Best Carbon Filter for Grow Room In 2021

by Mark Joseph

Monitoring the progress of a plant in the grow room should comfortable, and this will cause a rise in yield. Besides, an augmentation of the harvest, you will undoubtedly have to face some consequences like an intoxicating bad smell. However, dealing with the intense odor that spreads from the grow room is a problem. In these circumstances, the best carbon filter for grow room may be a solution.

But the prolonged odor in the grow room can be a major concern for many growers, other people in the home, and can cause some health problems. Without taking care, the smell may stay and remains both inside and outside the grow room.

Besides the natural odor of the crop, other additives like fertilizers, pesticides, and nutrients intensify the smell. While all the additions and their own distinctive odors mix, the consequence is an intoxicating smell. One of the simplest but effective solutions to reduce carbon emissions is a carbon filter. Carbon filters come fitted with virgin charcoal, which is carbon that absorbs the smell.

Top 6 Best Carbon Filter For Grow Room

You will not get too many options in the market for cannabis odor control in the Grow Room. There is only one option available for this purpose; the choice is to use superior quality carbon filters.  A carbon filter absorbs the bad smell in the room and prevents it from escaping the grow room. The following are our selections of best carbon filters for growing cannabis and other indoor plants.

#1 iPower 4 Inch Air Carbon Filter Indoor Plants Grow Tent

ipower 4-inch air carbon filter

There is no wonder that top pick in our review of the best carbon filters to use in a grow room is iPower 4 Inch Air Carbon Filter. It is 4 inches in diameter and 12 inches long. Firstly, the iPower 4-inch Air Carbon Filter uses RC Australian Virgin activated carbon, which is considered one of the best qualities in the current world.

This carbon is thick that allow the highest absorption, and besides, it aids remove toxic chemicals, too much heat, and bad smell. This filter has a 53% free zone that makes the most of the airflow, making it extra operational in odor management.

For maximum strength, the company made it of superior aluminum. You can easily reverse the charcoal canister, to use the unused part of the filter by modifying the filter, the iPower 4 Inch Air Carbon Filter is reversible.

This specific carbon filter does not permit mold, germs, and other pollutants to build up in the air. It is inexpensive, and the manufacturer offers it with two years warranty. iPower 4 Inch, Air Carbon Filter, is multipurpose, and you can also use it in bathrooms, kitchens, and greenhouses.

This model comes with 4-inch flange ducting and is 12 inches in length. The airflow, on the other hand, is 200 CFM. As part of the extra-fitting of iPower 4-inch, the producer offers the Air Carbon Filter with two extra poly-cotton made pre-filters. Pre-filters help absorb significant pollutants before reaching the carbon filter.

  • Versatile with superior performance.
  • The CFM inline tube make sure that it runs fast.
  • Use the most absorbent carbons in the world.
  • A reversible flange, you can expect it to be long-lasting.
  • Comes with two years warranty.
  • Superior carbon filter.
  • The pre-filter has to be substituted every six months.

The combo is useful not only in a grow room, but also in a greenhouse, the bathroom, and your kitchen.

#2 VIVOSUN Air Filtration Kit

vivosun 4 inch carbon filter

If you are looking for the best way to rid your grow room of bad smells, then you should look for the perfect product to do. VIVOSUN products are made with great quality materials, and they are some of the most efficient and one of the best in the market. Every part is made simple and build with advanced materials.

You don’t need to waste time purchasing and returning parts that may or may not be compatible or safe to use together. The set comprises of a three-part system; you need to set up every part.

This set contains sturdy ducting and 2 Stainless Clamps. Durable and flexible steel wire supports heavy-duty triple-layer duct walls. PET core is inserted in layers of fire-hindering aluminum that can handle temperatures from -22 to 266 Fahrenheit.

If you are searching for the best carbon filter combo, the VIVOSUN Air Filtration Kit is best for you because it is the best carbon filter kit for the grow room. The VIVOSUN Company made this carbon filter combo using high-quality Activated Carbon that will deliver 100 percent filtered airflow.

What’s more, it has a powerful inline fan with a speed of 2500 rpm and low noise levels. Also, the fan uses the power of 68W Current and has ETL recognized components.  With its interior and exterior mesh construction, this provides a 53 percent open area that allows free airflow.

