10 Best Inline Fans for Grow Tents 2021 [Complete Review]

Last updated on January 30th, 2020 at 08:13 am

best inline fanCame here looking for the reviews of the Best inline fans for grow tents?

Well, you will not be disappointed then.

We have chosen the very best accessories for you to use in your marijuana indoor grow tents.

These include fans, filters, and even complete packages. Complete packages are combo kits which come with everything you need to grow marijuana discreetly.

Just in case you do not know what inline fans are, they are exhaust fans which are mounted in inside the ducting and are used for air extraction purposes. They cannot be seen as they are inside the pipe or duct.

They help you to cool a hot room or warm up a cool room. They are excellent at circulating airflow.

They also are very energy efficient, you should install an inline fan now if you do not have it already inside your marijuana grow tent.

Talking about grow tents, we have a huge post of the best small grow tents of 2021. We have reviewed the very best grow tents from the market. Make sure you pay a visit to that post to see the best stuff!

Let’s have a quick look at the best inline fans for grow tent.

Top 10 Best inline Fans Complete Review 2021

ModelAir flow (CFM)Weight (LBS)WarrantyDimensions (INCH)Link
iPower 4 inch Inline Fan1906.212 months8.5 X 12 X 11 Check Price
iPower 6 inch Inline Fan44210.612 months11 X 14 X 15.5 Check Price
iPower 8 inch Inline Fan75013.712 months15 X 10.5 X 13.5 Check Price
iPower 4-inch Combo Kit19016.1-14.6 X 14.6 X 19.3 Check Price
iPower 6-inch Combo Kit44228.6-21.5 X 17 X 17 Check Price
AC Infinity T4 (EDITORS CHOICE)15210-13.5 X 10.6 X 9.7 Check Price
AC Infinity T6 (EDITORS CHOICE)3519-14.2 X 12.2 X 11 Check Price
iPower 4 inch booster fan1001.612 months5.4 X 4.4 X 7.9 Check Price
TerraBloom 6 inch 3955.512 months11.5 X 8 x 8 Check Price

Without wasting much time, let us tell you about some of the features that you should keep in mind while buying an inline fan on the internet.

Inline Fans Buyer’s Guide

What to look for while buying Inline Fans – Buyer’s Guide.


You will get different diameter inline fans on the market, but which one would you buy? And why? The most common ones on the market are 4 inch, 6 inch and 8-inch ones. Check what kind of opening you have in your grow tent and choose accordingly.


This is Cubic Feet per Minute values. It means how much amount of air can the fan move in a minute. Check out what kind of volume do you grow tent has, if it’s pretty big then you might want to go toward the higher side of CFM.

iPower 8 inch Inline fan has the highest CFM of 750. Check it out on Amazon.


Everyone hates loud buzzing fans, right?

Make sure you check out the noise level of an inline fan before you buy it.


Give a though to how fast do you want your fan to be. Some inline fans also come with a controller that will allow you to control the speed of the fan, thereby giving you more customization.

Checkout TerraBloom 6 inch inline fan which has a controller to control the fan speed as per your liking.


Make sure that the build material of the inline fan is really strong and durable. Nobody wants a fan that will stop working because of breaking a part or two.


Choose a fan which is easy to install for yours, especially if you are a beginner. See if the manufacturer provides a manual of instruction.


This is one of the most important features. Check how long the warranty is with the manufacturer before buying the product. In case of anything malfunctions, you will be saved if you had a warranty.


Price is also an important factor when purchasing inline fans. If your pockets permit it, then we will recommend you to but the good quality product, these can be a little costly compared to the cheap ones on the market.

Best value for money?

AC Infinity T6 is the very best you can get with money out there.

Check it out on Amazon now!

Inline Fans Reviews 2021

Now let’s start with the review, shall we?

iPower 4, 6 and 8-inch Inline fans for grow tents – Buy this If you just want better airflow

iPower 4, 6 and 8 inch Inline fans for grow tents reviews

iPower 4, 6 and 8-inch Inline fans for grow tents reviews

iPower is a well known reputed company in indoor marijuana growing market. They make lights, tents, and other marijuana growing equipment.

