for the CLOUDLINE T6 is 351 CFM. Also, for your reference, I have included all technical data associated with the T6 (please see below): Product Identification Manufacturer AC Infinity Inc. Product Name CLOUDLINE T6 Product Model AI-CLT6 UPC Code 854759004792 Product and Mounting Dimensions - Fan Unit Total Dimensions 7.87 x 12.60 x 8.35 in. (21.2 x 32.0 x 20.0 cm) Mounting Hole-To-Hole Distance 3.15 X 2.36 in. (8.0 x 6.0 cm) Screw Hole Size Ø 0.236 in. (Ø 0.6 cm) Cord Length 144 in. (12 feet) Product and Mounting Dimensions - Controller Total Dimensions 5.20 x 3.11 x 1.10 in. (13.2 x 7.9 x 2.8 cm) Backside Enclosure Dimensions 4.41 x 2.68 in. (11.2 x 6.8 cm) Required Mounting Hole 4.48 x 2.76 in. (11.4 x 7.0 cm) Hole to Hole Distance 4.71 x 2.64 in. (12.0 x 6.7 cm) Screw Hole Size Ø 0.157 in. (Ø 0.4 cm) Display Size 2.25 x 1.25 in. (4.7 x 3.2 cm) Cord Length 72 in. (6 feet) Thermal Probe Length 72 in. (6 feet) Mounting Template Installation Manual PDF Product Performance and Technical Specs Total Airflow 351 CFM Total Noise 32 dBA Static Pressure 300 Pa Operating Voltage 24V DC Power 40 W Current 1.67 A Wall Adapter Input 100 to 240V AC Operating Humidity 35 to 85% RH Operating Temperature 14 to 230°F Ingress Protection IP 44 Fan Bearings Dual Ball L10 Life Expectency 67,000 Hours Fan Quality Approvals UL, CE, TUV, RoHS Thank you for your question! Kind regards, Andrew Avila AC Infinity

Product features

A Quieter and Smarter Inline Fan

The new CLOUDLINE series contains a cutting-edge Electronically Commutated (EC) motor, controlled using precise electronic pulses and smart programming. This enables the inline fan to operate considerably quieter, and reach low speeds without generating noise or heat. The EC motor is also twice as energy efficient and can save up to 40% in energy costs, paying for itself in the long run.

Smart Programming

T-series models include a programmable controller with precise temperature and humidity sensors located on the 12-foot corded probe.

Quiet PWM Motor

Each fan uses a quiet, energy-efficient EC motor controlled using Pulse Width Modulation (PWM). Dual ball bearings allow for omnidirectional mounting.

Mixed-Flow Design

Featuring a mixed flow design, the fans maintain peak performance in high static pressure environments. Ingress-protected against dust and liquids.

Plug and Play

The complete kit includes the inline fan unit, controller, user manual, and everything needed to mount the fan and power it through an outlet.

CLOUDLINE 4-Series

A CLOUDLINE T4 plus CLOUDLINE S4 system can be linked to the same smart controller, and used in conjunction for a total of 410 CFM airflow. This set-up is ideal for ventilating smaller grow tents and cooling AV rack cabinets.

CLOUDLINE 6-Series

A CLOUDLINE T6 plus CLOUDLINE S6 system can be linked to the same smart controller, and used in conjunction for a total of 804 CFM airflow. This set-up is ideal for large grow tents, AV closet cooling, and boosting airflow for HVAC projects.

MIX and MATCH

The same controller can connect CLOUDLINE fans of different sizes, to share the same programming. For example, an exhausting CLOUDLINE T6 with a filter can share the same controller as an intaking CLOUDLINE S4, to balance static pressure.

