Best Inline Fan for Grow Tent

Grow tents are now popular for indoor growing today. However, I realized that getting the best results with a grow tent depends on using the appropriate accessories. One of such accessories is an inline fan.

So, I researched the best inline fans for grow tents and found some amazing options. In this article, I’ll share them with you, alongside some other information that you might need.

Dive in!

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Product

Features

green thumb

AC Infinity CLOUDLINE T6, Quiet 6” Inline Duct Fan

  • 6″ duct size
  • 402 CFM

max options

AC Infinity CLOUDLINE T12, Quiet 12” Inline Duct Fan

  • 12″ duct size
  • 1604 CFM

best value

AC Infinity CLOUDLINE T4, Quiet 4” Inline Duct Fan

  • 4″ duct size
  • 205 CFM

efficient

MicroMall Quiet 6” Inline Duct Fan with 0-100% Variable Speed Controller

  • 6″ duct size
  • 370-402 CFM

budget option

VIVOSUN 4 Inch 195 CFM Inline Duct Ventilation Fan

  • 4″ duct size
  • 195 CFM

trusted brand

VIVOSUN 6 Inch 390 CFM Inline Duct Fan with Variable Speed Controller

  • 6″ duct size
  • 390 CFM

complete system

iPower GLFANXINL4FILT4MD8CTR 4 Inch 190 CFM Inline Fan

  • 4″ duct size
  • 190 CFM

sold option

TerraBloom ECMF-150, Quiet 6″ Inline Duct Fan

  • 6″ duct size
  • 350 CFM

The Best Inline Fan for Grow Tent

Are you looking to get the best inline fan? Here is a list of our top 8 options that will leave you wowed.

1 | AC Infinity CLOUDLINE T6, Quiet 6″ Inline Duct Fan

Our first pick is this high-quality inline fan from AC Infinity. This option truly stands out when it comes to functionality and performance. It makes it a great pick for those interested in providing adequate ventilation to their grow room.

This inline duct fan comes with a 6″ duct size and a 402 CFM. This ensures that you can enjoy adequate power and high performance with this option.

There is no let down from this fully digital system. It comes with a wide range of functionality that ensures customized and adequate ventilation of your grow room.

It comes with a speed controller that allows you to adjust it to your specific room needs. It also comes with a backup technology that supports your speed settings.

It gets even better with the alarm timer and countdown system that provides tracking to the whole equation. There is no doubt that this option is a great buy across all categories.

PROS

  • It comes with humidity and temperature controller.
  • It supports an alarm system for effective monitoring.
  • It is extremely quiet and easy to use.

CONS

  • It is not exactly the most cost-effective option on the list.
  • Customers have complained that the alarm triggers by itself in some cases.

CHECK CURRENT PRICE: AC Infinity CLOUDLINE T6, Quiet 6″ Inline Duct Fan


2 | AC Infinity CLOUDLINE T12, Quiet 12″ Inline Duct Fan

The next inline duct fan on the list is the Cloudline T12 from AC Infinity. This is another high-quality option that will fit in perfectly into your grow tent.

This inline duct fan comes with a 12″ duct size and a 1604 CFM. In turn, this makes it a perfect pick if you are looking to get an inline fan for a big tent.

This option that qualifies as our max option works effectively with hydroponic rooms providing adequate ventilation.

This option comes with an intelligent humidity and temperature controller that allows you to adjust it to your specific needs. You then enjoy an alarm system, timer, and fan speed control.

There is hardly anything better than this option with a mixed flow design. In turn, it ensures that you can enjoy a quiet experience with this tool.

There is also the benefit of energy efficiency that reduces your expenses. So, if you want to get a cutting-edge inline fan, this option that enjoys smart programming is a great pick.

PROS

  • It is extremely quiet and easy to use.
  • It comes with humidity and temperature controller.
  • It is digitally functional.
  • It is suitable for large grow rooms.

CONS

  • Customers have complained that the outlet and inlet openings do not support 12-inch work.
  • It is quite expensive.

