Top 5 Best Inline Duct Fans

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This is the story about my search to find the best inline fan. It is fun and healthy, in my opinion, to have an interior garden to provide fresh veggies and blooming flowers even through the cold winters. To maintain suitable air temperature and air quality, I use inline fans. The following incline fan reviews and ratings were written to help you narrow down your search for the best products available today.

The 5 Top Inline Fans

Editor’s PicksBrandRating *
Best ChoiceVIVOHOME 8 Inch Black Round Exhaust Inline Duct Fan ♥♥♥♥♥
Premium PickAC Infinity CLOUDLINE T4 Quiet 4-Inch Inline Duct Fan♥♥♥♥♥
Best ValueVIVOHOME 4 Inch Round Exhaust Inline Duct Fan for Hydroponics♥♥♥♡♡
Runner UpVIVOSUN 4 Inch Inline Duct Ventilation Fan Vent for Grow Tent♥♥♥♥♡
Honorable MentionTerraBloom Quiet 4-Inch Inline Duct Fan with Speed Controller♥♥♥♥♡
is made possible by its users.
When you buy a product through a link on our site, we may earn a commission. Learn More.

* Ratings are determined using our specialized rating system.

While there are many types of fans to choose from, including airflow fans, the best inline fan circulates the air to bring in outside fresh air or to exhaust interior air if the garden room becomes too hot. Here are my reviews of fans in the category of the best inline fan to help you decide which one is good for your needs.

★ Best Choice
Top 5 Best Inline Duct Fans 1Best Choice for Best Inline Fan: VIVOHOME 8 Inch Black Round Exhaust Inline Duct Fan

The VIVOHOME 8 Inch Black Round Exhaust Inline Duct Fan is the best inline fan because it is energy efficient and quiet. It also comes in three different sizes.

The high-quality VIVOHOME 8 Inch Black Round Exhaust Inline Duct Fan is designed to be used for indoor garden ventilation. The largest-size model of eight inches moves air at the rate of 735 cubic feet per minute (CFM), which is very powerful. The fan blades are bright red color so it is easy to see when they are spinning properly within the housing.

It has a black-colored body with a variable speed control installed in the middle of a power cord that is 5.4 feet long. The speed can be set for low, medium, or high. This design makes it easy to install the fan at the proper height, near a greenhouse ceiling or in the upper part of a wall, and still have the controls within reaching distance.

This is a good choice for the best inline fan because there are three sizes to choose from, which are four inches in diameter, six inches, and eight inches. I prefer the eight-inch model because of how powerful it is.

Pros

  • Energy efficient: At full speed, it uses 180 watts of electricity
  • Quiet: This fan operates at less than 31dB
  • Aerodynamic blades: The fan blades are balanced to reduce vibration

Cons

  • Durability: The plastic construction is a bit fragile and the fan should not be dropped
♛ Premium Pick
Top 5 Best Inline Duct Fans 2Premium Pick for Best Inline Fan: AC Infinity CLOUDLINE T4 Quiet 4-Inch Inline Duct Fan

The AC Infinity CLOUDLINE T4 Quiet 4-Inch Inline Duct Fan is the best inline fan because of its easy-to-use control panel and low noise level.

The AC Infinity CLOUDLINE T4 Quiet 4-Inch Inline Duct Fan is a top-of-the-line fan. Its superb control panel has an easy-to-read LED screen showing the room temperature and operational settings.

The controller allows the fan to be set to run automatically when the temperature exceeds a certain level. This is a good choice for interior hydroponic growing because of its accurate temperature-setting options. This variable speed fan has ten setting choices.

It comes with a connected precision sensor probe. The controls allow setting a timer with an alarm. The airflow produced by this fan is a substantial 205 CFM. The noise level is low at 28dB. It has dual ball bearings in the motor for smooth and fast fan blade rotation.