• Designed to ventilate hydroponic grow rooms, transfer heating/cooling, cool AV closets, and exhaust odors.
• Intelligent controller with temperature and humidity programming, fan speed control, timer, and alarm system.
• Mixed flow design combined with a PWM-controlled DC or EC-motor for a truly quiet and energy efficient performance.
• Kit also includes corded sensor probe, AC power plug, two duct clamps, and required mounting hardware.
• Duct Size: 4” | Dimensions: 6.9 x 11.9 x 7.4 in. | Airflow: 205 CFM | Noise: 28 dBA | Bearings: Dual Ball

User questions & answers

Question:	Can this fan be used as a dryer vent booster
Answer:	I would not recommend putting any fan in a dryer vent. Dryers don't catch all the lint and the rest blows out the vent. That lint is often somewhat sticky, particularly when fabric softener is used. A fan would create a place for all that lint to stick and it would quickly become covered. If you attempt it, make sure you can easily remove the fan for cleaning. Also it might be a fire hazard as the motor might expect a certain amount of air flow for cooling and the lint could plug that up causing it to over heat. The lint would then be excellent tinder. Ideally for your application a boost fan would not provide an obstruction to the air flow and would work on the venturi effect. Basically injecting high speed air at the edges to speed up the larger volume of flow in the middle. I don't think anyone makes such a fan however. The only example I can think of is the fan make by Dyson and sold as "bladeless" though it really has blades in the base. It is designed for another purpose however and cannot be used in your duct. I presume this is a gas dryer. Due to the hazards of it not venting properly, the best thing to do is probably to find a way to cut an exit hole closer to the dryer and use a shorter vent pipe. Electric dryers can be vented indoors thru a filter box that catches any remaining lint. That will increase the indoor humidity though.
Question:	Can this fan be used to draw radon gas out of my basement if exhasted outside
Answer:	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.
Question:	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
Answer:	Hi Nikki!Thank you for your inquiry.We usually do not recommend bringing out door air directly into the house, it has to be conditioned first and its often better to just recirculate air. Depending on the amount of airflow you were looking for, that would be the determining factor. These units move quite a bit of volume of airflow and are primarily used in filtering or moving air from room to room. You would have absolutely no problems operating this unit in a room-to-room or exhaust fashion! We greatly appreciate your interest and consideration in regards to our cooling products!Warm Regards,Tommy KaragiasAC Infinity
Question:	What is the CFM, wattage, and decibel level
Answer:	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.

Product features

A Quieter and Smarter Inline Fan

The new CLOUDLINE series contains a cutting-edge Electronically Commutated (EC) motor, controlled using precise electronic pulses and smart programming. This enables the inline fan to operate considerably quieter and reach low speeds without generating noise or heat. The EC motor is also twice as energy-efficient and can save up to 40% in energy costs, paying for itself in the long run.

Smart Programming

T-series models include a programmable controller with precise temperature and humidity sensors located on the 12-foot corded probe.

Quiet PWM Motor

Each fan uses a quiet, energy-efficient EC motor controlled using Pulse Width Modulation (PWM). Dual ball bearings allow for omnidirectional mounting.

Mixed-Flow Design

Featuring a mixed flow design, the fans maintain peak performance in high static pressure environments. Ingress-protected against dust and liquids.

Plug and Play

The complete kit includes the inline fan unit, controller, user manual, and everything needed to mount the fan and power it through an outlet.

CLOUDLINE 4-Series

A CLOUDLINE T4 plus CLOUDLINE S4 system can be linked to the same smart controller, and used in conjunction for a total of 410 CFM airflow. This set-up is ideal for ventilating smaller grow tents and cooling AV rack cabinets.

CLOUDLINE 6-Series

A CLOUDLINE T6 plus CLOUDLINE S6 system can be linked to the same smart controller, and used in conjunction for a total of 804 CFM airflow. This set-up is ideal for large grow tents, AV closet cooling, and boosting airflow for HVAC projects.

MIX and MATCH

The same controller can connect CLOUDLINE fans of different sizes, to share the same programming. For example, an exhausting CLOUDLINE T6 with a filter can share the same controller as an intaking CLOUDLINE S4, to balance static pressure.

• EFFECTIVE VENTILATION: Powerful blower with a fan speed of 2550 RPM for an air flow of 390 CFM. Moves air through your target location efficiently for optimal ventilation
• LOW NOISE LEVEL: Durable plastic fan housing and blades for extremely low noise(<37 dB); Variable speed controller for easy fan speed adjustment.
• EASY INSTALLATION: Removable duct ends with locking tabs for quick removal and easy maintenance and a cord length of 5.4 feet for hassle free setup.
• VERSATILE APPLICATIONS: Suitable for industrial, household and horticulture ventilation applications for air clean and temperature control.
• NOTE: Comes with an installation bracket indicating the direction of the airflow. Max Ambient Temp is 104℉ / 40℃