This Air Filtration Kit is perfect to use in hospital rooms, commercial cooling, green rooms, and industrial applications. To sum up, the Ducting and Clamps are made from high-quality aluminum that is durable, corrosion-proof, temperature resistant, and environment-friendly.

  • Powerful inline fan.
  • Interior and exterior netting provides open airflow.
  • Low noise level.
  • Safe temp operation.
  • Suitable for green rooms / grow tent.
  • Fast and easy to set up.
  • No warranty.

Besides using for your grow room, this Air Filtration Kit is perfect for use on hospital rooms, commercial cooling, green rooms, and industrial applications.

#3 Phresh 701005 Carbon Air Filter

best carbon filter kit for grow room

Do you know, what size carbon filter for 4×4 tent? Here is Phresh carbon filter. It is more expensive than other carbon filters in the market, but it values every penny. This product’s features and performance are incomparable, and you will forget about the price very fast if you start using it in your grow room.

The 18 inch RC-48 activated charcoal filter with Australian virgin carbon is the most important source for its efficiency. The carbon in the filter has the least movements because it is packed exceptionally tightly. Great features include an air-bypass system that makes sure optimum air circulation throughout the grow room.

You can remove the foul odor inside and outside the grow room by using this process. Besides absorbing bad odors, Phresh filter also adds beauty to your grow room. However, the excellent cone-shaped base looks eye-catching, which enhances the grow rooms ventilation it delivers the crops. This filter is maybe the solution to what is the best carbon filter for cannabis? This product is perfect for indoor cannabis farming, tomatoes, vegetables, lentils, pepper, and many others.

This filter has 6 Inch diameter and 16 inches in length, and given its features, it would have been unfair to contempt this brand a chance to be on this list. You can install the Phresh easily even if you are alone because it is much lighter than the other activated carbon filters available right now.

Phresh Filter 701005 carbon air Filter uses a 46mm thick certified virgin carbon bed. If you want fresh air not only in the grow room but also in the surrounding area, you should use this brand.

  • Have an anti-air bypass system
  • It’s durable carbon filter.
  • The cone shape of the filter optimizes the ventilation
  • Larger surface area making the carbon more absorbent
  • It comes with a pre-filter.
  • 1 yr. warranty from the manufacturer
  • Quit expensive.
  • The base and flange cannot be reversed.

So, it would be the best carbon filter for any grow room. The cone shape of the filter is impressive, making it possible to optimize the ventilation that it provides to your plants.

#4 VIVOSUN 4 Inch Air Carbon Filter Odor Control


The VIVOSUN is such a reputable company when it comes to making high-quality carbon filters, and Vivosun 4 Inch Air Carbon Filter is no exemption. The carbon filter has a diameter of 4 inches and a length of 14 inches. This filter claims nearly 100% of the air that passes through and makes it one of the best carbon filter for grow tent.

The Vivosun 4 Inch Air Carbon Filter has numerous applications with its main job being in a grow room to eliminate bad odor, a chemical in the air, and impurities. It can also be used as an exhaust or intake filter thanks to the best inline fans to help improve the circulation of air in the grow room.

This quality product eliminates odor from the grow room and protects the crops from chemical irritants. The same product also works well to absorb lousy odor in pet houses, kitchens, bathrooms, and basements, among other places.

The company made this filter from imported Australian Virgin Activated charcoal considered the best absorbent carbon in the world. The base and flange are reversible, meaning that you can turn the carbon upside down to make use of the unused part of the filter.

The Vivosun Air Carbon Filter has a pre-filter as an additional accessory. The work of the pre-filter is to ensure that only clean air reaches the main filter. They made it of galvanized steel means that it is durable and with serving you for years without a necessity to replace it!

  • Great performance and reliable.
  • Multipurpose, providing better value for money.
  • Made with extreme quality materials.
  • Ability to deliver 100% uninterrupted airflow.
  • It comes with reasonable price.
  • 1-year standard warranty.
  • Rather noisy.
  • Pre-filters have a short lifespan.

So, it provides 100% of filtered airflow, which is pretty much hard to beat. This filter is versatile, providing better value for money.

