Top 10 Quietest 4 Inch Inline Fan Systems for Grow Tents

Though there are many products in the segment of 4-inch inline duct fans, you will find it hard to get the quietest 4 inch inline fan. This is because most of the powerful fans out there make disturbing sounds. And the ones that are quiet in operations may not fulfill all other requirements.

To help you avoid such a hassle, we have done extensive research on 4-inch inline duct fans. In the end, we have successfully come out with 10 of the best fans that are capable of providing super quiet operations. Let’s get one of them for your grow tent.

Quick Picks: Top 5 Quiet 4-Inch Inline Fans Comparison Table

Preview
Top Pick
VIVOSUN Air Filtration Kit: 4 Inch 203 CFM Inline Fan with Speed Controller, 4'' Carbon Filter and 8 Feet of Ducting Combo
Runner-Up
AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan with Temperature Humidity Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics
Also Great
iPower GLFANXINLINE4 4 Inch 190 CFM Inline Duct Ventilation Fan HVAC Exhaust Blower for Grow Tent, Grounded Power Cord, 1-Pack, Silver
VIVOSUN 4 Inch 190 CFM Inline Fan with Speed Controller, 4 Inch Carbon Filter and 8 Feet of Ducting for Grow Tent Ventilation
BloomGrow 4'' Inline Fan Carbon Filter Ducting Combo + Fan Speed Controller + 24 Hour Timer Outlet+Thermometer Ventilation System for Grow Tent Kit (4'')
Title
VIVOSUN Air Filtration Kit
AC Infinity CLOUDLINE T4
iPower FLFANXINLINE4 Inline Fan
VIVOSUN 190CFM Inline Fan
BloomGrow 4” Inline Fan
Airflow
203 CFM
205 CFM
190 CFM
190 CFM
Not Specified
Power
68 Watts
Not Specified
Not Specified
Not Specified
Not Specified
Noise
49 dB
28 dB
48 dB
Not Specified
48 dB
Ratings
-
-
-
-
-
Reviews
-
-
-
-
-
Prime
Price
$104.99
$119.00
$57.80
$104.88
$145.07
Top Pick
Preview
VIVOSUN Air Filtration Kit: 4 Inch 203 CFM Inline Fan with Speed Controller, 4'' Carbon Filter and 8 Feet of Ducting Combo
Title
VIVOSUN Air Filtration Kit
Airflow
203 CFM
Power
68 Watts
Noise
49 dB
Ratings
-
Reviews
-
Prime
Price
$104.99
Runner-Up
Preview
AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan with Temperature Humidity Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics
Title
AC Infinity CLOUDLINE T4
Airflow
205 CFM
Power
Not Specified
Noise
28 dB
Ratings
-
Reviews
-
Prime
Price
$119.00
Also Great
Preview
iPower GLFANXINLINE4 4 Inch 190 CFM Inline Duct Ventilation Fan HVAC Exhaust Blower for Grow Tent, Grounded Power Cord, 1-Pack, Silver
Title
iPower FLFANXINLINE4 Inline Fan
Airflow
190 CFM
Power
Not Specified
Noise
48 dB
Ratings
-
Reviews
-
Prime
Price
$57.80
Preview
VIVOSUN 4 Inch 190 CFM Inline Fan with Speed Controller, 4 Inch Carbon Filter and 8 Feet of Ducting for Grow Tent Ventilation
Title
VIVOSUN 190CFM Inline Fan
Airflow
190 CFM
Power
Not Specified
Noise
Not Specified
Ratings
-
Reviews
-
Prime
Price
$104.88
Preview
BloomGrow 4'' Inline Fan Carbon Filter Ducting Combo + Fan Speed Controller + 24 Hour Timer Outlet+Thermometer Ventilation System for Grow Tent Kit (4'')
Title
BloomGrow 4” Inline Fan
Airflow
Not Specified
Power
Not Specified
Noise
48 dB
Ratings
-
Reviews
-
Prime
Price
$145.07

Our Top 10 Picks of the Quietest 4 Inch Inline Fan Units

Though you have decided to buy a particular size of inline fan for your grow room, there is something more to consider about an inline fan. To help you out in this regard, we have discussed every important piece of information about inline fans. This will help you come out with the right product.

