The Best 4 Inline Fan Reviews & Comparison

Have you ever had difficulty locating what you were looking for? You could have spent hours just reading page after page on the same website, double and triple confirming that they had everything you needed. No, they did not. Then you read that product's negative reviews and could see for yourself how horrible it is. That's why we compiled this list, which we hope will make your purchasing experience much smoother.

There are numerous 4 inline fan options available on the market. We've looked everywhere to bring you our choices for the greatest product, so you can pick one that respects your time while still getting the job done. You might think that this complicates the decision-making process. I can assure you that it does not. You can take the easy route or read on for my top 4 inline fan suggestions!

10 Best 4 inline fan: Editor's Picks
# Preview Product Score
1 VIVOSUN 4 Inch 195 CFM Inline Duct Ventilation Fan HVAC Vent Blower for Hydroponics Grow Tent

VIVOSUN 4 Inch 195 CFM Inline Duct Ventilation Fan HVAC Vent Blower for Hydroponics Grow Tent

9.8
2 AC Infinity RAXIAL S4, Inline Booster Duct Fan 4” with Speed Controller - Low Noise Inline HVAC Blower Can Fan for Basements, Bathrooms, Kitchens, Workshops

AC Infinity RAXIAL S4, Inline Booster Duct Fan 4” with Speed Controller - Low Noise Inline HVAC...

9.3
3 AC Infinity CLOUDLINE S4, Quiet 4” Inline Duct Fan with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

AC Infinity CLOUDLINE S4, Quiet 4” Inline Duct Fan with Speed Controller - Ventilation Exhaust Fan...

9.6
4 iPower 4 Inch 130 CFM Inline Duct Fan with Variable Speed Controller HVAC Quiet Exhaust Blower for Heating Cooling, Grow Tents, 4', Hydroponics Ventilation

iPower 4 Inch 130 CFM Inline Duct Fan with Variable Speed Controller HVAC Quiet Exhaust Blower for...

9.7
5 VIVOSUN 4 Inch Inline Duct Fan 100 CFM, HVAC Exhaust Ventilation Fan with Low Noise for Basements, Bathrooms, Kitchens and Attics, Silver

VIVOSUN 4 Inch Inline Duct Fan 100 CFM, HVAC Exhaust Ventilation Fan with Low Noise for Basements,...

9.5
6 AC Infinity CLOUDLINE LITE A4, Quiet 4” Inline Duct Fan with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

AC Infinity CLOUDLINE LITE A4, Quiet 4” Inline Duct Fan with Speed Controller - Ventilation...

9.4
7 iPower 4 Inch 230 CFM Inline Duct Ventilation Fan Quiet Vent Blower for Hydroponics Grow Tent, Greenhouse Air Circulation, Upgrade, Black

iPower 4 Inch 230 CFM Inline Duct Ventilation Fan Quiet Vent Blower for Hydroponics Grow Tent,...

9.6
8 AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan with Temperature Humidity Controller, Bluetooth App - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan with Temperature Humidity Controller, Bluetooth...

9.5
9 iPower 4 Inch 130 CFM Inline Duct Fan with Variable Speed Controller HVAC Quiet Exhaust Blower for Heating Cooling, Grow Tents

iPower 4 Inch 130 CFM Inline Duct Fan with Variable Speed Controller HVAC Quiet Exhaust Blower for...

9.2
10 iPower 4 Inch 90 CFM Inline Fan Duct Exhaust Booster with Speed Controller for HVAC in Grow Tent, Basements, Bathrooms and Kitchens

iPower 4 Inch 90 CFM Inline Fan Duct Exhaust Booster with Speed Controller for HVAC in Grow Tent,...

9.2

Top 10 Best 4 inline fan Reviews: According to Testing

We divide our analytical approach into three categories to decide our review and overall rating: ease of use, quality, and durability. Each of these factors is weighted according to its importance to these products. If that sounds unduly simplistic, trust us when we say it isn't. Before calculating an overall score, our products were separated into dozens of different analyses. Based on professional advice, we have chosen our top picks:

  • Size
  • Brand value
  • Features
  • Style
  • Design
  • Longevity
  • Price
  • Warranties
  • Types
  • Specifications
  • Durability
  • Quality
  • Materials
  • Consumer ratings, reviews & many more
SaleBestseller No. 1

VIVOSUN 4 Inch 195 CFM Inline Duct Ventilation Fan HVAC Vent Blower for Hydroponics Grow Tent

  • Powerful Airflow: This VIVOSUN powerful blower with a fan speed of 2500 RPM can create an airflow of 195 CFM; It works efficiently in ventilating grow tents, transferring heat or cool rooms, circulating fresh air, as well as controlling proper humidity, temperature, and air quality for your grow area
  • Quiet Operation: Fitted with a flow deflector that concentrates the fan stream and cuts turbulent kinetic energy to reduce sound output to just 30 dB, which does not have any harm to your health and will not disturb your work
  • Safety Protection: The motor is ETL listed and features an automatic reset function to prevent overheating or other safety issues; The electrical junction box is made from flame-retardant components for fireproofing
  • Simple Hookup: The flanges on both the intake and exhaust ends are simple to assemble with the vent hose by locking tabs; A cord of 5.9-feet long for hassle-free setup; The housing, even the impeller and blades, are easy to detach for cleaning and maintenance
  • Wide Applications: It can improve airflow to reduce humidity, block odors, and lower temperatures in grow rooms, basements, or kitchens; Can be used with a variable speed controller (bought separately)
Bestseller No. 2

