Best Quiet 4-inch Inline Fans

Best Quiet 4-inch Inline Fans in 2021

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An inline fan is mounted inside the ductwork to bring the air from inside to the outside of a certain area. Previously, these fans were only used inside houses but now they are also being used for buildings that contain plantations inside them or factories. It is a great device to control the temperature of an area.

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They are great for providing proper ventilation to an area. The issue is that there are thousands of options available in the market. It is important that you are buying a quiet inline fan because you don’t want to deal with the constant noise.

We have done an extensive research to find out the best quiet 4-inch inline fans and we would provide you all the relevant details. With the help of all these details, you can find the option that is most suitable for you.

Comparison Table

Best Choice
AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan...
iGrowtek 4 Inch Inline Duct Ventilation Fan,Quiet Vent...
Fantech Rn2 Radon Fan + Install Kit (Black, 3x4)
iPower Silent 6 inch Booster Fan 174 CFM Quiet Inline...
SEAFLO 4" in-Line Marine Bilge Air Blower 12V 270 CFM...
TerraBloom 4" Silent Inline Booster Fan, 47 CFM, Intake...
AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan...
iGrowtek 4 Inch Inline Duct Ventilation Fan,Quiet Vent...
Fantech Rn2 Radon Fan + Install Kit (Black, 3x4)
iPower Silent 6 inch Booster Fan 174 CFM Quiet Inline...
SEAFLO 4" in-Line Marine Bilge Air Blower 12V 270 CFM...
TerraBloom 4" Silent Inline Booster Fan, 47 CFM, Intake...
Noise
28dBA
30dBA
28dBA
28dBA
36dBA
25dBA
Best Choice
AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan...
AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan...
Noise
28dBA
iGrowtek 4 Inch Inline Duct Ventilation Fan,Quiet Vent...
iGrowtek 4 Inch Inline Duct Ventilation Fan,Quiet Vent...
Noise
30dBA
Fantech Rn2 Radon Fan + Install Kit (Black, 3x4)
Fantech Rn2 Radon Fan + Install Kit (Black, 3x4)
Noise
28dBA
iPower Silent 6 inch Booster Fan 174 CFM Quiet Inline...
iPower Silent 6 inch Booster Fan 174 CFM Quiet Inline...
Noise
28dBA
SEAFLO 4" in-Line Marine Bilge Air Blower 12V 270 CFM...
SEAFLO 4" in-Line Marine Bilge Air Blower 12V 270 CFM...
Noise
36dBA
TerraBloom 4" Silent Inline Booster Fan, 47 CFM, Intake...
TerraBloom 4" Silent Inline Booster Fan, 47 CFM, Intake...
Noise
25dBA

Reviews of Top Quiet 4-inch Inline Fans

AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan

AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan...
  • Designed to ventilate hydroponic grow rooms, transfer heating/cooling, cool AV...
  • Intelligent controller with temperature and humidity programming, fan speed control,...
  • Mixed flow design combined with a PWM-controlled DC or EC-motor for a truly quiet and...

It is an inline fan that is extremely powerful and effective for ventilation. It is not just a simple fan because it comes with technological intelligence for temperature and humidity control. It has been programmed to sense these factors and transform its working accordingly. There is a fan speed control mechanism, timer, and alarm system available with this fan. The factor making it extremely quiet is the PVM-controlled DC or EC motor. This motor is not only quiet but also enhances the energy efficiency of the whole system.

This option is created for hydroponic grow rooms. If you are growing anything inside these grow rooms you need a system for proper ventilation and odor exhaust. This is a powerful fan with 21W of power usage and airflow of 205CFM. It produces a noise of 28dBA. When you are buying this fan you would get a corded sensor probe, AC power plug, 2 duct clamps, and mountain hardware in the package.

Overall, it is a great package because you are getting a quiet inline fan at an extremely affordable rate. It is also recommended for tents because a number of people are using them for growing various kinds of plantations. The reason why you should be using this option is that you need to provide the best possible growing environment to your plantations for getting the required profit and growth.

Another reason would be to make it easier to work in such an environment. Nobody likes to work in an area that is humid and filled with bad odor. It is easy to install and you wouldn’t need a lot of repairs even if you are using it for the long term. It would be a great one-time investment for the future.


iGrowtek 4 Inch 195 CFM Inline Duct Ventilation Fan

iGrowtek 4 Inch Inline Duct Ventilation Fan,Quiet Vent...
  • EFFECTIVE VENTILATION: Fan speed is 2600 RPM, Air flow is 75 CFM. Powerful blower for...
  • REASONABLE DESIGN: The light and compact fan takes up the smallest space; it can also...
  • LOW NOISE: The deflector makes the fan airflow more concentrated and reduces the...

