6 of The Quietest Inline Duct Fans You Can Buy Today

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For those who want to have a ventilated space inside, they may find that regular fans can run extremely loud which can cause a lot of irritation, especially if it is an area where you like to work.

Inline duct fans are great as they consistently circulate fresh air whilst also providing little to no noise. Thanks to their convenient size, they don’t take up much space and can easily be stored away when not in use.

With options varying from budget friendly models to higher end brands for those with the money to spend, there is something for everything. With the options provided in this guide, you can be assured that they run extremely quietly making them convenient and manageable. 

Here are the top 6 quietest inline duct fans on the market that you should consider:

OUR TOP PICK

AC Infinity CLOUDLINE S6, Quiet 6” Inline Duct Fan with Speed Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

Our top recommendation is the AC Infinity CLOUDLINE S6 which has been designed to ventilate grow tents, transfer heating or cooling rooms by circulating fresh air which can exhaust odors and cool AV racks making it an extremely functional and practical product.

It also features an 8 speed manual controller which utilizes PWM and also gives you temperature and humidity controls so you have complete control over the speed and power that the fan provides.

The mixed flow designed combined with an EC powered motor provides an extremely quiet and energy efficient performance. 

So what makes this our top pick? This fan comes with everything you need to set it up without having to worry about spending any money on further equipment.

The kit includes a corded AC power adapter, installation manual as well as all of the necessary mounting hardware.

The powerful airflow of 402 CFM means that this fan has an extremely powerful engine and the motor runs at less than 32dB making it highly convenient. 

Pros:

  • Features an 8 speed manual controller which utilizes PWM
  • The mixed flow designed combined with an EC powered motor provides an extremely quiet and energy efficient performance
  • This fan comes with everything you need to set it up without having to worry about spending any money on further equipment

Cons

  • Can take a little bit of time to quieten down after being switched on

EDITORS CHOICE

TerraBloom ECMF-150, Quiet 6' Inline Duct Fan with Variable Speed Controller – Ventilation Exhaust Fan for Heating Cooling Booster and Grow Tents

Our second selection is the TerraBloom Six Inch Inline Duct Fan which can be used in a variety of places including indoor growing facilities and vertical farms in order to heat and cool transfer, commercial dry and utilize air filtration applications.

The inline blowers can also create negative pressure environments, simulate wind and exhaust odors and smoke as well as providing fresh air from the outside.

This fan has been built with cutting edge brushless EC Motor and dual jet type blades and delivers a 350 CFM airflow rate using only 40 Watts at max speeds making it highly cost effective. 

This fan provides a unique flexibility of controls by allowing you to select your speed from 0 to 100% using the variable speed controller included with no background noise or hum at any speed.

Made from the highest quality materials, this fan has been coated in a steel housing that resists rust and protects the motor and blades from any accidental damage and harsh elements which reduces maintenance in demanding applications.

It comes with a 2 year warranty for extra convenience and guaranteeing its long term use. 

Pros:

  • The inline blowers can also create negative pressure environments, simulate wind and exhaust odors and smoke as well as providing fresh air from the outside
  • Provides a unique flexibility of controls by allowing you to select your speed from 0 to 100% using the variable speed controller included
  • Comes with a 2 year warranty for extra convenience and guaranteeing its long term use

Cons:

  • The fan can be hard to remount once it has been taken from the wall

BEST VALUE

TerraBloom ECMF-250, Quiet 10 Inch Inline Duct Fan with 0-100% Variable Speed Controller, ETL, Energy Star and HVI Certified. Metal Case, Energy Efficient EC Motor. Heating, Cooling, Booster, Exhaust, Filtration Applications

Our third choice is another from Terrabloom and is their 10 Inch Inline Fan which is ideal for those looking for a larger sized fan.

Made with the most advanced technology, this fan has a cutting edge brushless EC motor that can deliver a staggering 946 CFM making this one of the most powerful options on our list. 

Using 126 Watts at max speed, this fan is extremely cost effective making it a worthy investment in the long run.

Allowing you to fully control the speed thanks to the included variable speed controller, you can select any speed from 0 to 100% and be guaranteed no noise regardless of volume.

Like the majority of Terrabloom’s products, this fan has been designed and manufactured using only the finest materials.

With a coated steel housing which resists any rust whilst also protecting the motor and blades from any accidental damage and harsh elements, this fan is guaranteed to last a long time.

With little to no maintenance required, this product also comes with a 2 year warranty so you can have peace of mind. 

Pros:

  • Using 126 Watts at max speed, this fan is extremely cost effective 
  • Allows you to fully control the speed thanks to the included variable speed controller
  • Comes with a 2 year warranty so you can have peace of mind

Cons:

  • High price point

RUNNER UP

VIVOHOME 8 Inch 735 CFM Black Round Exhaust Inline Duct Fan with Variable Speed Controller for Indoor Garden Ventilation

Our fourth recommendation is the VIVOHOME 8 Inch Inline Duct Fan which combines the features and benefits of an axial and centrifugal fan which helps to effectively circulate air for room ventilation and odor purification.

With an easy assembly, the design of this fan is lightweight, durable and boasts a UV resistant plastic housing which guarantees long term use. For quick and easy installation, simply remove the duct ends with locking tabs.

With little to no maintenance required, the universal mounting bracket included is ideal for any direction of airflow. 