1. VIVOSUN Air Filtration Kit | Best Overall 4 Inch Inline Fan for Quiet Operations

SaleTop Pick
VIVOSUN Air Filtration Kit: 4 Inch 203 CFM Inline Fan with Speed Controller, 4'' Carbon Filter and 8 Feet of Ducting Combo
  • ADVANCED MADE EASY: Don’t waste time buying and returning parts that may or may not be compatible or safe to use together! Three-part system includes every part you need to get set up.
  • POWERFUL INLINE FAN: Power: 68W Current: 0.62A Noise Level: 49 dB; Fan speed: 2500 rpm 110V/60HZ; ETL recognized components.

While you have decided to buy the quietest inline fan out there, VIVOSUN Air Filtration Kit is the perfect choice for you. The carbon filter of the fan is 4 inches in length, so it is an ideal size to go with.

The powerful fan is 68W requiring 0.62A current while running. And it can run at a very high speed generating approximately 2500rpm. Therefore, there is no chance to question its capability in providing robust performance.

The components of the inline fan are ETL recognized. Thus, the product is undoubtedly a durable fan. Even the design of the product provides extra benefits to make it long-lasting. For instance, the carbon filter of the fan comes with a premium design with a 53 percent open area.

You will get a couple of stainless clamps and a sturdy ducting in the fan. And to support the duct walls, the product comes with flexible, strong wires, which are made of steel.

Key Features of the Product

  • 4-inch carbon filter
  • 203 CFM
  • 8’ ducting combo
  • 49 dB sound
  • 2500 rpm fan speed
Pros and Highlights
  • The inline fan is highly energy-efficient to use in a grow room.
  • It doesn’t make any disturbing noises while operating.
  • The carbon of the fan is capable of providing a hundred percent filtered airflow.
  • You will get a speed controller with the fan.
  • The fire-retardant aluminum of the ducting can handle -22 to 266 Fahrenheit temperature.
Cons and Flaws
  • There is no considerable flaw in the performance of the fan.

Check Price on Amazon

 

2. AC Infinity CLOUDLINE T4 | Best Inline Fan for Hydrophonic Grow Tents

Runner-Up
AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan with Temperature Humidity Controller - 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.
  • Intelligent controller with temperature and humidity programming, fan speed control, timer, and alarm system.

AC Infinity CLOUDLINE T4 is another outstanding inline fan in the 4-inch segment. The fan is capable of controlling both temperature and humidity in any type of grow tents, especially in hydroponic grow tents.

The product comes with an intelligent controller to help you maintain humidity and temperature without any hassle. Apart from the controller, the fan has a timer and an alarming system.

If you are a big fan of energy-efficient electronics, you will certainly fall in love with the product. The fact is that the design of the fan is a combination of PWM-controlled DC motor and EC motor.

At the time of operation, the fan can provide 205 CFM airflow. In spite of offering such a strong airflow, it doesn’t make any irritating noise. To be specific, it makes only 28 dBA noise while running.

Key Features of the Product

  • Specialized for hydroponics
  • 205 CRM airflow
  • 2 duct clamps
  • Sensor probe
  • Mounting hardware
Pros and Highlights
  • The robust inline fan exhaust odors to give you a favorable environment.
  • The timer and the alarming system of the fan will make your job easy.
  • It will help you control both humidity and temperature in your hydroponic grow room.
  • Though it offers robust performance, it doesn’t make disturbing sounds.
  • The product is an energy-efficient 4-inch inline fan.
Cons and Flaws
  • It is not capable of providing high CFM.

Check Price on Amazon

 

3. iPower FLFANXINLINE4 Inline Duct Ventilation Fan | Best Vibration-Free Fan

Also Great
iPower GLFANXINLINE4 4 Inch 190 CFM Inline Duct Ventilation Fan HVAC Exhaust Blower for Grow Tent, Grounded Power Cord, 1-Pack, Silver
  • 190 CFM; Noise Level: <48dB; 110/120V standard household plug; Pre-wired 5 Feet power cord
  • Quality components for quiet operation. Composite fan blades and center hub which reduces noise and vibration

There are some inline fans that offer quiet operations, yet they are incapable of providing vibration-free performance. iPower FLFANXINLINE4 is exceptional in this regard. The fan is the best choice when you are in search of a vibration-free inline fan.

The fan is a corded electric device, so it won’t cost you much energy while operating. And it comes with a 110/120v household plug. However, the fan has a center hub and composite blades for quiet and vibration-less operations.

If you find it troublesome to do the maintenance job, this product can be the best pick for you. This is because the fan requires you zero maintenance for its lubricated bearings and ceramic-coated shells.