Pros

  • Controls: programmable for temperature, humidity, fan speed, time, and alarm
  • Installation kit: includes a sensor probe, AC power plug, two duct clamps, and mounting hardware
  • Automatic adjustment: adjusts airflow in response to humidity and temperature

Cons

  • Can shake on its highest speed setting
$ Best Value
Top 5 Best Inline Duct Fans 3Budget Choice for Best Inline Fan: VIVOHOME 4 Inch Round Exhaust Inline Duct Fan for Hydroponics

The VIVOHOME 4 Inch Round Exhaust Inline Duct Fan for Hydroponics is the best inline fan because it is small and powerful. It is made from a strong plastic material and automatically adjusts in response to humidity and temperature.

The VIVOHOME 4 Inch Round Exhaust Inline Duct Fan for Hydroponics is very inexpensive and powerful for its size. It can produce an airflow of 195 CFM. It is made from plastic and the fan blades are stronger ABS plastic. This is the solution for a powerful exhaust system that is done by monitoring the room directly. If you just want a low-cost solution that is powerful and you can turn this exhaust fan on or off when needed, this is the economically priced choice.

It is effective to use in places that create excessive heat such as kitchens, bakeries, and other places that need to have a constant flow of fresh outside air coming in. It is useful in grow tents to keep the air quality balanced with a constant air replacement. This fan can be used for inflatables to keep them filled with air.

Pros

  • Small size: the dimensions of this small fan are 6.7 inches by 7 inches by 7.3 inches
  • Low energy use: the 2,500 RPM motor uses 0.45 amps at 28 watts
  • Automatic adjustment: self-adjusts airflow in response to humidity and temperature

Cons

  • Single speed: This fan only runs at a single speed
♥ Top Pick
Top 5 Best Inline Duct Fans 7Runner Up for Best Inline Fan: VIVOSUN 4 Inch Inline Duct Ventilation Fan Vent for Grow Tent

The VIVOSUN 4 Inch Inline Duct Ventilation Fan Vent for Grow Tent is the best inline fan because of its durable and long-lasting motor, plus it is easy to set up and uses low energy.

The VIVOSUN 4 Inch Inline Duct Ventilation Fan Vent for Grow Tent is designed to be used for a grow tent and in greenhouses. It is lightweight and small, yet powerful. The 2,930 RPM of the fan blades provide 195 CFM of airflow. This fan runs at a single speed; however, a variable speed controller is available to buy separately.

The motor is durable and long-lasting with a centrifugal impeller that provides strong airflow with low noise. It can be used anywhere that improved airflow is needed to reduce humidity such as attics, kitchens, and basements.

Pros

  • Small: the dimensions of this small fan are 6.7 inches by 7 inches by 7.3 inches
  • Easy setup: comes with a 5.6-foot power cord and has flanges on both ends
  • Low energy: uses 0.12 amps at 28 watts
  • Airflow deflector: the airflow deflector concentrates the airflow to reduce noise to 30dB

Cons

  • Single speed: Must buy the optional variable speed controller to get more than one speed
♥ Top Pick
Top 5 Best Inline Duct Fans 8Honorable Mention for Best Inline Fan: TerraBloom Quiet 4-Inch Inline Duct Fan with Speed Controller

The TerraBloom Quiet 4-Inch Inline Duct Fan with Speed Controller is the best inline fan because of its quality construction and compact size. It includes a remote control and comes in two different models.

The best feature of the TerraBloom Quiet 4-Inch Inline Duct Fan with Speed Controller is the ability to accurately control the fan speed by a dial that goes from zero to 100%. By using the variable controller, you can set the fan speed at the perfect rate to move the airflow. At the highest speed setting, it moves 160 CFM of air.

There are two versions of this model. One has a fully variable controller that is wired to the fan. The other, which costs just slightly more, also has a wireless remote controller along with a variable control knob on the fan. With the remote control, there are six speed settings possible. The remote works from up to 50 feet away, even through walls, ceilings, and floors. This fan is well-made and has a metal casing with sturdy mounting brackets.

Pros

  • Quality construction: more durable metal construction when compared to plastic fans
  • Compact size: the dimensions of this fan are 7.2 inches by 6.3 inches by 5.9 inches
  • High pressure: built for use with carbon filters, it provides a maximum pressure of 334PA
  • Remote control: the optional remote control is a nice feature

Cons

  • Noisy: at the lowest speed, the fan is only 28dB but the noise at the highest speed is 56dB

Features to Consider for the Best Inline Fan

Here is a checklist of the features to consider when deciding which is the best inline fan.