#5 iPower GLFANXEXPSET6D16CHUMD 6 Inch 350 CFM Inline Carbon

best carbon air filter for grow room

iPower is such a reputable company when it comes to making high-quality carbon filters. The carbon filter has a diameter of 6 inches and a length of 16 inches. This brand is one of a few brands that claim to filter nearly 100% of the air that passes through it.

This quality product eliminates bad odor from the grow room and protects the crops from chemical irritants. The same product also works well to absorb ruthless odor in pet houses, kitchens, bathrooms, and basements, among other places. Besides that, it has a temperature endurance range from -18 degrees C to 85 degrees C.

The filter is 6 Inch 1050+ IAV Australia Charcoal Filter. iPower made it from imported Australian Virgin Activated charcoal considered the best absorbent carbon in the world. The base and flange are reversible, meaning that you can turn the carbon upside down to make use of the unused part of the filter.

This Air Carbon Filter included a pre-filter as an additional accessory. The work of the pre-filter is to ensure that only clean air reaches the main filter. Also, iPower 6″ 350 CFM inline fan carbon filter comes with 16 feet uninsulated aluminum ducting with a fan speed controller.

Flame-retardant coating and corrosion-resistant wire helix for safety. It also features temperature and humidity monitor for grow room ventilation. Ideally, this product features a fan speed controller with a variable speed that allows you can select either low, medium, high, or off. To avoid the risk of burning out the fan motor, the controller does not adjust below 50%.

This filter has 6 Inch 350 CFM Duct Inline Fan Blower with Composite fan blades and center hub, which reduces noise and vibration. This ventilation combo removes heat and eliminates the undesirable ill-smelling odors in the grow tent to solves air delivery problems without major system rework or expense.

  • Well-made and durable.
  • Free pre-filter included.
  • Reduces noise and vibration.
  • Fan speed controller.
  • Removes heat and eliminate ill-smelling odors.
  • Corrosion-resistant wire helix.
  • Not suitable for big grow rooms or grow tents.

In short, it is likewise durable, lightweight, and adjustable. This iPower filter is right for use at any professional level grow rooms while ensuring optimal air circulation.

#6 G-HYDRO 4 Inch Air Carbon Filter


You need to combine this carbon filter with a pipe and appropriate sizes fan. It can effectively remove the odor of the enclosed indoor space or the inside of the grow tent. It removes not only odors but also filters and absorbs harmful substances and pollutants.

G-HYDRO 4 Inch Air Carbon Filter 210 CFM. It has a diameter of 4 inches and 14 inches in length and specially designed black style. The panel ventilation rate of up to 53%, significantly reducing air volume loss and increasing work efficiency. The free high-quality material pre-filter blocks 99% of the particles, effectively preventing the filter from being clogged.

The company made this filter with 1050+ RC48 Virgin Australian activated charcoal, one of the world’s most absorbent carbons available, offering 100% filtered airflow. According to scientific calculations, the optimal shape of each carbon particle is designed.

The tapered base works by the principles of mechanical design and can better apply the absorption effect of activated carbon, reversible filter flange, and base for longer life. Long screw port design makes it easier. For optimal performance, you should reverse it once in half a year to improve the use.

The unique design makes it has higher absorption performance for air pollutants, including the smell of indoor planting tents, kitchen fumes, pet odors, cigarettes, and other chemical irritants.

The item can be used as an air intake or exhaust filter for various settings, suitable for indoor planting tents, bathrooms, basements, and kitchens. It is a must-have air quality butler for your home. Need to be used with straight exhaust fans and ducts.

  • Great design for absorption performance
  • Good materials make it more durable.
  • It is a reversible carbon filter.
  • Multipurpose, providing better value for money
  • High-quality material pre-filter.
  • A little noisy.
  • It’s not suitable for big grow rooms.

If you want to enjoy the fun of indoor planting, it will be a necessity for your home. The specially designed black style adds elegance to your home.

Factors to Think for Buying a Carbon Filter

There are lots of carbon filter options available in the market, and thus, you must choose the right one for effective results. Here are a few essential things to consider to ensure that you make the right decision:

Read More: how to buy a oscillating sprinkler for lawn.


The main component used in making carbon filters is vital not only for durability but also for performance. Superior materials made carbon filters can be more expensive, but they are sure to be value your money.