AC Infinity RAXIAL S4, Inline Booster Duct Fan 4” with Speed Controller - Low Noise Inline HVAC Blower Can Fan for Basements, Bathrooms, Kitchens, Workshops

  • 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
Bestseller No. 3

AC Infinity CLOUDLINE S4, Quiet 4” Inline Duct Fan with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

  • 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
Bestseller No. 4

iPower 4 Inch 130 CFM Inline Duct Fan with Variable Speed Controller HVAC Quiet Exhaust Blower for Heating Cooling, Grow Tents, 4", Hydroponics Ventilation

  • Upgraded Fan: Size: 4inch; fan speed: 2500 RPM; air flow: 130 CFM; wind pressure: 220 pa; bearings: double ball. 110V standard household plug; Pre-wired 5.9 feet power cord. Max Ambient Temp is 140℉/ 60℃
  • Speed controller: Three speed switches enable fan to run at low, medium and high speed. Durable 3-pole grounded plug need no extra wires to deal with. You can correctly and precisely adjust the airflow level according to your requirement
  • Mixed flow design: Compared with axial and centrifugal fans, mixed flow fan has large air volume and high static pressure for ventilation and purification. Durable plastic housing and blades revolve smoothly and powerfully and cut noise output to 35 Db
  • Easy installation: Feature with lightweight and compact enough to be installed in any angel and little availvable areas. Simply remove the duct ends with locking tabs for quick installation and easy maintanance
  • Safe and versatile applications : Fully enclosed junction box, waterproof and dustproof design ensures safe usage and long service life in industrial, household and horticulture ventilation applications. Such as bathroom, washroom, office, grow tent
SaleBestseller No. 5

VIVOSUN 4 Inch Inline Duct Fan 100 CFM, HVAC Exhaust Ventilation Fan with Low Noise for Basements, Bathrooms, Kitchens and Attics, Silver

  • Durable: The fan has a strong motor which features a permanently lubricated bearing that operates quietly and requires no maintenance
  • Compact But Efficient: This duct fan is compact and lightweight enough to be installed in areas with little available space; With a diameter of 4 inches, speed of 2930 RPM and 100 CFM air flow
  • Low Noise: Superior balanced centrifugal impeller for long service life & quiet operation; A less than 30 dB noise level does not have any harm and will not disturb your work
  • Wide Applications: You can have it in bathrooms, kitchens, workshops, basements, attics and etc, in order to boost airflow in HVAC systems; Also, it can be used in grow rooms as intake fans or exhaust fan
  • Specifications: Voltage 110/120V, Power 14W; Max Operating Temp of Motor is 130℃ / 266℉; Max Ambient Temp is 60℃ / 140℉; Note: Please turn the fan off immediately if the blades get stuck by other objects
Bestseller No. 6

AC Infinity CLOUDLINE LITE A4, Quiet 4” Inline Duct Fan with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

  • Designed to quietly ventilate grow tents, exhaust odors, transfer heating/cooling to rooms, and cool AV closets.
  • Features the same build quality and innovations as the CLOUDLINE Series delivered in a value package.
  • Includes a wired 10-speed fan controller; also compatible with all CLOUDLINE Series smart controllers.
  • Mixed flow design combined with an EC-powered motor for a truly quiet and energy efficient performance.
  • Duct Size: 4" | Dimensions: 6.9 x 11.9 x 7.4 in. | Airflow: 165 CFM | Noise: 29 dBA | Bearings: Dual Ball
Bestseller No. 7

iPower 4 Inch 230 CFM Inline Duct Ventilation Fan Quiet Vent Blower for Hydroponics Grow Tent, Greenhouse Air Circulation, Upgrade, Black

  • Effective Ventilation: Quiet and efficient design with a fan speed of 2600 RPM for an air flow of 230 CFM. Powerful blower to move air to your target location for optimal ventilation
  • Low noise: Equipped with a flow deflector that makes the fan airflow more concentrated and reduces the turbulence energy. Run at only 36.4 dB noise level to ensure the grow operation won’t disturb your life
  • Simple installation: Removable intake and exhaust ends with locking tabs for simple and easy hookup. Easy to install, quick to remove and convenient to maintain. The cable length is 5.9 feet and can be easily set
  • Premium design: Lightweight and compact fan takes up minimal space and fits in any grow room. High-quality blades and efficient flow deflector increase airflow while realizing smooth, whisper-quiet operation
  • Wide applications: Suitable for grow tent, greenhouse, basement workshops, bathroom or kitchen. Clean and freshen air. Keep environment humidity and temperature balanced
Bestseller No. 8

AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan with Temperature Humidity Controller, Bluetooth App - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

  • Designed to ventilate hydroponic grow rooms, transfer heating/cooling, cool AV closets, and exhaust odors.
  • Dynamic temperature and humidity programming, with timers, grow cycles, scheduling, minimum speed.
  • Connect with our app via Bluetooth to access advance programs, alarms, notifications, and view climate data.
  • Mixed flow design combined with a PWM-controlled EC-motor for a truly quiet and energy efficient performance.
  • Duct Size: 4” | Dimensions: 6.9 x 11.9 x 7.4 in. | Airflow: 205 CFM | Noise: 28 dBA | Bearings: Dual Ball
SaleBestseller No. 9

iPower 4 Inch 130 CFM Inline Duct Fan with Variable Speed Controller HVAC Quiet Exhaust Blower for Heating Cooling, Grow Tents

  • Upgraded Fan: Size: 4inch; fan speed: 2500 RPM; air flow: 130 CFM; wind pressure: 220 pa; bearings: double ball. 110V standard household plug; Pre-wired 5.9 feet power cord. Max Ambient Temp is 140℉/ 60℃
  • Speed controller: Three speed switches enable fan to run at low, medium and high speed. Durable 3-pole grounded plug need no extra wires to deal with. You can correctly and precisely adjust the airflow level according to your requirement
  • Easy installation: Feature with lightweight and compact enough to be installed in any angel and little availvable areas. Simply remove the duct ends with locking tabs for quick installation and easy maintanance
  • Mixed flow design: Compared with axial and centrifugal fans, mixed flow fan has large air volume and high static pressure for ventilation and purification. Durable plastic housing and blades revolve smoothly and powerfully and cut noise output to 35 dB
  • Safe and versatile applications : Fully enclosed junction box, waterproof and dustproof design ensures safe usage and long service life in industrial, household and horticulture ventilation applications. Such as bathroom, washroom, office, grow tent
Bestseller No. 10

iPower 4 Inch 90 CFM Inline Fan Duct Exhaust Booster with Speed Controller for HVAC in Grow Tent, Basements, Bathrooms and Kitchens

  • Variable speed controller: Enable you to adjust the speed and airflow of the fan. Note: Please turn the fan off immediately if the blades get stuck by other objects and turn on after clean.
  • Efficient and high safety: Feature a diameter of 4 inches, speed of 3200 RPM and 90 CFM air flow. With insulating coating, high safety factor. Portable, lightweight and easy to install.
  • Durable: Superior balanced centrifugal impeller for long service life. The motor features a permanently lubricated bearing that operates quietly and requires no maintenance. Note: Not enclosed motor, not used in high humidity environments.
  • Wide application: Used as intake fan to bring fresh air into grow rooms, help to boost airflow in HVAC units to remove exhausts and odors from workshops and ventilate basements & attics, etc.
  • Specification: Voltage: 110-120V; Wattage: 15W; Power Cord: 4.9FT. Max operating temp of motor is 130℃ / 266℉; Max ambient temp is 60℃ / 140℉.

How to Buy the Best 4 inline fan

When buying 4 inline fan, you might feel like you have no idea where to start. You don't have time to waste on products that don't live up to their promises or are just plain bad. But don't worry! We're here to help you make informed decisions about which product is right for you, and we've put together a list of things to consider when choosing a product:

  • Does it work? The most important thing is that the product delivers on its promise. If it doesn't work, then what's the point? Read reviews and do your research before making a purchase 4 inline fan.
  • Is it safe? When buying 4 inline fan, it's important to consider safety, especially beauty products! Make sure you look into how safe the ingredients are, how easy they are to use, and whether or not they're compatible with other products in your routine.
  • Is it worth it? Consider how much you want to spend on each item, and ensure that amount fits within your budget. Also, consider whether or not the price is more than what would be considered “reasonable” for its quality level.

Here are some tips to help you find the right product for your needs:

Read reviews

It's important to read reviews before making purchases online because they can help guide you toward products that others have enjoyed using. They also give you an idea of how certain durable products are over time which is important when considering whether or not something will last long enough for its price tag.

Research

The second step is to do your research. Find out what other people have said about 4 inline fan and what they like or dislike about it. Pay attention to the reviews, too – if many people say the product breaks easily or doesn't work as expected, that might be a red flag for you! And if everyone loves it, then maybe that's exactly what you need!

Price

Check out multiple options and compare prices before making your final decision on 4 inline fan. A higher price tag doesn't necessarily mean better quality. Just because something is more expensive doesn't mean it's worth buying!

Material

Check what materials are used in manufacturing products before purchasing them. The last thing you want is your tools to break after just one use! We recommend going with a company that uses high-quality steel or other durable materials for 4 inline fan; you'll be glad you did when your new tool lasts longer than expected!

Warranty

It's always better if there is one! This doesn't just protect your investment; it also gives peace of mind knowing that if something goes wrong with your product after purchase, there's no need to worry about replacing it because of a defective part or other error on the company's end.

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