User questions & answers

Question:	Would the 4" fan work ok if I used an adapter and connected it to a 2" pipe? Would the extra resistance damage the motor
Answer:	Maybe. This is actually for a 6" duct, so that may be even more of an issue.
Question:	Would the 4" fan work ok if I used an adapter and connected it to a 2" pipe? Would the extra resistance damage the motor
Answer:	I would not reduce it that much.. buy a 2 inch fan
Question:	Do you have in 230v 60hz
Answer:	No, 120v
Question:	is it really quiet
Answer:	I have the 8" -- it is NOT quiet at all. 75dBA at a meter when set full speed; and still 68dBA when set full minimum speed. Nowhere close to the 40dBA spec they claim.

Product features

VIVOSUN 6 Inch 390 CFM Inline Duct Fan with Speed Controller

VIVOSUN inline duct fan helps with ventilation issues. This fan is built durable, runs smooth and quiet. Durable plastic fan housing and blades for extremely low noise; Variable speed controller for easy fan speed adjustment.

Features

• Diameter: 6 inch
• Power Supply: 110/120 V
• Power: 67 W
• Current: 0.55 A
• Speed: 2550 RPM
• Air Flow: 390 CFM
• Noise Level <37 dB
• Max Ambient Temp is 104℉ / 40℃.

Application Scenarios

Used as intake fan to bring fresh air into grow rooms; Also used as exhaust fan in smaller setups with LEDs or Lights under 600W.

• A duct fan designed to boost airflow in HVAC systems and ventilate home spaces like attics and workshops.
• Features a variable fan speed controller, enabling you to optimize airflow and noise level for any application.
• Unibody die-cast construction with no welded seams; reduces vibration while ensuring smoother airflow.
• AC brushless motor with steel blades and lubricated bearings; not suitable in restricted airflow applications.
• Duct size: 8” | Dimensions: 7.28 x 7.87 x 7.87 in. | Airflow: 428 CFM | Noise: 43 dBA | Bearings: Dual Ball

User questions & answers

Question:	Anyone have Cloudline also? Wanting compare sound. Just want to filter room air that escapes the tent to help stop smell moving to rest of house
Answer:	I'm no personal trainer but I do use various methods to keep an eye on my weight, fat, water intake and exercise. In addition to my FitBit and RunKeeper app, I am on my second Tanita scale because I love how it gives you weight, fat and water intake. Our first Tanita scale lasted well over a decade and so I was happy to find that I could order the same exact model. Two users can save their data on it. Good luck!
Question:	I want to use this to pull air through a downdraft table with 12x20x2” pleated filter would it provide enough suction
Answer:	I believe it measures in Kg too and there are not any words other than user 1, user 2 and guest. The rest are letters that stand for BFC-Body Fat Composition ( for example)
Question:	If you use it to pull cold air in from outside would Condensation cause problems
Answer:	The Tanita BF-679 is made in China.
Question:	Can we use it as bath room exhaust fan
Answer:	There is a switch on the back of the scale.

Product features

Premium Solid Steel Body

This booster fan boasts a matte black aesthetic that expresses the heavy-gauge construction and its high quality. The galvanized steel body has no folded seams, enabling the fan to perform with low noise and no rattling. It also features crimped ridges on the exhaust end for a tight, secure grip on your flex or rigid ducting.

Speed Controller

All models include a speed controller to optimize airflow and noise. The soft rotating knob provides ease of use and quick responses to changing conditions.

High Performance Motor

Uses an AC motor that spins smoothly and relatively silent. Capable of high airflow boosting in applications like active intake for grow tents.

Long-Lasting

Features a 67,000 hour lifespan, using balanced steel blades and lubricated ball bearings that eliminates the need to maintain the fan.

Tight and Secure Lock

The aviation ports are easy to plug in and tightly secures each other using a retainer that also keeps moisture, dust and debris out.