One of the most important factors to consider when choosing your product is the elements of the carbon filter. The majority of the filters available in the market have heavy-duty superior galvanized steel, which makes sure their durability and performance. Top-quality material will cost you much more than other materials but do not compromise quality by selecting to buy less costly carbon filters. It is also easier to maintain good quality premium material than other components.


Versatility is another factor you should consider. Choose the multi-functional carbon filter, if you want the best value for the money. It allows you to benefit from picking a product that acts not only as a carbon filter but also as an inline or exhaust fan.

However, A versatile carbon filter means that you can use it not only in a grow room but also in other places.


Most of the quality carbon filters are readily packaged with pre-filters that you can use outside of the carbon filters. Nevertheless, the pre-filters play a significant role in removing dust and other particles in the grow room. With the pre-filter, the carbon filter and the inline fan stays clean and performs more efficiently. Still, by using a pre-filter, you can also increase the life span of a carbon filter.

Generally, the manufacturers fix a pre-filter to extend the lifespan of the carbon filter. A pre-filter helps remove the sediments and impurities from the grow room. The best carbon filters have installed pre-filters.

However, some impurities may go through the carbon filter, but with a pre-filter, the carbon filters easily trap the sediments.


The thicker the filter’s carbon, the better the absorption capacity. Filters with more carbon thickness control the odor better than that with the lower thickness. These filters are handy and will cost you more; however, worth every cent.


Generally, the best carbon filter for a grow room is durable. Still, it is almost impossible to judge whether a given carbon filter will be sustainable by just looking at it.

Aluminum is highly preferred in making carbon filters because it is lightweight and affordable. But the lone problem with this is that aluminum is very much eroding. However, the top aluminum carbon filters are coated with a noncorrosive material. Instead, you can use steel. Steal is a heavy metal, and steel carbon filters do not corrode easily, making them long-lasting. You can still use other materials as long as they do not erode or leak odors.

How to Take Care of your Carbon Filter?

Here are some of the most important things that you have to keep in mind to keep the carbon filter in its best condition, and to make it durable:

Carbon air filters need minimal maintenance to work effectively, and they are easy to maintain. You should change the filter as soon as it becomes saturated.

Many air filters often include directions on how to remove filters – which can be incredibly helpful if you should not base them on changing odor of the filter.

However, you should provide proper airflow for the air filter to work correctly, even if you maintain correctly.

To clean the filter correctly,

  • Firstly, you have to remove it from the grow room.
  • Take it to an open space where you can clean it easily.
  • Shake it vigorously to remove any trapped dirt or dust. Spray water.
  • Submerge it in water with mild soap for about 15 minutes.
  • Rinse and allow it to dry completely before putting back in the grow tent.
  • You have to dry the activated carbon under the heat of the sun to make it last longer.
  • Before using the filter, it is also necessary to have it vacuumed first.
  • Remove the excess carbon prior to its use.

Using air filter beyond its lifespan will compromise its performance.

Frequently Asked Questions

Do carbon filters work for grow rooms?

Answer: Yes, carbon filters for grow rooms’ remover odor from the environment. The activated charcoal inside the filter attracts and traps organic particles that might cause bad smell in your to grow room. Inline filters or reversible carbon air filters can absorb and exhaust odor.

What size carbon filter do I need for my grow room?

Answer: It is vital to pick the right carbon filter size. To do that, you will need to calculate the volume of the grow tent or grow room. You can do this by multiplying the length by the width and the height.

Your fan CFM to be 20% more than the square feet of your room. In smaller tents, you will most likely only need a single 4-inch fan to move enough air.

Where to put carbon filter in grow room?

Answer: According to your requirements, you could hang filter inside the tent or place it inside or outside the grow room.

The Bottom Line

Although the carbon filters mentioned above do not produce a complete list of all the quality carbon filters, they are great value-priced products. Carbon filters are more of a necessity than an option for people practicing indoor gardening.

After researching, we think iPower 4 Inch Air Carbon Filter Indoor Plants Grow Tent, will be the best carbon filter for grow room. Because you will get superior performances, it is versatile and also a relatively reasonable price. With the reversible flange, you can expect it to be long-lasting, and the manufacturer offers it with two years warranty.

Exclusively for cannabis growers, you can forget about the smells of the house because the crop can definitely smell. We hope that it is now easier to make the right selection after reading this best carbon filter for the grow room.

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