This is one of the best quiet 4-inch inline fans in the market right now with a speed of 2500 RPM. It means that the motor rotates 2500 times per minute. It provides great airflow and ventilation for grow tents and in-house plantation settlements. It has an airflow of 195CFM and an extremely powerful blower. The powerful blower is essential for proper ventilation no matter where you are using this fan.

The best qualities of this option include an optimum design. The design of this fan makes it lightweight and it does not take a lot of space. It can be easily fitted in a compact space and it has a baffle action that improves the airflow along with making the whole process quieter. In order to ensure that it doesn’t make a lot of noise, there is a proper deflector installed with the fan that keeps the airflow concentrated and reduces the noise to only 30dBA.

It is designed for greenhouses, basements, kitchens, and tents. All of such places need proper ventilation and airflow. The temperature in these areas makes it harder to work inside and different kinds of odor can also be harmful especially in greenhouses for anyone staying inside for a number of hours. This is a versatile device that makes all of it extremely easier because of its efficiency.

Not only does it improve the temperature of the area but you can also control the humidity making it easier for everyone working in the area. Its versatility makes it a preferable choice among the rest of the options and that is why we have included it in our list. It is a multi-purpose device and you would not regret buying it.

It is easy to install as it has flanges on the intake and the end of the exhausts can be connected without any difficulty. We would suggest that you take professional help while you are installing it in any kind of area. Although the process is simple but still you shouldn’t take any chances. You also get a 5.9 feet cable along with the package that would make the installation process even simpler.

The long cable makes it available for wide space and you can easily set the exhaust in a way that it doesn’t mess with the temperature of the inner space. Once you have set it up you wouldn’t need any kind of technical assistance as it runs smoothly on its own. It would be suggested that you should clean it after a few months so that there are no dust or dirt particles creating a hindrance in the operation.


Fantech RN2 Radon Fan

Fantech Rn2 Radon Fan + Install Kit (Black, 3x4)
  • Fantech Rn2 Radon Fan
  • (2) Two Rubber Flex Couplings - choose color and size to fit your system
  • (1) One Manometer

It is one of the most stylish options with a glossy finish that you would find in the market related to the inline quiet fan options. It is available in white color with a standard pipe size and airflow of 123CFM. It is extremely useful for in-house plantations. It is really compact in size so you can even fit it in the kitchen. It would be suggested to increase the pipe size or use a cable of a longer size so you can accommodate the exhaust system properly.

Often there is a lot of heat and humidity generated inside a closed working space. When you are growing plants inside a tent it doubles the temperature because of the humidity and the constant work going on in the area. When you have to deal with such a situation and control the temperature you can take assistance from the Fantech RN2 Randon Fan.

You can control this device with the help of a button. The controls are pretty simple so any layman can use them and you don’t require any kind of professional help in this regard. It is equipped with vibration control and leak-proofing.

These qualities ensure that there is no leakage when you install it inside any kind of area and the noise is reduced as well. Its compact size also makes it reasonable to use when you want to accommodate a small area with temperature and humidity control. On the other hand, the noise reduction feature gives it a competitive advantage over other available options in the market.

The performance is not compromised which is the main requirement of any buyer who wants to make the environment more favorable for working. Installing it in your house can be really satisfying especially if you live in a humid region. The airflow of fresh air would bring a positive change in the environment around you and it is available at an extremely affordable rate. You can get it online from anywhere in the world. As the installation procedure is simple so it doesn’t matter where you live you would be able to install and use it.


iPower Silent Inline Duct Ventilation Booster Fan

iPower Silent 6 inch Booster Fan 174 CFM Quiet Inline...
  • Applications: help to boost airflow in HVAC units to remove exhausts and odors from...
  • Advantages: superior balanced blades for long service life & quiet operation; motor...
  • High safety: with insulating coating, high safety factor. Portable and lightweight;...

It is an effective solution for ventilation as it reaches a speed of 2350RPM. It is a powerful device that would be ideal for your home, tent plantation, basement, or greenhouse. The airflow of 95CFM makes it extremely efficient for optimal ventilation. As it is compact in size so you can even install it in your kitchen. It provides great airflow keeping the environment fresh and the temperature remains under control.

If there is humidity inside a working space it would be really difficult for anyone working there to provide optimal performance. In addition, if you have plants inside you would have to deal with added humidity. This wouldn’t be good for the growth of the plants as well. This is why you need this quiet inline fan that would offer the best performance and you would not have to suffer from any kind of humidity or temperature issue.