• EFFICIENT FAN - Combines the features and benefits of axial and centrifugal fan, effectively circulates air for room ventilation and odor purification; Please be aware that the value of air flow is the maximum tested at ZERO atmospheric pressure
• EASY ASSEMBLY - Features with lightweight, durable and UV resistant plastic housing guarantees long-term use; Simply remove the duct ends with locking tabs for quick installation and easy maintanance; Universal mounting bracket for direction of airflow indicating
• SPEED CONTROLLABLE - A variable speed controller designed in the 5.4 feet power cord, its three speed switch enables fan to run at low, medium and high speed, you can adjust it to desired airflow level according to your requirement
• QUIET OPERATION - The durable fan blades revolves smoothly and powerfully, which helps collect airflow volume and cut noise output; A less than 31 dB noise level does not have any harm and will not disturb your work
• MULTI APPLICATIONS - Help you maintain a healthy grow room by quietly and efficiently moving large volumes of air throughout your ventilation system; Ideal solution for multi-purpose use in residential and commercial ventilation

User questions & answers

Question:	Can this be used for an indoor spray painting booth
Answer:	Hi, this heater does not make a beeping sound when changing settings. Thank you.
Question:	Are these fans "booster" fans or are they tight enough to actually pull air
Answer:	We are heating a room that is about 500sq.ft. The temp outside is about 32 to 45 degrees. The room temp.is about 68. We also used a little oil heater sometimes
Question:	So what is a good recommended fan to push 10 of the 1000 watt HPS
Answer:	Watt are equal to Volts x Amps, so Amps are equal to Watts/Volts. Wall outlets in the U.S. are at 120 volts. Hence if the heater draws the rated wattage, 750/120 = 6.25A on Low and 1500/120 = 12.5 Amps on High.
Question:	are these reversible? any way to wire these to switch direction
Answer:	Yes and no. The unit produces X amount of heat for either high or low setting; you can't change that. The thermostat only controls run time. If you move air through it faster, the air coming out will be less warm. So for example... Say the air coming out is normally 90 degrees. If you speed up the air flow, then the air coming out might only be 70 degrees. In theory, you could "tune" the system with a small fan to get faster circulation of 80 degree air. You'd have to find a fan size and speed that gives you the results you are looking for. As already stated by others, a ceiling fan on low will get the warmth off the ceiling and push it down for better overall circulation.

Product features

VIVOHOME 6 Inch 395 CFM Black Round Exhaust Inline Duct Fan

• Material: Plastic
• Color: Black, Red
• Air flow range: 296(±10%) cfm ~ 395(±10%) cfm
• Current: 0.55A
• Speed: 2550rpm
• Frequency:60Hz
• Power: 67W
• Package Dimensions: 13"L*10"W*10"H
• Item Weight: 7lbs
• Package Include: 1 x Inline Ventilation Duct Fan, 1x Mounting Bracket, 1 x Manual Instruction

Balanced Blades Ideal For Air Supply & Venting Air Exhaust

1.Combines the features and benefits of axial and centrifugal fan

2. Maintain a healthy grow room by quietly and efficiently move large volumes of air throughout your ventilation system

3. Features with lightweight, durable and UV resistant plastic case and universal mounting bracket for easy replacement

4. Variable speed controller with three speed switch, so you can adjust it according to your requirement

5. Low noise which do not have any harm and will not disturb your work

• POWERFUL AIR FLOW FAN: Heavy hitting blower with a fan speed of 2300 RPM for an air flow of 190 CFM, Puts out only 31 dB noise level. Moves air through your target location efficiently for optimal ventilation
• SUPERIOR CARBON FILTER: 1050+ RC 48 Australian Virgin Charcoal Bed. Dimensions: 4" x 14"
• EFFECTIVE ODOR CONTROL: The carbon filter eliminates some of the most undesirable odors, pungent smell and particulates from indoor grow tent, hydroponics grow room.
• FREE PRE-FILTER INCLEDED: We recommend replace the pre-filter every 6 months or after completion of each grow cycle.
• VERSATILE APPLICATIONS: Kitchens, Bathrooms, Greenhouses, Grow Rooms, Grow Tents, etc

User questions & answers

Question:	Can the blowing direction of the fan be inverted with the switch or works only in one direction? I see the filters does, it works for intake/exhaust
Answer:	china
Question:	Will this work and be powerful enough for a 2x4x5 grow tent
Answer:	Hi, in Anti-Freeze mode, the unit keeps the room at a temperature of 45°F to prevent freezing temperatures. Eco Mode; the appliance will automatically set the power level to guarantee the best comfort reducing energy consumption. In this operating mode, the unit may switch the heating power level from maximum to minimum and vice versa, several times in an hour. When using the ECO function, the maximum temperature setting is 79°F. To activate this function, press the ECO button. Thank you!
Question:	Will this for sure cool down my tent ? I have 300w light, I raised it but still 3-5 degrees too hot, please help
Answer:	No, it is for the amount of time you want it to run before shutting off
Question:	Can you provide a transformer to be able to run in a 240v environment? for New Zealand
Answer:	Doubtful. This heater starting malfunctioning on me less then 1 year after getting it. It would shut off with out notice. I assume it was overheating. Not a very reliable model. I ended up getting a dyson hot+cold afterwards and it's been good (Expensive but seems to be built like a tank).