CHECK CURRENT PRICE: AC Infinity CLOUDLINE T12, Quiet 12″ Inline Duct Fan


3 | AC Infinity CLOUDLINE T4, Quiet 4″ Inline Duct Fan

Our next pick is also another great option from AC Infinity. This option stands as the best value option thanks to its exquisite and functional design.

This option fits perfectly into hydroponic rooms and provides adequate ventilation. Its exhaust function is also impressive. This is thanks to its mixed-flow design.

This inline duct fan comes with a 4″ duct size and a 205 CFM. While this is best suited for not so large grow rooms, it delivers effectively when fitted appropriately. This is largely thanks to its industry-leading PWM-controlled EC- or DC- motor.

This also ensures that with this option, you don’t have to worry about noise. It is a design that delivers quiet.

This option is also energy efficient. In turn, you won’t have to worry about spending considerably on power. It then comes with a wide range of items that will ensure you enjoy the ease of use.

This includes duct clamps, AC power plug, mounting hardware, and sensor probe.

PROS

  • It is extremely quiet and easy to use
  • It comes with a humidity and temperature controller, alarm system, timer, and fan speed controller.
  • It supports the efficient use of energy.

CONS

  • It is not the most cost-effective inline fan.
  • It has a low CFM that might not be best for large grow tents.

CHECK CURRENT PRICE: AC Infinity CLOUDLINE T4, Quiet 4″ Inline Duct Fan


4 | MicroMall Quiet 6″ Inline Duct Fan with 0-100% Variable Speed Controller

Our list will be incomplete without this excellent inline fan from MicroMall. This fan is suitable for indoor growing or use in vertical farms.

It offers a wide range of features that also makes it suitable for air filtration use. Even better, this option can simulate winds, intake air, and exhaust smoke and odors from a grow room.

This inline duct fan comes with a 6″ duct size and a 370 to 402 CFM. This ensures that you can apply this option to multiple grow room sizes.

Even more impressive, it supports minor expansion, ensuring you won’t worry about getting a new inline fan in such a case. This option also comes with an EC fan that allows for speed control. You can choose between 0 and 100% depending on your needs.

Also, you don’t need to worry about noise as this option is extremely quiet. So, while you maintain that garden indoors, you don’t need to worry about discomfort from noise. It also brings energy-saving capabilities that ensure you can reduce your expense on electricity.

In fact, you can save around 40% of the expected cost. 

PROS

  • It comes with a 2-year warranty that provides confidence.
  • It supports the efficient use of energy.
  • It is an intelligent tool that enjoys temperature programming.
  • It has excellent customer reviews.

CONS

  • It might not be best for large grow tents.
  • It is not the most cost-effective option out there.

CHECK CURRENT PRICE: MicroMall Quiet 6″ Inline Duct Fan with 0-100% Variable Speed Controller


5 | VIVOSUN 4 Inch 195 CFM Inline Duct Ventilation Fan

The next option that makes this list is this inline duct fan from VIVOSUN. What’s special about this option is its cost. It is the budget option as it comes at a ridiculously low price.

If you’re expecting to get a poor performance due to its low cost, get ready to be blown away. This option is not only cost-effective, but it also delivers effective performance.

This begins with its powerful blower that ensures your grow tent is well ventilated.

It has an impressive value of 2500 RPM as its fan speed. This inline duct fan then comes with a 4″ duct size and a 195 CFM. A combination of these ensures that your plant can enjoy the best possible ventilation.

Its efficient design is something that makes this option a choice pick. It is not only compact, but it’s also lightweight. You can fit it in without taking much space.

To makes things better, this option comes with a flow detector. This ensures that you enjoy increased airflow without the downside of noise.

PROS

  • It supports easy installation thanks to the flanges at both ends.
  • It supports versatile applications – you can use it in your grow rooms, basements, kitchens, and even greenhouses.
  • It is cost-effective
  • It delivers while avoiding noise.

CONS

  • Customers have complained that its duct size is 3.5″ rather than 4.”
  • Customers have complained about the fan blade breaking after short use.