No matter whether you clean air or manage temperature, you can use the fan for industrial, horticulture, and household ventilation. By the way, the fan can ensure a maximum of 176 degrees Fahrenheit ambient temperature. Keep it in mind before making an approach.

Key Features of the Product

  • 190 CRM airflow
  • Less than 48 dB sound
  • Corded electric power
  • Ceramic-coated
  • Lubricated bearings
Pros and Highlights
  • The fan doesn’t make any vibrations while operating.
  • It doesn’t require any maintenance as it has high-quality components.
  • The price of the inline fan is highly cost-effective.
  • You can use it for both industrial and household purposes.
  • It is a durable fan for its ceramic coating and premium design.
Cons and Flaws
  • The CFM is comparatively low for a large grow room.

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4. VIVOSUN 190CFM Inline Fan | Best Odor-Controlling Fan

VIVOSUN 190CFM Inline Fan
  • EFFECTIVE VENTILATION: Powerful blower with a fan speed of 2300 RPM for an air flow of 190 CFM. Moves air through your target location efficiently for optimal ventilation
  • SUPERIOR CARBON FILTER: 1050+ RC 48 Australian Virgin Charcoal Bed. Dimensions: 4" x 14"

When you are looking for an effective inline fan that has zero-tolerance against odor, VIVOSUN 190CFM Inline Fan wins the race. No matter whether you have a hydroponic or an indoor grow room, the fan fits all types of environments to control pungent smells.

The fan has a powerful blower, which can provide 2300 rpm speed and 190 CFM airflow. The top-notch carbon filter of the fan is one of the most robust ones in the arena, so the fan faces no problem to ensure high speed.

The stainless clamps and the ducting are so robust that they can ensure easy handling of up to 266 Fahrenheit temperatures. In order to control such a high temperature, the fan has fire-retardant aluminum layers as well.

With an 8’ ducting, the 4-inch carbon filter can operate very smoothly. That said, there is nothing to worry about disturbing noise and vibration while running the fan in your grow room.

Key Features of the Product

  • 190 CFM airflow
  • 8’ ducting
  • Stainless clamps
  • 2300 rpm speed
  • Heavy-duty performance
Pros and Highlights
  • The fan ensures 2300 rpm speed for effective ventilation.
  • It is an energy-efficient inline fan to save extra bills for grow rooms.
  • It is made up of premium quality components to make it a durable fan.
  • It enables you to control both temperature and humidity.
  • You will find it extremely easy to install the fan into your grow tent.
Cons and Flaws
  • The price is a little bit high.

Check Price on Amazon

 

5. iPower GLFANXINL4FILT4M | Best Inline Fan with Pre-Filter

Sale
iPower GLFANXINL4FILT4M
  • 4 Inch 190 CFM Duct Inline Fan Blower: Made with quality components for quiet operation. Composite fan blades and center hub which reduces noise and vibration
  • 4 Inch 1050+ IAV Australia Charcoal Filter: One of the world's most absorbent carbon available; Dimensions: 4" Flange Ducting x 12" Length; Reversible flange

Having  a1050+IAV charcoal filter, iPower GLFANXINL4FILT4M has proved to be a robust inline fan for grow tents. The carbon of the fan is the most effective in absorbing moisture. Thus, the fan can ensure the most favorable environment for different plants in grow rooms.

It is a multi-functional device, which eliminates odors, removes heat, and solves all the issues related to air delivery. While offering these facilities, the fan makes neither noise nor vibration.

One of the most interesting facts about the fan is that it comes with a free pre-filter. The pre-filter helps your main carbon filter to remain safe and sound. By the way, you need to change the pre-filter every 6 months.

The product has premium quality components to make sure it provides the best performance without causing any trouble. For instance, the product has robust composite blades and a handy center hub to make operations favorable.

Key Features of the Product

  • 190 CFM airflow
  • Top-notch components
  • Free pre-filter
  • 1050+IAV charcoal filter
  • Mult-functional
Pros and Highlights
  • The fan doesn’t compromise while removing bad smells from the environment.
  • The pre-filter of the fan protects the main filter from damage.
  • It can solve all types of air delivery issues out there.
  • It doesn’t cost you extra bucks to spend on the maintenance job.
  • It is the most absorbent inline fan in the world.
Cons and Flaws
  • The fan doesn’t offer variable speed.