They have been providing growers with Grow lighting systems from more than ten years. You can even get tools and equipment for irrigation, hydroponics, climate control, and structures to support the garden from ipower.

Almost all of their products are loved by their customers and usually, have very high ratings on Amazon.
Regarding best inline fans for grow tents, they have three sizes available: 4 inches, 6 inches and 8 inches.

The main job of these inline fans is to remove all the heated-up air and bring in the new fresh air inside the grow tent.
NOTE – It will not suppress the marijuana odor (for that you need another kind of product, please keep on reading we have included combo kits which eliminate the odor of marijuana).

Visually they are very similar, the only difference they have is their specifications. Checkout the table at the end to see the differences.

The main purpose of a fan is to have proper ventilation inside the grow tent, and these iPower inline fans do their job with the best efficiency.

The inline fans are very quiet when in operation as they are made with high-quality UL listed components. You will get a 5 feet long power cord with these best inline fans for grow tent.

They are good at removing the heat from inside the grow tent and prevent any air delivery problems that you might face. You do not need to change your setup at all; these best inline fans for grow tent will do the job no matter what kind of setup you are using.

You can even use them in your household operations as well as in horticulture and industrial applications. They will make sure that the air remains clean and temperature remains under control at all times.

The outer area of these best inline fans is coated with a ceramic to increase their durability by many folds. The rotating bearings inside the centrifugal design are already lubricated and will require absolutely no maintenance at all.

With the purchase of these fans, you will get a 12-month free warranty in case anything malfunctions.

  • Ceramic coated = more durability
  • 12-month warranty
  • Well known reputed company
  • A high-quality material used
  • UL listed components
  • Minimal noise and vibrations
  • Composite fan blades and center hub
  • Various sizes available
  • Cheap
  • These fans do not eliminate the marijuana odor; they only provide better airflow.


iPower undoubtedly makes some of the very best equipment out there. These best inline fans are without uncertainty very high-quality efficient products. If you are facing issues of heat build up inside your marijuana setup, then you might want to invest in one of these fans to have proper ventilation. They are cheap and very durable. Get one, to give your plants well deserved constant supply of fresh air.

Check 4 inch, 6 inch, 8 inch iPower Inline fans for grow tents on amazon!

iPower 4-inch and 6-inch Inline Fans Combo-Kits – Highly rated setup for eliminating odor

iPower 4-inch and 6-inch Inline Fans Combo-Kits

iPower 4-inch and 6-inch Inline Fans Combo-Kits

Who doesn’t know iPower right?

The name is enough to tell you that the product is of high quality and runs very efficiently.


This is a combo kit for complete odor elimination from iPower.

You want to completely remove the odor or marijuana, right? Well then let us show you how it works…

The odor molecules are present in the air itself, so when the air is forced out by the inline fans it travels and passes through the honeycomb structure.

This honeycomb structure is made out of tiny charcoal filters and a complex network of activated RC 412 Australian carbon. This structure absorbs all the odor and other harmful molecules from the air and traps it inside itself.

The clean air that passes the filters and exits through the inline fans is completely odor and chemical free.
Impressive isn’t it?

Let’s talk about the features now:

All the components used in this system are UL listed for quality, quiet operation and safety. The fans blades and the center hub are made out of composites. As a result, you get very less noise and vibration. The housing is pre-lubricated and does not require any kind of maintenance.

One of the best things about using this system is that you do not need to rework your setups, it can work in any kind of setup you have.

Note: the manufacturer advises that you change the PRE-filter every six months to protect your filter from harm. 1 Pre-filter will be provided to you for FREE with the order.

You will get 2 FREE stainless metal clamps with the purchase. Also, the life expectancy of this setup is of 2 years.
iPower have two difference sizes available: a 4-inch model and a 6-inch model.