CHECK CURRENT PRICE: VIVOSUN 4 Inch 195 CFM Inline Duct Ventilation Fan


6 | VIVOSUN 6 Inch 390 CFM Inline Duct Fan with Variable Speed Controller

Over the years, VIVOSUN has delivered a wide range of top-notch options when it comes to inline fans. If you’re looking to key into this brand, then look no further than this option. It is a trusted option from a trusted brand that ensures that you can get value for your money without fail.

With this option, you are not just buying from a trusted brand; you get all you deserve thanks to its effective ventilation system. It has an impressive value of 2550 RPM as its fan speed.

This inline duct fan comes with a 6″ duct size and a 390 CFM that complements it. It consistently delivers optimal ventilation by moving air through the target location.

Another thing you enjoy with this option is its plastic fan casing. It is durable and ensures that your investment is worth it.

It comes with a design that ensures you don’t have to worry about loud noises. For a tool to be used indoors, you can bet that this is good news.

PROS

  • It supports a variable speed controller that ensures you can adjust your fan speed.
  • It supports easy installation and maintenance.
  • It is versatile as it supports both horticulture and household application.
  • It is cost-effective and supports the efficient use of energy.

CONS

  • Customers have complained that it makes noise after a while.
  • It might not be the best option for high-temperature areas.

CHECK CURRENT PRICE: VIVOSUN 6 Inch 390 CFM Inline Duct Fan with Variable Speed Controller


7 | iPower GLFANXINL4FILT4MD8CTR 4 Inch 190 CFM Inline Fan

If you’re looking for a complete system for your grow tent ventilation, then this high-quality option is a great pick. It delivers functionality that will impress you across all levels.

One thing that sets this option apart is its quality components. For instance, it comes with a composite center hub and fan blades. This combination ensures that you enjoy less vibration and noise as you use it in your home.

This inline duct fan comes with a 4″ duct size and a 190 CFM. This option delivers power and allows your plants to enjoy adequate ventilation. Even more impressive is its multifunctional status.

With this option, you get an inline fan that eliminates undesirable smell, removes heat, and delivers air. You don’t even have to worry about any significant system rework as it fits into your grow tent easily.

You then get the renowned Australia Charcoal Filter. This 4-inch filter comes from a carbon material regarded as one of the most absorbent in the world.

When you pick this option, you can count on a safe airflow into your growing area.

PROS

  • It comes with uninsulated aluminum ducting.
  • It supports variable speed for personalization.
  • It comes with a pre-filter.

CONS

  • It is not the most cost-effective option out there.
  • Customers have complained about the controls of the fan speed.

CHECK CURRENT PRICE: iPower GLFANXINL4FILT4MD8CTR 4 Inch 190 CFM Inline Fan


8 | TerraBloom ECMF-150, Quiet 6″ Inline Duct Fan

Our last pick of the day is this highly efficient inline fan from TerraBlooom. This option is particularly suitable for indoor gardening as it delivers optimal airflow control for adequate ventilation.

Even more impressive is that you don’t have to worry about noise thanks to its low noise design. It also comes from alloy steel providing an unrivaled level of durability.

This inline duct fan comes with a 6″ duct size and a 350 CFM that will cover your grow tent adequately. It then comes with a cutting-edge EC motor. Even better, you get a dual blade, a jet type that provides energy efficiency. In turn, you can save costs over the long run while still maintaining optimal ventilation in your tent.

You also enjoy flexibility with this option. This is thanks to its adjustment capabilities. You can adjust between 0 and 100% based on your needs. In turn, this level of personalization ensures that you meet your specific airflow needs.

PROS

  • It offers durability thanks to its steel housing that’s coated to resist rust and prevent accidental damage.
  • It comes with a 2-year warranty.
  • It provides energy-saving functionality.

CONS

  • Some customers have complained that it makes noise when at a higher speed.
  • It might come off as pricey.