Check Price on Amazon

 

6. BloomGrow 4” Inline Fan | Best Environment-Friendly Fan

BloomGrow 4” Inline Fan
  • BloomGrow Inline Fan Carbon Filter Ducting Combo + Fan Speed Controller + 24 Hour Timer Outlet+Thermometer Ventilation System for Grow Tent Kit
  • Filter:Use Coal Based activated carbon environmentally friendly materials and Carbon Layer Thickness: 1.5 inches. Pre-filter included,Cleaner air to promote better health.

BloomGrow 4” Inline Fan is a nice choice for those who are environment lovers. The fact is that it has a coal-based carbon filter, which helps the device to keep away from environmental pollution.

To control the speed of the fan, it has an auto controller. The controller will enable you to run the fan at variable speed. To be specific, you can run the fan at high, medium, and low speed according to the needs of your grow room plants.

You will get a hygrometer along with the fan, and the meter can show results in both Degree F and Degree C units. The meter will also show you time, date, and month.

The fan is flexible to use from the top of your desk or wall hanger. Wherever you place it, you will always get the same output from the fan. However, the maximum wattage of the fan is 1800w.

Key Features of the Product

  • Coal-based carbon
  • Speed controller
  • 24-hour timer
  • Thermometer ventilation
  • Hygrometer
Pros and Highlights
  • The carbon filter of the inline fan is environment-friendly.
  • The fan will enable you to enjoy the facility of variable speed.
  • It is capable of providing results in both Celsius and Fahrenheit units.
  • It is flexible to place anywhere you want.
  • You will find the fan extremely easy to install without prior knowledge.
Cons and Flaws
  • The fan might be a little bit noisy.

Check Price on Amazon

 

7. Hydro Crunch 4 Inch Booster Fan | Quietest Inline Fan for the Money

Hydro Crunch 4 Inch Booster Fan
  • Comes complete with Hydro Crunch 4" Booster Fan, 4" Carbon Filter and 4" Ducting with Clamps
  • 4" 100 CFM Booster Fan

If you are in a tight budget while looking for the quietest 4 inch inline fan, Hydro Crunch 4 Inch Booster Fan is the perfect choice for you. As a matter of fact, the fan is a great inline fan for small hydroponic grow rooms.

The complete kit includes a 4-inch ducting, a 4-inch carbon filter, and a 4-inch booster fan. The carbon filter, by the way, is a charcoal filter. Therefore, you will be able to keep yourself away from air pollution.

When you run the fan for a long time, you have nothing to worry about the heat generated by itself. The fact is that the fan has aluminum ducting, which is uninsulated, to remove all the heat from the fan’s system.

Apart from heat-absorbing performance, the fan also offers odor-free operations. Thus, you can keep your privacy as the fan is neither noisy nor smelly. Moreover, it doesn’t vibrate at the time of operating.

Key Features of the Product

  • 100 CFM airflow
  • For hydroponic rooms
  • Charcoal filter
  • Aluminum ducting
  • A couple of clamps
Pros and Highlights
  • The product is the most reasonable inline fan for quiet operations.
  • It doesn’t require high energy to run smoothly.
  • It has a strong ability to control all types of bad smells.
  • There is a program to control the heat of the system.
  • It comes with a fire-resistant coating for maximum safety.
Cons and Flaws
  • The fan is not so powerful.

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8. Tjernlund M-4 Metal Inline Ducting Fan | Best for Exhausting High Moisture

Capable of handling high-pressure airflow, Tjernlund M-4 Metal Inline Ducting Fan wins the race in the field of high moisture-absorbing inline fans. The fan is also renowned for its long-running ability.

In spite of featuring sturdy performance, the fan doesn’t cost you much energy. In fact, it is one of the most energy-efficient inline duct fans out there. And you will face no failure in the power supply when you run the fan for a long time.

Once you have the fan in your grow tent, there is nothing to worry about the lingering odors. The fan fights odors with an iron hand, so they can’t linger around the grow room.

The fan won’t make you fall into any trouble regarding fitment. The fact is that it has a strip of isolating foam. Not only does the foam facilitate fitment, but it also reduces the chance of vibration.

Key Features of the Product

  • 200 CRM airflow
  • 100 watts
  • Mounting bracket
  • Handy cord
  • Premium components
Pros and Highlights
  • The fan is an excellent choice for heavy-duty grow rooms.
  • When you run the fan at full speed, it will make no vibration.
  • The exhaust end of the fan is considerably quiet and smooth.
  • It doesn’t slide around once you install it properly.
  • It can remove all types of bad odors from the surroundings.
Cons and Flaws
  • The quality of the bracket is not optimum.

