13 best inline vent fans

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.

• 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

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.

• 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.

• 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 4 inch, Speed 2930 RPM, Air Flow 100 CFM, Voltage 110/120V, Power 12W
• 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:	I don’t have the installation instructions anymore to reference sorry
Question:	Would this fan properly vent a 1000w hps lamp
Answer:	I am cooling two 600 W HPS lamps with a single fan and it works well
Question:	Can this fan be used to help with drafting on a wood stove? In line at top of chimney
Answer:	If you use it to move air into the stove pipe from an outside source, the fan can be outside with a duct that enters the stove pipe midway. This would act like a venturi to force air upward. Think about adding a 45 degree t to your pipe and using this fane to draw cold air from outside and forcing it upwards in the pipe. You don't waste warm air and you get a really stoked fire.
Question:	Can you hook up a speed control to this booster
Answer:	You can hook up a speed control but it does not work very good and was not designed for one. When you start cutting down the power, the fan struggles and eventually stops leaving a loud humming or buzzing sound which does not sound good for the fan and may pose a fire hazard. If you want a variable controlled fan, just buy a fan that has variable control. I made the mistake of buying variable control with this fan. I ended up buying another fan that I could use this variable control on and it is more powerful and much quieter.

Product features

VIVOSUN 4 Inch 100 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.

Product description

Make sure your home is comfortable with Broan's Ventilation Fan! This ventilation fan does it all - from eliminating humidity or stubborn odors such as tobacco or garlic, the exhaust fan has got it covered. This compact unit is designed to fit easily between ceiling joists or wall studs - allowing you to place it wherever it's needed most! It features a plug-in permanently lubricated motor with a polymeric blower wheel to always provide the most efficient performance. It operates on 50 CFM with a 4.0 Sone rating to ensure a peaceful surrounding when in use. The fan features torsion springs grille mounting - no tools are needed! The white polymeric grille is paintable so it can be cohesive with your existing decor and wall color. The Broan's Ventilation Fan is perfect for your home.

From the Manufacturer

Since 1932, Broan-NuTone LLC has led the industry with forward-thinking residential ventilation products, unsurpassed built-in convenience products and superior customer service. While global expertise plays a critical role in Broan-NuTone's ability to being able to meet and exceed the needs and desires of homeowners and designers alike, Broan-NuTone is very proud of the fact that over 80 percent of their products sold in the United States are designed, engineered and manufactured in the United States with U.S. and imported parts. Manufacturing operations in the United States are located in Hartford, Wisconsin and Cleburne, Texas, with customer and technical services located in Hartford and in Cincinnati, Ohio. Broan-NuTone is committed to developing revolutionary products that improve the indoor environment as well as implementing procedures to preserve the outdoor environment. Broan is the industry leader of range hoods, ventilation fans, heater/fan/light combination units, Indoor Air Quality (IAQ) Fresh Air Systems, built-in heaters, whole-house fans, solar powered attic ventilators and trash compactors. NuTone holds major market positions in door chimes, central vacuum systems, stereo intercom systems, home theater speakers, medicine cabinets, ironing centers, ceiling fans and ventilation fans. BEST range hoods are the "Ultimate in Kitchen Ventilation” featuring state-of-the-art performance and Italian design.

• VERSATILE FAN: Ventilation fan helps eliminate humidity, tobacco smoke, and cooking odors. Install the compact fan between ceiling joists or wall studs - wherever it's needed most!
• EFFICIENT: Operates on 50 CFM and has a 4. 0 Sone rating to ensure a peaceful surrounding when in operation
• EASY INSTALLATION: Torsion springs grille mounting - no tools necessary for a quick and easy installation
• DECORATIVE: Paintable polymeric grilles allow you to ensure the fan is cohesive with your existing decor
• FEATURES: Plug-in, permanently lubricated motor with the Broan-designed polymeric blower wheel for high-quality operation every time. Motor snaps in and out for easy cleaning - no screws required. Duct Diameter: 3 inch

User questions & answers

Question:	how difficult is the install without a preexisting fan
Answer:	There are two metal mounting brackets on the fan that mount to the structure with screws. A 3" flexible duct runs from the fan to a wall or roof cap. Two adjustable 3" metal screw clamps are required to hold the 3" flex duct to the fan & cap. An electrical circuit is required to power the fan & it requires an on-off switch. This requires a moderate amount of skill.
Question:	Will this replace 688-k? The K seem difficult to match. Thanks
Answer:	Yes, it will. The model is 688. The "K" just indicates which version of the 688 your fan is.
Question:	I currently have a 688-K, is this the proper replacement
Answer:	Housing is 7 1/4 Length, 7 1/2 Width, 3 5/8 Height / Grille is 9 Length, 9 1/4 Width ( Dimensions in Inches This is a very versitle fan and the 688 Series is typically all the same dimensions.
Question:	What diameter vent hose does this use? Is it
Answer:	Broan web site shows it as a 3" duct size.