CHECK CURRENT PRICE: TerraBloom ECMF-150, Quiet 6″ Inline Duct Fan


Inline Fan for Grow Tent Buying Guide

So far, we have listed the best inline fans that you can get for your indoor growing. No doubt that should point you in the right direction.

You will need to understand certain things to ensure that you make the right choice out of these best picks.

Here’s a buying guide that will put things in better perspective for you.

Why Is an Inline Fan Essential?

Buying anything requires you to spend money. As such, it’s normal to be skeptical and concerned that you are spending wisely. That is why you might be wondering if you need an inline fan.

Well, don’t let anybody tell you otherwise. If you plan on using a grow tent for your gardening, then you need an inline fan. Here is why!

An important aspect of using a grow tent is ensuring the availability of proper ventilation. It’s simple, without proper ventilation, you’re on your way to a failed growing experience. In turn, you require adequate planning and foresight to ensure that you provide your plants with a conducive environment for growth.

Well, that is where an inline fan becomes indispensable. It provides a system through which you can get stale air away from your grow tent for fresh air.

Even more, it achieves this through a comprehensive filtration system. For instance, most of these inline fans use carbon odor filters to prevent unwanted smells. The result is that your plants can access adequate ventilation while you record great harvest.

best inline fan buying guide

Factors to Consider When Getting an Inline Fan

Now that you recognize the importance of an inline fan, you must be racing to get one. However, just before you do that, it’s important to recognize that there are certain factors you’ll need to consider. So that you know, these things are important if you want to make the right choice.

So, what are these things?

Intended Use of the Fan

You’ll need to consider what you plan to use it for before getting one. This is because of the dual-use of inline fans. Generally, you can use the fan for – exhaust or intake. When it comes to exhaust, it involves expelling air from the room, while intake involves getting clean air into the room.

Now, the reality is that your set up will play a great role in determining the option you opt for. So, do consider this before opting for an inline fan.

However, you might want to keep in mind that most setups require the exhaust function rather than the intake function. This is because air intake occurs more easily, and a passive intake is usually sufficient for great growth.

So, it would be best if you focused on the exhaust capabilities when getting an inline fan. You don’t even have to worry about losing out as these fans can also deliver for intake. Great, right?

Is a Speed Adjuster Necessary?

Another thing that you need to consider is if a speed adjuster is necessary. This is a tool that allows you to adjust the inline fan’s speed to meet your specific needs.

The reality is they are not always necessary. In fact, where you get a fan with the appropriate CFM range, there’s hardly a need to get a speed adjuster. However, in some cases, they are almost indispensable.

This involves cases where you get a more powerful fan in the hope that you’ll expand your grow tent. In such a case, pending when you expand, you will need to adjust your fan’s speed. So, a speed adjuster becomes necessary.

So, consider your expansion plans, your desired inline fan and determine whether you need a speed controller.

Features to Consider For an Inline Fan

While the factors are more concerned with the fan’s general use, now we will tell you the specific features to consider in your inline fan before getting it. Trust us; this will ensure that you can choose the best option. So, here they are.

CFM of Your Fan

This is perhaps the most important thing to consider when getting yourself an inline fan. The CFM refers to the cubic Feet per Minute that your fan can handle. This is important because it plays a vital role in the overall efficiency of your fan.

Let’s get right into the details.

CFM concerns the air that your fan can exchange out of an area within a minute. Usually, the grow tent is usually measured by cubic feet. So, this measurement involves your fan’s capacity to exchange air within that grow room within a minute.

Usually, this is calculated by getting the cubic feet of space of the grow room. For instance, where the room has a specification of 8’ x 4’ x 12’, that’s a room measuring 384 cubic feet. You might then be thinking that all you need is a fan with a specification of 384 CFM.

best inline fan for grow tent

However, that is not the case. To get the appropriate CFM specification, you’ll need to multiply the cubic feet of space by a minimum value of 1.33. This ensures that you can account for the drop in airflow thanks to filters in the ventilation system.