This fan also comes with a variable speed controller which has been designed within the 5.4 feet power cord. With a three speed switch that can run the fan at low, medium and high speeds, you can adjust the airflow level to your own personal preference.

The durable fan blades run smoothly and powerfully which help to collect the airflow volume and cut any noise output. With less than 31dB noise levels, your space will be free from any inconvenient sounds.

Great for both residential and commercial spaces, this is a multi purpose fan that is extremely versatile and will ensure fresh air circulation. 

Pros:

  • The design of this fan is lightweight, durable and boasts a UV resistant plastic housing
  • Quick and easy installation
  • Three speed switch can run the fan at low, medium and high speeds

Cons:

  • Slower speeds can create an audible vibration

RUNNER UP

Tjernlund M-6 Inline Duct Booster Fan, Hydroponic Blower Heat Air Conditioning Vent Exhaust, 460 CFM, 6'

Our fifth selection is the TJERNLUND M-6 Inline Booster Fan which is an extremely convenient 6 inch size making it ideal for smaller spaces. With a 460 CFM, this small sized fan packs a lot of power as it can cool a large amount of space.

It comes equipped with mounting brackets and hardware so you don’t need to worry about purchasing any extra products for installation.

This fan is particularly great for exhausting high moisture areas with ease thanks to the efficiency of the fan’s powerful engine.

With low noise and power usage, this fan is also highly cost efficient as it takes little electricity to run while also providing the convenience of a quiet engine.

What is great about this fan in particular is that there is an option to control the speed using a speed control device.

This device is not included with the purchase of the fan but is always an option for those who want to ensure that the fan is running to their personal preference. This can be especially helpful for those who are installing their fan in a smaller room. 

Pros

  • With a 460 CFM, this fan packs a lot of power as it can cool a large amount of space
  • This fan is particularly great for exhausting high moisture areas 
  • Highly cost efficient as it takes little electricity to run

Cons:

  • The bracket can become loose after long periods of use so make sure it is tightened correctly

RUNNER UP

iPower GLFANXINLINE4 4 Inch 190 CFM Inline Duct Ventilation Fan HVAC Exhaust Blower for Grow Tent, Grounded Power Cord, 1-Pack, Silver

Our final choice is the IPOWER 4 Inch Inline Duct Fan which boasts a noise level of less than 48dB. Easy to connect with a standard household plug, this fan has been pre wired with a 5 feet power cord for adjustable distance.

Made from quiet components which allow for quiet operation, this fan consists of composite fan blades and has a center hub which helps to reduce the levels of noise and vibration.

The body of the fan is made from a durable ceramic coat and has a permanently lubricated bearing which requires little to no maintenance. Sold at a great price point, this is ideal for people who are on a stricter budget but still want a high quality product. 

This fan removes heat from this system to solve air delivery problems without major system rework or expense. There is no chance of overheating after long periods of time because of this.

It is suitable for industrial, household and horticulture ventilation applications for clean air and temperature control making it extremely versatile in its use. With a warranty period of 12 months that comes with the purchase, you can have peace of mind with this fan. 

Pros:

  • Easy to connect with a standard household plug
  • Made from quiet components which allow for quiet operation
  • Ideal for people who are on a stricter budget

Cons:

  • Does not have enough flange to connect the duct to so extra tape is required for installment

Buyers Guide

When conducting your research, there are some factors that you need to consider before you make that important final decision. Before purchasing anything, always consider the space where the fan will be, the size of the room, the materials it is made from and the budget.

Once you’ve thought about all of these factors thoroughly, you’ll be in a position where you can make that decision with confidence. 

6 of The Quietest Inline Duct Fans You Can Buy Today

Space

The first thing to think about is the space where your fan will be located.

This feeds into how often you will be using the space as it can determine whether you want to spend the money on a higher quality product made from premium materials or want a cheap and cheerful option for infrequent, recreational use. 

Size

Following on from the space where your fan will be, the size of the inline duct fan is important as you want to ensure that it fits in the space and will also circulate plenty of fresh air.

If you purchase a small fan for a large room then there won’t be enough fresh air circulating whereas a larger fan in a small room might make it colder and overwhelming for the space.

Try to think about how long you’ll be using the space and how much space you wish the fan to take up before making that final decision.

Material

The material of the fan is incredibly important as this will determine the reliability and durability of the product. It goes without saying that the last thing anyone wants is to spend any amount of money on an item that breaks after a couple of uses and needs replacing.

All of the items in this article are for long term use and even the cheaper options are made from heavier duty materials. They all have a quiet running engine to ensure efficiency and a consistently low noise level.  

Budget

Lastly, always consider how much you have to spend on the fan. The options in this list vary from cheaper high quality models to more expensive fans from high end brands which are made from the highest quality materials.

It’s always worth thinking about how important it is to have a quiet inline duct fan and balance your criteria with the money you are willing to spend. With options for any price point, you’ll be experiencing the convenience of an inline duct fan in no time. 

Frequently Asked Questions

Are inline duct fans worth it?

Inline duct fans are worth it as they are both quiet and efficient.

A cheaper option than trying to enhance your existing duct system or trying to replace it completely, they can come at a variety of price points to suit all budgets. Inline fans are often designed to replace ductwork and can be hard wired into the furnace. 

Where should I put my inline duct fan?

In order to gain the best performance with as little noise as possible, make sure you are placing your inline duct fan about 6 to 10 feet away from the register where you wish to boost the air to.

You can use duct tape to prevent any air leaks from happening.