Size

For some, size is a big consideration because they may have a small grow tent or even a tiny grow closet, and this limits the space available. The small fans are sufficient for promoting active air flow through these spaces.

Airflow

Airflow is a consideration if there is a need to move a lot of air. For example, if you are using an inline fan as a tool to remove stale air from a basement and reduce humidity, you will want a really strong fan that you can use to completely clear the room and bring in lots of fresh air. Also, if there is a heat dissipation problem, you will need to have a strong fan that moves enough air through the room to reduce excessive heat.

Construction

The lower-cost versions of inline fans are all made of mostly plastic. While this is fine, it is not as durable as the fans made with metal casings. If you need a fan that is more durable, then consider getting a metal one instead of one made from plastic.

Energy Efficiency

The cost of electrical energy is a big consideration for indoor growing. Check the amperage and the wattage of the fan, and then calculate how much electricity it will use per hour to know how much running it will cost. Certainly, a more energy-efficient fan is preferable if it delivers the same airflow as another fan that uses more energy to do the same job.

Controls

When it comes to having more control or less over air circulation, the choice depends on the growing conditions and the work efforts that are used to maintain the grow room’s environment. Some, like me, are very hands-on and like to spend time manually adjusting the settings while taking care of the plants. Others prefer to have a more automated system.

The best inline fan with more controls is more expensive but has features that may be very desirable, depending on your style. The advances in smart home technology are fantastic. It is possible now to integrate a grow room using the best inline fan with these overall smart home controls.

Benefits of Using Inline Fans

Growers of all kinds know that growing things outside depends very heavily on the climatic conditions. This is especially true in the northwest where I live. Too much rain and lack of sunshine can ruin an outdoor crop. Too little rain is just as bad. That is why many, including me, prefer growing inside where I have better control over the conditions using the best inline fan I can find.

Controlling temperature and humidity using the best inline fan are critical factors in growing healthy plants. When the humidity is too high, the plants can get covered with deadly mold and fungus. If the humidity is too low, then the plants dry out. The best inline fan is a critical tool to control the air quality for humidity and temperature.

Grow lights produce a lot of heat that needs to be dissipated by using a fan. The best growing conditions are maintained by having control over the airflow and by making sure the humidity and temperature inside the grow room stay within the ranges that are most beneficial for the types of plants you are growing.

Precautions of Using Inline Fans

Be sure to install inline fans properly and make sure that neither the intake nor the outtake is blocked in such a way that restricts airflow. Be careful with water, which does not mix well with electricity, to avoid getting a nasty shock. Run your power cords safely.

Most of these fans do not need any servicing during normal operations. They will run until they get worn out, and then, they will stop. Some like to buy low-cost fans and then buy a variable speed controller separately. With the remote control, it is possible to respond to room conditions without having to go into the grow room as long as you also have a monitoring system for temperature and humidity, which notifies you when there is a problem needing attention regarding air circulation in the hydrofarm.

Be careful when installing a fan, whether it’s an inline duct fan or a commercial exhaust fan, that you do not transmit any vibrations through contact with another thing such as metal ducting, because this can increase the noise level. To avoid any problems, get help with professional installation if you are not skilled in doing this work.

Conclusion

The best inline fan of my choice from this group is the VIVOHOME 8 Inch Black Round Exhaust Inline Duct Fan. My choice is based on the power of this eight-inch fan. I like it because it is much stronger than most of the other ones. It pushes a lot of air at the flow rate of 735 CFM when running at high speed.

I am always visiting and working in my inside garden room because it is my favorite place to be, so it is very easy for me to monitor what is going on in the room. When I need a full air refresh of the room, to bring it back into balance rapidly, I can turn up this fan to its highest setting and blow out all the air quickly. I can leave it on the lowest setting overnight or on a timer and not worry about it being too strong as well.

Much of your choice about the best inline fan will be guided by your gardening style and how much time you spend in the garden room. The less time you spend working in the room, the more you will need to have automatic monitoring, alarms, and remote control of the system. These considerations will strongly influence your choice of the best inline fan.