Checkout the box below to see the difference in both:

4 inch model includes: 6 inch model includes:
iPower 4″ Aluminum Non-Insulated Ar Ducting (8 feet in length) iPower 6″ Aluminum Non-Insulated Ar Ducting (25 feet in length)
iPower 4″ 190 CFM Inline Duct Fan iPower 6″ 442 CFM Inline Duct Fan
iPower 4″ Aus virgin charcoal filter (12 inch in length) iPower 6″ Aus virgin charcoal filter (16 inch in length)
  • Completely eliminates marijuana odor
  • Zero lubrication and zero maintenance required
  • 2 year lifespan
  • FREE 2 X metal clamps
  • FREE 1 Pre-filter
  • High-quality Australian RC 412 Carbon used
  • Reputed manufacturer
  • Aluminum construction
  • Fire resistant
  • Works in bathrooms, attics, warehouses and grow tents
  • This is designed for usage only in enclosed places. Do not use it in an open space as it will not work as intended.


For those of you who want to mask their marijuana odor, this is a very good product. You can even use It in other places if you like as long as they are enclosed. With just a little bit of fitting, it will make sure that all the air is cleaned out before it exits the grow tent. It’s a must for hidden marijuana growing operation. Check it out on amazon now to see the latest price.

Check 4 inch, 6 inch,  Inline Fans Combo-Kits on amazon.

AC Infinity Cloudline T4 & T6 Inline fans – EDITORS choice for best inline fans for grow tent

These are the most sophisticated inline fans for grow tent that we have seen on the market. They are cheap as well.

These bad boys have gained 4.5 stars out of 5 by 100+ happy customers on amazon.

These best inline fans are designed specially to ventilate marijuana grow tent in the most efficient way possible. They can transfer heating or cooling effects in different rooms.

If you are looking to provide your marijuana plants with fresh air along with completely masking the marijuana odor outside your tent, then this is a must buy.

Let’s talk about the insides first:

These best inline fans for grow tent contain a DV motor with a PWM control to give your efficient and quiet performance at all times.

If you want to clean out the fan then you can easily detach the motor box’s fans impeller and the blades.

With the purchase you get clamps and all the other accessories that you would need for free. You don’t have to have other things to get these inline fans up and running.

What unique about these inline fans?

Well, you get a very intelligent controller with it which features advanced programming and has lots of functions. It has an onboard temperature monitoring system which detects the temperature and automatically adjusts the fans speed. It also has power on-off memory in case you want it to continuously run at all times at different speeds.
Other features include 8-foot water resistant thermal probe, Eco mode, and alarm system.

The rated lifetime of the motor on this inline fan is 67000 hours which is great for this price. The unit is also IP44 rate to be resistant to dust and liquids.

You also get FREE AC power cable, two duct clamps and mounting hardware.

  • Cheap and affordable
  • Free intelligent controller
  • Can be used anywhere you like
  • Inbuilt booster fan
  • High ratings
  • Quiet
  • IP44 rated
  • Energy efficient
  • No mention of warranty


This is our favorite inline fan in the market right now. Mainly because of the intelligent controller that comes with it. You can customize so much from that controller, it makes your life much easier. It is cheap, durable and very efficient. We highly recommend you to buy it and set it up inside your indoor marijuana grow tent today.

Check AC Infinity CLOUDLINE T4 & AC Infinity CLOUDLINE T6 on amazon.

Ipower 4 inch Booster Fan review – Additional booster for increasing air flow

iPower 4 Inch 100 CFM Booster Fan Inline Duct Vent Blower for HVAC Exhaust and Intake 5.5

iPower 4 Inch 100 CFM Booster Fan Inline Duct Vent Blower for HVAC Exhaust and Intake 5.5

You can use this iPower 4 inch booster fan to circulate or exhaust the air from you grow tent.

But we have mentioned it in this post because it can act as an additional booster for your existing HVAC system. If you already have an inline fan system and you need more of the air boosting then this is the right accessory to attach to your setup today.

