Home » Top 10 Best Inline Duct Fans in 2021 Reviews | Guide

Top 10 Best Inline Duct Fans in 2021 Reviews | Guide

by Dark Ereric
Inline Duct Fan

An inline duct fan is also referred to as a booster fan and is always attached to the duct for ventilation reasons. Basically, ducts are passages that are mostly used for heating, air conditioning, and ventilation. For that reason, after you have attached the fan to your duct, it will sustain proper ventilation in the confined rooms. If you are therefore looking to grow your plants indoors, or for any other reason, an inline duct fan will be the right choice.

Our expert team spent a lot of time researching and also testing different brands of inline duct fans. As per our selection criteria, below is a review of the best inline duct fans that you can consider to buy. Later in this post, we shall unveil the criteria with which we came up with the picks below. For now, let us get straight in the review;

List of Best Inline Duct Fans Comparison Table

#10. TerraBloom ECMF-150 Inline Duct Fan – Variable Speed

TerraBloom ECMF-150 Inline Duct Fan - Variable Speed

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This inline duct fan prides itself on quality EC motors allowing it to offer a very good flow of air. The good thing about this fan is that it only uses less power compared to conventional AC fans. You will also appreciate that the motors run on a computer chip allowing for precise adjustment of speed without any energy-wasting.

This fan has also been made in a compact and airtight design allowing it to fit perfectly in the tight grow tents. The design of these fans also allows them to handle high-pressure applications with carbon filters. The coated steel housing for these inline duct fans will ensure that they resist rust and also protect the blades from any accidental damage.

Key Features
  • Comes with a steel housing to resist rust
  • The brushless motor delivers 350 CFM rate of airflow
  • Operates on a quiet and controllable motor
  • Comes with a compact metal case

#9. AC Infinity RAXIAL Inline Duct Fan with Speed Controller

AC Infinity RAXIAL Inline Duct Fan with Speed Controller

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This booster fan comes with a matte black aesthetic to express its high quality and heavy-gauge construction. You will appreciate that it comes with a galvanized steel body with no folded seams to allow the fan to operate at very low noise without rattling. The fan also features some crimped ridges on its exhaust end for a tight and secure grip on the rigid or flexible ducting.

All models of this fan come with a speed controller that will optimize the flow of air and reduce the noise. It also comes with a soft rotating knob that will offer ease of operation and fast responses to the changing applications. Given that this fan makes use of balanced steel blades and well-lubricated ball bearings, this fan will eliminate the need for maintenance.

Key Features
  • Designed to increase the flow of air in the HVAC systems
  • Comes with a variable speed controller
  • Die-cast construction without welded seams
  • Features a solid steel body

#8. TerraBloom ECMF-100 Inline Duct Fan, Energy Saving

TerraBloom ECMF-100 Inline Duct Fan, Energy Saving

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Made with the best EC motors, these are very efficient fans that can deliver unprecedented airflow. The good thing is that they use 40 to 75% less power as compared to the AC fans. The motors operate on computer chips allowing for precise speed adjustments. You will also appreciate that these fans will never waste energy or heat.

As you are already aware, the space inside a grow tent is very tight. This is the reason why these fans come with a compact and airtight metal casing that its IPX4 ingress rated. The fans are basically made to handle the high-pressure applications while preserving room for the light fixtures. Among the applications that these inline duct fans find include indoor growing facilities and commercial drying.

Key Features
  • Used for the indoor grow facilities as well as the vertical farms
  • The blower delivers up to 160 CFM flow rate
  • Comes with a variable speed controller
  • Aluminum coated housing to protect it from rust

#7. TerraBloom 6″ Inline Duct Fan

TerraBloom 6 Inline Duct Fan

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This 6-inch fan is the real game-changer in the market of duct fans for several reasons. First, the fan delivers up to 188CFM air movement using just 26 watts power. This is about 30% savings as compared to similar fans of the same size. Based on the location, this fan basically pays for the energy-saving costs within one or two years.

When this fan is operating at full speed, you will appreciate that it only makes 39 dBa of noise to create a very quiet environment. You however need to be on the lookout knowing that the fan isn’t waterproof and is not recommended for outdoor applications. This brand stands behind its products and in this case, the inline duct fan comes with a 2-year warranty.

Key Features
  • Ideal for most household applications
  • It can be used in the grow rooms
  • Backed with a 2-year warranty
  • 39 dBa noise

#6. VIVOSUN 6-Inch Inline Duct Fan – Variable Speed Controller

VIVOSUN 6-Inch Inline Duct Fan - Variable Speed Controller

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This is a heavy-hitting blower whose fan speed is 2450 rotations per minute with an airflow of 440 CFM. It will be ideal for moving air through the target locations efficiently for optimal ventilation. The good thing about this fan is that it makes 50 dB noise meaning that it will run smoothly and quietly. It is actually fine-tuned to offer minimal vibration for a convenient operation.

This inline duct fan similarly prides itself on galvanized steel parts that will resist corrosion that comes from humidity. Its tight and precise construction will eliminate rattling and also reduce tear and wear to guarantee durability. You will also appreciate that this fan comes with a variable speed controller as well as dual flanges for a hassle-free hookup.

Key Features
  • Offers a powerful flow of air
  • The inline duct fan has a durable build
  • Runs smoothly and quietly
  • The fan has versatile applications
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#5. VIVOSUN 4-Inch Inline Duct Fan

VIVOSUN 4-Inch Inline Duct Fan

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This is yet another powerful blower with a speed of up to 2500 rotations per minute with a maximum flow rate of 195 CFM. With this fan, you will be able to target your location very efficiently for optimal ventilation. You will also appreciate that it comes in a lightweight and compact design meaning that it will only take up minimal space in the room.