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9. TopoLite 4” Inline Fan | Best 4-Inch Inline Fan for Static Pressure

TopoLite 4” Inline Fan
  • Come completely wired with junction box, strain relief and power cord and low noise
  • Durable ceramic-coated. Composite fan blades and center hub which reduces noise and vibration

TopoLite 4” Inline Fan is renowned for providing static pressure. And for its static pressure, the fan can overcome resistance from long ducting. That is why people around the world tend to buy this fan for heavy-duty jobs.

The fan is capable of providing 176 CFM airflow, while it can run at 2580 RPM. Therefore, there is no chance to question the efficiency and power of the inline fan.

For your convenience, the fan is completely wired and has a long power cord. Besides, the product comes with a junction box with secure connections, so the fan is completely safe for use.

The center hub and the composite blades of the fan are of top-notch quality. As a consequence, the fan neither vibrates nor makes any disturbing sounds at the time of operations. Moreover, it can remove all the bad and harsh smells out there.

Key Features of the Product

  • 176 CFM airflow
  • 2580 RPM revolutions
  • Less than 51 dB noise
  • 70” power cord
  • 0.73 Amps current
Pros and Highlights
  • You can use the inline fan for both domestic and commercial purposes.
  • You can place the fan either horizontally or vertically without any trouble.
  • The fan is easy to install for its extended collar and duct hook-up.
  • It can perform constantly without making noise and vibration.
  • It is capable of absorbing extensive heat from the system.
Cons and Flaws
  • The product doesn’t include filters.

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10. Can RS4HO Centrifugal Fan | Best High Output Centrifugal Inline Fan

Centrifugal inline fans provide outstanding results when you use them in grow rooms. That is why growers across the world have a great interest in this type of fan. And Can RS4HO Centrifugal Fan is the only deserving product in the field.

The fan is excellently sturdy in providing stormy airflow. To be specific, it can ensure approximately 165 CFM airflow in every environment. Though it is so robust in the scale of CFM, it won’t cost you extra energy. The fact is that it requires up to 75 watts to run.

This 4-inch inline fan, however, can generate about 2,600 rpm, which is undoubtedly excellent revolutions. In fact, the performance is more than enough for a commercial grower.

The fan has a reliable rotor motor to make you satisfied with its super speed. And the most interesting thing is that you have the opportunity to control the speed of the fan. That said, the speed of the fan is completely controllable.

Key Features of the Product 

  • 165 CFM airflow
  • 2600 rpm revolutions
  • 75 watts
  • Centrifugal fan
  • Rotor motor
Pros and Highlights
  • The fan enables you to control its speed according to your requirements.
  • You can use the fan for both commercial and residential applications.
  • It will save your bills as it is highly energy-efficient.
  • It doesn’t make any trouble in providing continuous airflow.
  • The price of the fan is cost-effective.
Cons and Flaws
  • It may vibrate a little bit while running.  

Check Price on Amazon

 

Most Frequently Asked Questions about Inline Fans

Having a premium quality inline fan in your grow room is a must. But if you don’t have any previous experience in this field, you will come up with numerous questions in your mind. And to quench the thirst for unknown information, we have compiled some of the most frequently asked questions. Let’s know what they are.

1. Do inline duct fans work?

This is one of the most common questions asked by newbies. To speak the truth, inline duct fans are excellent in providing the results you expect for. They can provide you with a balanced temperature and humidity in your grow room. If you compare them with axial fans, they will certainly come out being the most powerful. Moreover, inline fans are quieter than other types of fans.

2. What size inline fan for 4×4 grow tent should I get?

Before buying a 4-inch inline fan, you must make sure whether this is the appropriate size for your grow tent. Well, you should consider another factor in this regard. The inline fans that are capable of providing approximately 200 CFM are great to go for a 4×4 grow tent. Therefore, you must make sure that your chosen 4-inch inline duct fan can provide such a strong result. Otherwise, you should avoid the fan.

Wrap-Up

Buying the best inline fan from the market is not all. You need to take proper care of the fan in its service period if you want to get a long-time service. In addition, you must take some important factors into consideration before getting your chosen fan.

This is because the quietest 4 inch inline fan can make you dissatisfied with some disturbing issues. Therefore, you must make sure the fan is capable of providing sufficient airflow without increasing your energy bills. You should also check whether it vibrates at the time of operations. If there is no issue with the two facts, then we recommend you get the fan without any hesitation.

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