It is very cheap and will boost your HVAC units airflow.

Sometimes it is clever to add this booster instead of upgrading your whole setup. If you need more airflow, just attach this to the ducting, and you will be ready to go.

Airflow – 100 CFM
Speed – 2930 RPM
Voltage – 110/120V
Wattage – 12 Watt
Noise Level – 40 dB
Diameter – 4 inches
Power cord – 5.5 feet

This portable and lightweight best inline fan for grow tents have superior balanced blades that operate very quietly and have a long service life. The blades are made out of aluminum and are perfect for boosting airflow.

The housing inside the motor has self-lubrication and will not require any kind of maintenance at all. Although keep in mind that this inline fan booster is not enclosed and should not be used in humid environments.
Lastly, you get a 12 month warranty with this fan booster.

  • 12 month warranty
  • High quality materials
  • Long service life
  • Can help boost airflow without changing the existing setup
  • Quiet operation
  • Lightweight
  • Portable
  • Cannot be used in humid environment


If you are facing issues with airflow in your existing inline fans setup then this is the go-to cheap solution. Without changing or modifying the existing system, you can easily boost up the air flow in your grow tent. Check it out on amazon now to see other specifications.

TerraBloom 6 inch inline fan review – Highly rated inline fan on amazon

Inline Fan - 395 CFM Exhaust Duct Fan, Built-In Speed Controller

Inline Fan – 395 CFM Exhaust Duct Fan, Built-In Speed Controller

This Terrabloom inline fan looks very stylish and appealing.

You can use this fan as an intake fan, exhaust fan, light fixture cooling fan or a carbon filter fan. The applications are numerous when it comes to this best inline fan for grow tents. This fan is compatible with all the duct which are 6 inch in size.

One unique thing about this inline fan are that it has a variable fan speed control mechanism. You get a built-in fan speed controller in the power cord. With it, you will be able to control the speed of the fan from 50% to 100%.

This gives you an advantaged when you are saving power, controlling airflow or you want to control the noise level of the fan.

Nice yeah?

The outer shell of this inline fan is made out of strong ABS plastic. It is strong enough o be fitted onto the ceiling of the grow tent. You won’t have any problem hanging it as it weighs only 5.5 pounds.

NOTE – if you want to use this inline fan to eliminate marijuana odor then you will need a carbon filter which is not provided with this purchase. You should find a carbon filter which has 6 inch neck easily on the market.

With 70-watt power capacity, this inline fan will give you 395 CPM of airflow for your grow tent. That is quite a lot for a medium sized grow tent. The current on this inline fan is 0.58 amps and the fan speed is 2400RPM. The built-in motor and the controller are ETL listed for safety.

You will get a 1 year manufacturer’s warranty in case there are any manufacturing defects in this best inline fan for grow tent.

  • High amazon ratings
  • 1 year warranty
  • Variable fan speed control
  • You can hang it or wall mount it
  • Works with any 6 inch duct fittings
  • ETL listed parts
  • High airflow supported
  • Very lightweight
  • Affordable
  • Additional carbon filter needed in order to eliminate the marijuana odor.
  • Does not work in very hot temperature.


This is a very stylish looking inline fan. It adds to the overall look of a grow tent. Buy it if you want a fan which has a very high airflow rate and is affordable. If is full compatible with any system which has a 6 inch duct size, you can use it wherever you like. With 1 year warranty there nothing to be afraid of, we are sure you will love it as much as we do.

Also check:


We hope you got what you came here to look for!

We undeniably recommend the AC infinity inline fans to anyone who wants a complete package for their grow tents. Those fans will make sure that your heat build is thrown out of exhaust while completely masking the marijuana odors using the very best carbon filters.

And don’t forget the intelligent controller that you get with this unit, they help you customize so many things together to make the marijuana growing experience better.

Go now on the amazon website and checkout the latest price!

Happy shopping!

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