So, if you are still wondering how to calculate the required CFM, we just told you all you need to know. Multiply the cubic feet value of the room by a minimum value of 1.33. Then, you can go on to get yourself a fan that matches that value.

For instance, in the example above, 384 x 1.33 will equal ~510. In turn, when getting an inline fan, you will need one with a CFM of 510 to get the best result in your grow tent.

However, it would be best to keep in mind that other factors will determine the CFM rating you need for your room. This is because they directly affect the airflow within the room. Now, here are those things.

1. The Grow Lights

The grow light in use plays a significant part in what your ventilation needs will look like. For instance, HID lights produce more heat than other options like CFLs and LEDs. Precisely, your room will tend to be hotter if you’re using HID lights. In turn, you will need more ventilation compared to if you had been using LED light.

So, is your grow room fitted with HID lights? Then, it would be best if you made an allowance to get the right CFM requirement. In turn, boost your calculation by 5% for each light within your grow tent. Also, where your HID light isn’t air-cooled, you will need to boost your calculation by around 10 to 20%.

2. CO2 or Carbon Filters

Another thing that affects your airflow and impacts your CFM calculation is the use of filters. This is because they reduce the intake of air. In turn, you will need to boost the calculation by a minimum of 20% to get the appropriate CFM for your grow tent.

3. Room’s Average Temperature

As you saw under the grow light discussion, the temperature of a room affects a room’s ventilation needs. The higher the temperature, the more ventilation the room will need. So, in cases where you are in an area with an increased average temperature, you will need to boost the CFM calculation.

In turn, boost the calculation by a minimum of 25% where the temperature is higher. However, where there’s a combination of high humidity and high temperature, you will need to boost the calculation by around 40%. This way, your inline fan can function appropriately.

Diameter of Your Inline Fan

Inline duct fans come with a specific diameter. While you might be wondering what’s your concern with this, remember we are talking about air. So, you need to assess the diameter of whatever option you’ll be getting.

First, you must understand that with a wider diameter. The relative humidity of your grow room decreases faster in comparison to the smaller ones. As such, you usually want to go for an option with a smaller diameter.

However, that’s not all you need to do as things get complicated. This is because fans with smaller diameter come with lower CFM. As you have seen above, a low CFM rating won’t do the trick for your grow room in some cases.

So, here’s what you want to do. You want to consider the CFM requirement of your grow tent. We already discussed how to calculate it above. So, get right to it.

Once you do this, get an inline fan that meets your CFM requirement and choose the one with the smallest diameter. This way, you get the best of both worlds.

Length of the Ducting

Another feature that you want to consider is the length of your fan’s ducting. You should know that this feature is an important consideration as it influences the power of the fans.

Precisely, the ducting’s length directly affects the exhaust power of your inline fan. So, you want to go for a long ducting. This way, you enjoy a more effective option.

Also, keep in mind that turns and twist in the ventilation setup also affect your grow room’s required CFM. Precisely, it increases the needed CFM. So, be sure to consider this when getting an inline fan.

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Final Thoughts

Getting the best inline fan is something you must devote attention to if you want to enjoy the best indoor gardening experience. As you have seen, indoor gardening involves a lot of consideration, among which is ventilation.

You will need that inline fan to ensure that you provide adequate ventilation and reap great yields.

To make your task easier, I’ve introduced you to eight of the best inline fans out there. However, I’ll go on further and choose the best option in my opinion.

From the above, I believe the AC Infinity CLOUDLINE T6, Quiet 6″ Inline Duct Fan wins the battle. I bet you are asking why.

Well, it offers functionality thanks to its impressive CFM, which stands at 402. It also comes with a 6″ duct size. In turn, this ensures that it can fit easily into your tent and deliver adequate ventilation.

While it’s not the cheapest on the list, it remains reasonably priced and offers value for money. This is thanks to its digital system that automates a wide range of activities.

There is no doubt that if I were you, I would be going for this option.

Green Thumb Gardener
inline fans for grow tent
Jeremy Starke

We at Green Thumb Gardener provide tips and guides for both for beginners and advanced gardeners out there. 

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