This fan has a really powerful blower with an aesthetic design. There is a deflector installed in order to reduce the noise and you would only have to deal with a maximum noise of 28dBA. The blades are balanced so it would be a long-term solution for you. It is a viable investment and it would serve you really well. It is easy to install and lightweight. The fan wouldn’t take a lot of space and there won’t be an issue when you are connecting the flanges with the exhaust ends.

This is an ideal option for a number of people because it would not only help you reduce humidity from a certain area but also remove the odor. The fresh air would be available inside the closed space and it would increase the growth of the plants or make it easier for anyone to work in the area.

It is available at a fair price and you can order it from anywhere in the world. Although it is designed to work in any kind of closed space, if you are from a region where the climate is hot and humid it would serve you in the best possible way. In such a climate you need all the help that you can get and this device is designed to assist you in this matter.


SEAFLO 4″ in-Line Marine Bilge Air Blower

SEAFLO 4" in-Line Marine Bilge Air Blower 12V 270 CFM...
  • Voltage: 12V DC, Flow capacity: 270 CFM (Cubic Feet per minute)
  • Current Draw: 6 Amp Draw, Suits 4" Diameter Hose
  • Provides ventilation for engine compartments, galleys, bilges and heads

It is a well-built inline air blower that offers ultimate performance in any kind of basement, greenhouse, kitchen, or plantation tent. As we have discussed above the need for proper ventilation and airflow in all of these areas. You need a controlled temperature for a number of plants and the increased humidity could become a killer for a number of plants.

There is no need to install a number of devices in order to achieve this. This is an option that would give you the power to achieve the optimum temperature. Apart from the temperature control you also need fresh air inside any closed space for better performance. You would not regret buying it because it is a powerful device.

It has an airflow of 270 CFM and a proper hose. You can use this device in any kind of closed space to get the required ventilation. It is made with ABS plastic and there are mounting brackets. As it is well-built which is one of the reasons why it is so effective you can see it as a long-term investment. You won’t have to buy a similar product for a while if you take care of cleaning and removal of dust particles inside the hose.

The design of the air blower is made keeping in mind the usage and all the dangers in different kinds of places. As there is humidity in the area so it is designed to be corrosion-free and water-resistant. Not only it is good for the environment but it also great for your pocket as you would not have to spend a lot of money. In addition, you would be able to get better profit or better working environment that is a big advantage in itself.


TerraBloom 4″ Silent Inline Booster Fan

TerraBloom 4" Silent Inline Booster Fan, 47 CFM, Intake...
  • IMPORTANT NOTE ON FAN USE: This is a Light Duty inline fan that Generates 47 CFM...
  • 4" (98 mm) INLINE FAN INCLUDES: 4 Inch (98 mm) Outside Diameter x 6 Inch Length Fan,...
  • HOUSEHOLD APPLICATIONS: This Premium Built Inline Fan Designed To Exhaust and Intake...

TerraBloom silent inline fan comes with 11 blades so it is quite evident that it is a really powerful device. Whether you want to use it for an in-house plantation, your basement, or kitchen you haven’t made a wrong choice in any way. Although it is not really powerful, it would provide great service in a compact closed space. It generates an airflow of 47 CFM which is less than any other option we have discussed above. Make sure that you are not using it for assisting carbon filter applications. These applications need powerful motors and this fan is not designed for such cases.

The inline fan comes with 8 feet power cable, mounting bracket, along with the necessary hardware. There is no need for any kind of professional help to operate it. Although we would suggest that you install it with professional assistance just to avoid any kinds of risk. It is built with premium material and it is designed for exhaust and intake of fresh air without creating a lot of noise.

Working at its full capacity it would only generate a maximum of 25dBA of noise. You would not even feel such a low volume of noise when you are working in the area. The temperature could be improved with the help of this device. Apart from the temperature, you would also be able to fight the humidity in the area.

As it provides proper airflow you do need to look at the speed. At maximum, the fan operates at the speed of 2250RPM. Do not use it in an area where the temperature is above 113F. Never try to use a fireplace because its power is not enough to deal with the heat in such a place. You just have to use its strengths in a suitable environment and you would receive the optimum results. Apart from all these benefits, it comes with a service warranty of 2 years so even if there is any issue you can get it resolved without paying a single penny.

If you want to learn more about the best silent fans, check our other article.

How quiet can an inline fan be?

inline fan

It is a really good question because you need to know exactly how much noise a fan would produce in order to select one of the options available in the market. Luckily, most of the manufacturers provide the details of the noise their device can produce at maximum.

It is scaled in dBA and we have mentioned it alongside every option we have discussed so far. Remember, this is the maximum noise a device would produce when it is working at full capacity. It means that you can encounter less noise as well depending upon the environment and the speed of the fan. All the fans we have mentioned are quiet and they produce a negligible amount of noise.

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