The inline duct fan comes with an efficient flow detector that will increase the airflow while reducing the noise output. Apart from that, you will be happy to learn that this inline duct fan has a very simple installation. Owing to its versatile design, this fan will be ideal for lowering the temperature in grow rooms, kitchens, basements, and greenhouses.

Key Features
  • The fan speed is 2500 RPM
  • It has a low noise level
  • The inline duct fan has a simple installation
  • Lightweight and compact fan to occupy minimal space

#4. iPower 4-Inch Inline Duct Blower, Grey

iPower 4-Inch Inline Duct Blower, Grey

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One of the aspects that you will appreciate about this inline duct fan is that it has a versatile design. It will therefore find applications in the HVAC units to remove odors and exhausts from the grow rooms. The fan will also be ideal for household applications including the kitchen, bathroom, workshop, attics, and other places.

Owing to its premium ventilation, you will appreciate that the fan will quickly and very efficiently move vast amounts of air. This fan will be ideal for temperature control cooling for rooms that accumulate excessive heat. You will also appreciate that the motor features lubricated bearing to operate easily without any maintenance.

Key Features
  • It boosts airflow in the HVAC units
  • Offers premium ventilation
  • Long service life and a quiet operation
  • It requires no maintenance

#3. AC Infinity 4” Inline Duct Fan w/ Speed Controller

AC Infinity 4” Inline Duct Fan w: Speed Controller

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This inline duct fan is basically designed to ventilate the grow tents, exhaust odors, cool AV racks among other applications. You will appreciate that it comes with an 8-speed controller that makes it very convenient to use. The good thing about this duct fact is that it has a very simple installation now that it comes with the required mounting hardware and an installation manual.

Owing to the quality design of this inline duct fan, you will appreciate that it offers an airflow of up to 205 CFM. Even better, it has low noise levels since it will only make 28 dBA noise for convenience. Other than being quiet, you will also be happy to learn that this is an energy-efficient fan. Even with its amazing performance, you will appreciate that this fan comes at an affordable price.

Key Features
  • Designed to ventilate the growing tents
  • Features a speed adjustable design
  • It has a very simple installation
  • Offers up to 205 CFM airflow

#2. VIVOSUN 6-Inch Inline Duct Fan

VIVOSUN 6-Inch Inline Duct Fan

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This is a heavy-hitting blower that has a fan speed of up to 2550 rotations per minute and an airflow rate of 390 CFM. It will therefore move air to your ideal location very efficiently to offer optimal ventilation. With its carbon filter, you will appreciate that it eliminates the unwanted odors, pungent smells as well as particulates that come from grow tents.

Another amazing feature about this inline duct fan is that it comes with a free pre-filter. It is recommended to replace this pre-filter every 6 months or after a complete growth cycle. Owing to its versatile design, it will be ideal for kitchens, greenhouses, grow rooms, bathrooms, and other places. It also comes from a reputable brand that should give you the confidence to buy.

Key Features
  • This fan has a powerful airflow
  • Offers effective odor control
  • Comes with a free pre-filter
  • It has a wide range of uses

#1. AC Infinity Quiet Inline Duct Fan

AC Infinity Quiet Inline Duct Fan

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This is a quitter and smarter inline fan that you will get in the market today. You will appreciate that it works on EC motors and is controlled with precise electronic pulses with smart programming. This will allow the inline fan to work quietly and attain low speed without generating heat or noise. Apart from that, this is an energy-efficient fan that will save up to 40% of its energy costs.

Another feature to appreciate about this fan is that it works on dual ball bearings that allow for an omnidirectional mounting. It also features a mixed flow design allowing it to maintain peak performance in high static pressure environments. With its plug and play design, you can rest assured that installation will be hassle-free.

Key Features
  • Ideal for ventilating the grow tents
  • Comes with an 8-speed controller
  • Quiet and energy-efficient
  • Comes with the required mounting hardware

Buying Guide

  • Construction quality: If you are looking to get an inline fan with the best performance, you can never compromise the material used in its construction. Most of these fans feature quality stainless steel material which is the recommended material. In most cases, the steel inline fans come with a powder coating which helps to extend their life.
  • Size: The size of your inline fan will in most cases be dependent on the size of your growing space. You must therefore choose a fan that will perfectly fit in your space. If you have a large area, you should go for those fans that are large enough to cover the entire growing area effectively. On the other hand, smaller models should be used for small grow spaces.
  • Speed and power: You need to ask yourself whether your inline fan offers speed adjustments. If this is the case, you will be able to customize the speed according to your needs. On a similar note, you need to keep in mind the power of the inline duct fan before making your choice. The power is measured in cubic feet/minute known as CFM. Make sure that the fan power suits your needs.

Conclusion

If you are looking to have an indoor garden, a grow room will be essential. Most importantly, you must manage the temperature and the humidity so well to guarantee that your plants grow properly. When looking for such, the best thing to do is investing in an inline duct fan. It offers the best ventilation for any home application or growing spaces. If you are searching for the best inline duct fans, you can agree with us that this is the place to be. We have summarized the best inline fans in the market and coupled the same with a brief list of features you should consider when buying. What now remains is for you to choose the best inline duct fan and proceed to order.

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