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Best Carbon Filter

Last Updated: April 30, 2020
Roy Stevens
Product Review by Roy Stevens

Today we’re talking about some of the best carbon filter available.

If you’ve clicked on this article you’ve probably been asking yourself the same question, should I incorporate a carbon filter for grow tents or my grow room? And if so, what are the best carbon air filters?

Or you may even be wondering, does my grow tent even need a carbon air filter?

Well, the chances are you want to keep your grow room discreet, as well as odorless, which in turn will not only keep YOU happy, but most importantly your NEIGHBOURS happy, and hopefully unaware.

Maybe you need a 4 inch air carbon filter? Or how about a 6-inch carbon filter for grow rooms? Aluminum or steel frame?

As you probably already know, these features all play a big role in the performance of your carbon filter regardless of if you use it in a grow tent or grow room.

So If you’re looking to learn a bit more about carbon air filters or maybe searching for the best carbon filter for grow tents and grow rooms, then keep on reading.

Our Reviews

AC Infinity Air Carbon Filter 6"

Here we have affordable, yet premium carbon filter for grow rooms & tents by AC Infinity. Designed to eliminate odors and chemicals for grow tent setups and larger grow rooms.

The AC Infinity carbon filter features premium-grade Australian charcoal with a higher absorption and longer life rating.

Build quality wise the AC Infinity contains heavy-duty stainless steel flanges, aluminum meshing, and clothed pre-filter.

This really is an excellent carbon filter from AC Infinity and offers indoor cannabis cultivators an alternative to what’s already out there.

The 6-inch model enables maximum airflow passthrough for both intake and exhaust configurations and has a duct Opening of 6”, is 16″ in length with a thickness of 60mm as well as featuring Australian RC412 at 1200+ IAV.


  • Quality build
  • Australian RC412 at 1200+ IAV
  • Premium-grade charcoal
  • 6 inch air carbon filter
  • Competitively priced
  • Well-known brand
  • Highly rated


  • Short product life with some models
  • AC Infinity do not presently sell replacement pre-filters

Terrabloom Activated Charcoal Carbon Filter

First on our list is an impressive 6 inch carbon filter that, made by the company Terrabloom.

Whether a beginner or experienced grower, at some point along the way you’ll eventually hear the name Terrabloom.

They’re a well known trusted brand, and to be honest you can’t really go wrong when choosing a carbon filter made by Terrabloom.

In the 6″ premium carbon filter model you’ve got exceptional build quality and excellent materials used throughout. With the added bonus of a 90-day warranty if anything goes wrong or is not up to standard.

Terrabloom only uses top grade RC-48 charcoal carbon throughout all their carbon filters, which is usually sourced from Western Australia.

The bed in this particular Terrabloom filter is an impressive 46mm thick, added to this it’s been machine packed with extremely small granules.

That adds a massive 15% more carbon than what is normally seen in most carbon beds of economy grade filters currently on the market today.

As well as the above, this filter is rated up to 550 CFM, 1.8″ (46mm) RC-4/8 virgin carbon bed. Which is effective for up to 24 months of continuous use.

This particular Terrabloom filter has a 6″ duct opening and is 24″ length, it also includes 2 machine-washable pre-filters in black & white. All in all, it’s a top-quality 6″ carbon filter.


  • Quality brand & build
  • Top rated
  • 90-day warranty with the big online retailers
  • Carbon filter odor control when combined with a grow tent inline fan
  • Only top grade carbon used
  • Good price


  • Connecting the filter can be troublesome

Phresh 6 Inch Carbon Filter

The 46 mm RC-48 activated, certified virgin carbon bed will soak up and eliminate some of the most undesirable odors and potentially harmful chemicals in the air.

The Aluminum frame allows for reduced weight but also reduced durability. Machine packing the carbon bed means a higher volume of carbon and less movement.

We like the claim by the manufacturer that the filter comes sealed, bagged, boxed and labeled directly after being manufactured for optimum life span, handling, and presentation.