Product features

Broan 688 Ceiling/Wall Mount Ventilation Fan, 50-CFM 4.0-Sones, White Grille

Broan fans function as BOTH traditional bath fan for removing humidity and odors on the spot, and as continuously running fan to constantly remove contaminants trapped throughout the home. Problems such as humidity, odors, dust, pet dander, and various chemicals will be eliminated.

Product Details:

Grille:

White polymeric - blends well with any decor. Torsion spring grille mounting - no tools required. Metal grille kit available - purchase separately.

Motor:

Plug-in, permanently lubricated. Broan-designed polymeric blower wheel. Snap in/out motor assembly for easy cleaning - no screws to drive or drop.

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.

Product description

iPower 4 Inch 195 CFM Inline Duct Ventilation Fan Air Circulation Vent BlowerIf you are trying to eliminate the bad odor in your indoor garden, then this powerful and silent inline fan won’t let you down. Control odor for better privacy in the comfort of your own space. Easy to use and install, safe and environmentally friendly, there is no need to suffer from the musty air conditions of your gardening anymore!Features:1. Multifunction: Perfect for grow tents, greenhouses, hydroponics, kitchens, bathrooms, basements, locker rooms, garage to reduce humidity, clear the air and lower temperatures in grow rooms.2. High effective: Transfer air to your target location in a quick and reasonably quiet way, with a fan speed of 2500 RPM for an air flow of 195 CFM.3. Mini construction: Lightweight, compact fan takes up minimal space, suitable for applications where larger fans just won’t fit.4. Low noise design: Fitted with a flow deflector that concentrates the fan stream and cuts turbulent kinetic energy to reduce sound output to just 30db.5. Easy to install: Removable duct ends with locking tabs for easy removal and maintenance, 5. 9 feet length power cord.6. Power source type: Corded ElectriciPower 4 Inch Air Carbon Filter 1. Extended service life: Reversible flange and base intended for extended service life, up to 2 years in life expectancy2. Pre-filter included: We recommend replace the Pre-Filter every 6 months to protect your filter3. Effective odor control: The filter will soak up and eliminate some of the most undesirable odors and additional harmful and potentially ill-fating chemicals in the air. 50mm carbon layer of thickness for higher absorption and performance.4. Inner and outer mesh with 53% open area allows for increased air flow.iPower Non-Insulated Flex Air Aluminum Ducting for HVAC Ventilation1. Flexible length: Flexible length for exhaust fan blower / inline fan; quick and easy to set up.2. Durability: Built-in steel wire for reinforcement and long lasting performance.3. Fire proof coating: Flexible ventilation ducting made from high-quality flame-retardant aluminum and built-in corrosion-resistant wire helix for reinforcement and lasting performance.4. Thermal endurance: Temperature endurance range from 0 185°F. (-18℃ 85℃) 5. Compare with similar items wide applications: Kitchens, bathrooms, greenhouses, grow rooms, grow tents etc

• Mini construction fan: Size: 4 inches; Voltage: 120V; Current: 0.45A; Frequency: 60Hz; Power: 28W; Air velocity: 195 CFM; Speed: 2500 RPM. Low noise design reduce sound output to just 30db
• Air carbon filter: Air flow: 200 CFM; Dimensions: 4 inches flange ducting x 12 inches length. 1050 + IAV Australian RC412 activated carbon. 50mm carbon layer of thickness for higher absorption and performance
• Ducting: 4 inches (diameter) x 8 feet (length) when fully extended. Temperature endurance range from 0 185°F. (-18℃ 85℃). 1 pairs of 4 inches metal clamps made from stainless steel. Flexible length for exhaust fan blower / inline fan
• Multi-functional: This ventilation combo removes heat and eliminate the undesirable ill-smelling odors in the grow tent to solves air delivery problems without major system rework or expense
• Package includes: 1 x 4 inches 195 CFM inline duct ventilation fan; 1 x 4 inches air carbon filter; 1 x 4 inches 8 feet ducting with 2 clamps