Product features

Inline Fan

• Energy efficient & quiet operation
• Lightweight & super easy to install.
• Balanced blades are ideal for boosting air supply and venting exhaust air.
• Engineered for maximum boost with minimum noise.
• Motor features a permanently lubricated bearing that operates quietly and requires no maintenance.
• Solve air delivery problems without major system rework or expense.
• Can be installed in any location, such as greenhouses, tents, etc.

Carbon Filter

VIVOSUN Carbon Filters are perfect for the following applications:

• Grow tents, cupboards and cabinets.
• Anywhere without a roof/ceiling cavity to displace extracted air into.
• Air-cooled lighting.
• Lower-level floors of double/triple story houses.
• Window to window ventilation applications.
• Hot or cold "filtered air transfer" from one air conditioned room to another.

Inner & Outer Mesh

Provides a 53% open area which allows for increased air flow.

Reversible Flange & Base

Intended for longer service life, up to 2 years in life expectancy.

Two Belts

Included in the package.

• EFFICIENT FAN - Quiet and efficient design, work well in ventilating grow tents, transfer heat or cool rooms, circulate fresh air, and control proper humidity, temperature, and air quality for your grow area; Be aware that 195 CFM is the maximum value of air flow tested at ZERO atmospheric pressure
• PREMIUM CONSTRUCTION - Blades are made with high-quality components for smooth, whisper-quiet operation; Ultra-accurate craftsmanship of the centrifuge reduces noise and vibration; Compact design means minimal use of space and will fit in any grow room
• LOW NOISE - Fan runs at 2930 RPM with 195 CFM of airflow; Fan is equipped with a flow deflector to cut noise output; Runs at 30 dB noise level to ensure your grow operation won’t disturb your life
• EASY TO INSTALL - Simply affix the exhaust and intake mounting flange together with locking tabs, no tools or screws required; The housing, even the impeller and blades, are easy to detach for cleaning and maintenance
• WIDE APPLICATIONS - Clean and freshen the air for your plants, keeping your environment cool and balanced, ideal for indoor ventilation and odor filtration; Widely used in pharmacies, bakeries, cafes, grow tents, hydroponics, bathrooms, greenhouses, basement workshops, etc

User questions & answers

Question:	How loud is this? I plan to use it around family.. Going to build a powerful difuser
Answer:	These little only assist to build pressure inside the duct. They have no power to be an exhaust fan.
Question:	Can this fan be used as a radon mitigation fan
Answer:	No I put it in a bathroom 8 in vent not very strong.
Question:	Thinking of getting 1 does anybody know how long the power cord is
Answer:	Usually warm air holds more moisture than cold . Condensation can be prevented by insulating your duct work. Your airconditioner both cools and dehumidifies your air. Climate is different in different areas of the country. In some desert areas you can cool your home without airconditioning by using a swamp chiller. Air is blown over chilled h2o. Again the humidity of outside air is important. Insulation is also important.
Question:	How does it perform under static pressure? Is there a data sheet I can look at
Answer:	No, it does not install via hardwiring it into the electrical system. It plus into a standard out and has the control switch attached to the power cable.

Product features

VIVOHOME 4 Inch 195 CFM Plastic Round Exhaust Inline Duct Fan

VIVOHOME Inline Duct Fan is an ideal solution for ventilating your home, business, greenhouse, or tent. Quiet and powerful, this fan will move or circulate air wherever you need and expel bad smells.

Product Features

• Material: Plastic
• Color: Black
• Condition: 100% brand new
• Air flow: Max. 195 cfm
• Package Dimensions: 8.3"L*7.8"W*7.2"H
• Item Weight: 3lbs
• Package Inlcude: 1 x Inline Ventilation Duct Fan