User questions & answers

Question:	How long should I run the exhausts
Answer:	Please keep running daily while lights are on. It will get extremely warm. I Shut the fan off at night because my plants produce CO2 at night and good for your plants. Look it up and good luck with your harvest!
Question:	How loud is this fan? I am looking for a very quiet one
Answer:	It is no louder than a large floor or bathroom fan at 52 decibles rated as a quite office. Also it is only running daytime anyways won't disturb your neighbors. Tried to record but Amazon is being wonky on me. Hope this helps!
Question:	Which side should the aluminum foil duct be placed if the fan is outside the tent to the carbron fiber filter
Answer:	There is an arrow on the fan that shows which way the air will flow. You want to make sure the air you are pulling from the tent. Is traveling throw the filter. There are many ways you could do it. I have my filter attached to the “incoming” air side and the foil duct going with the air. That way the air that is in the tent is being pulled through filter and exiting through the duct.

Product features

iPower Grow Tent Ventilation Combo

iPower 4 Inch 195 CFM Inline Fan Circulation Vent Blower and Air Carbon Filter 8 Feet Ducting Combo for Grow Tent Ventilation

Package includes:

1 * 4 inches 195 CFM inline duct ventilation fan

1 * 4 inches air carbon filter

1 * 4 inches 8 feet ducting (2 clamps included)

Inline Fan

High effective: transfer air to your target location in a quick and reasonably quiet way, with a fan speed of 2500 RPM for an air flow of 195 CFM.

Low noise design: fitted with a flow deflector that concentrates the fan stream and cuts turbulent kinetic energy to reduce sound output to just 30dB.

Air Carbon Filter

1050+ IAV Australian RC412 Activated Carbon: One of the world's most absorbent carbon available.

Reversible flange and base intended for extended service life.

Pre-Filter included: We recommend replace the Pre-Filter every 6 months to protect your filter.

Ducting

Flexible length for exhaust fan blower / inline fan; quick and easy to set up.

Built-in steel wire for reinforcement and long lasting performance.

Flame-retardant coating. Temperature endurance range from 0 ~ 185°F (-18℃ ~ 85℃).

• Effective ventilation for medium to large grow tent set ups, HVAC air boosting, heat, exhaust of heat, odor, humidity.
• Built-in variable speed controller allows to select any output between 60% and 100%. Motor Uses 205W.
• Mixed-flow design and quiet motor generate 735 CFM and sound output of 60 dBa (ducted).
• Designed using removable duct ends with locking tabs. Pre-wired (6FT) for easy installation. Includes mounting bracket.
• Duct Size: 8 in. | Dimensions: 12 x 9 x 9 in. | Airflow: 735 CFM | Noise: 60 dBA | Motor: 205W, AC, Brushless | Max Environment Temperature: 140°F.

User questions & answers

Question:	how long is power cord
Answer:	4-5’ I believe.
Question:	Was this fan designed with fan speed controllers in mind? Will using one increase the noise level and/or shorten the life of this fan
Answer:	Hi Robert,Yes, these inline fans can be used with variable fan speed controllers, but there are two things you need to keep in mind:1. Not every fan speed controller unit will work with this fan. We can guarantee that TerraBloom Variable Fan Speed Controller (sold separately on Amazon) does work with booster fans including this one, however, we can't guarantee that any speed controller on the market will work the same because many of them are designed for larger centrifugal fans and we received feedback from customers that they didn't work. 2. The adjustable speed range of the motor of this booster fan is roughly 20-25%, which means that you can decrease the speed roughly by quarter of the overall power before you will start hearing motor "hum", which is a sign that the fan's motor is not getting enough power to operate as designed. Do not decrease the speed of your booster fan past that point, because if the motor is left "humming" it will decrease the useful life of the unit. You can safely decrease the output of this fan by around 20-25% before the hum will be audible and it will significantly reduce the sound produced by the movement of air though the fan (it will be much quieter!) without putting extra strain on the motor and jeopordizing its useful life. Hope this helps!Best regards,TerraBloom
Question:	How quite is this fan
Answer:	The fan is extremely quiet. I can barely hear it. I'd guess, and it's a guess, maybe 45 decibels. Maybe 1.0 sones
Question:	How many decibels
Answer:	I don't have a way to measure the decibels. I have mine about 3 feet from the exit of my duct work with a thin air filter at the end to keep bugs out. So there isn't much material to muffle the sound but my exact setup is silent when standing 15+ feet away. Otherwise alone the unit sounds like a restroom exhaust fan, just a little more smooth. I hope this helps you, good luck with your project.

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.

• 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.

• 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 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.