  • Certified virgin carbon bed inside
  • Top rated
  • Well known brand
  • Sealed & boxed directly after being manufactured
  • Custom mesh 51% open air


  • Some units not as advertized
  • Short lifespan
  • Damaged items upon opening
  • Odors still noticeable

Growneer 6 Inch Carbon Filter

This 4-inch air carbon filter is worth its weight in gold. Don’t sleep on this extremely affordable Growneer 4” carbon filter.

It has a 1050+ IAV virgin Australian raw carbon, which delivers maximum filtration effectiveness.

The reversible flange and base will also prolong its service life.

The increased lifespan and high-quality Australia virgin charcoal make this filter perfect for any grow room.

Keep your room clean while bringing in cleaner air flow to promote better plant health.


  • 1050+ IAV Australian carbon charcoal filter
  • Reversible flange & base
  • Unbelievably good price
  • Extended product life due to the materials used
  • Cone shaped base that utilizes the full use of the carbon
  • Highly rated
  • Well known brand


  • Reported short lifespan with some units
  • Air flow not great
  • Some smells still detected

VIVOSUN 6 Inch Air Carbon Filter

Similar to other models, the Vivosun 4″ Carbon filter also comes with a pre-filter unit. This pre-filter unit will make sure that the air passing through the filter gets thoroughly cleaned.

The carbon charcoal used in this filter is commonly used in most filters. A unique attribute of this device is that the company Vivosun claims that its device will filter 100% of air flow at over 200 cfm.

Having a reversible flange means that there are two ways you can use this carbon filter. We also like this 4 inch carbon filter because it provides great value for the cost and a long two-year lifespan.

Keep in mind, this Vivosun carbon filter requires regular cleaning. Stay up to date with the maintenance to keep your filter in top shape.


  • Australian 1050+ RC 48 activated charcoal
  • Another well known top brand
  • Good price which includes some extras
  • Reversible flange for extended product life
  • Highly rated


  • Gets clogged in a short time frame
  • Cheap pre-filter
  • Smells can sometimes be noticeable

CoolGrows 6 inch Air Carbon Filter

These 6 inch air carbon filters are easy to install and will remove most odors and nasties from the air. It will give you a clean air environment for your crop to be at it’s healthiest, which will allow your plants to thrive.

We love filters with the Galvanized steel frame, this makes them much more durable and longer-lasting. You definitely won’t regret this purchase.

This filter is machine packed and enables 99.8% air flow. We would say the best thing about this filter is its long lifespan. Being made from galvanized steel ensures it will last through germination, flowering, and harvesting.


  • Good price
  • Well known brand
  • 1050+ IAV Australian charcoal
  • Inner & outer mesh offering 53% better airflow
  • Premium zinc-anodized steel free from planting chemical corrosion


  • Non-reversible
  • Air carbon filter odor control isn't the best
  • Short lifespan

IPOWER 4 Inch Air Carbon Filter

Built with an outstanding 50mm thick layer of carbon filter makes this the thickest of all the carbon filters out there in the market. This 4 inch air carbon filter is perfect for eliminating the odor coming from your precious plants.

Those dank buds won’t know what to do with all the fresh air. This Ipower carbon filter is also known to have a 53% open area.

This is important because it increases the airflow rate and delivers faster odor elimination. We know that you will really enjoy the extra thick premium carbon filter on this model.


  • Top rated
  • Well known brand
  • 1050+ IAV Australian RC412 activated carbon
  • Inner & outer mesh
  • Weighs 50% less with its aluminum construction
  • Good price


  • Carbon filter odor control not the best
  • Short lifespan
  • Odd smell when in operation

What is Carbon Filtering?

Carbon filtering is a method of filtering which is used to remove contaminants and impurities from the air, using a chemical adsorption process.

A bed of carbon is used within the carbon filter to achieve the required results.

A single particle or granule of carbon provides a big enough surface area or pore structure to expose the contaminants to the active sites.

Just one gram of activated carbon is thought to have a surface area in excess of 3,000 m2 (32,000 sq ft).

Air carbon filter odor control is known to work via a process called adsorption, whereby contaminants and pollutants in the air are captured and treated inside the pore structure of the carbon substrate.

Activated charcoal carbon filters are extremely effective at removing particles, odors and such from the air, so are ideal for most indoor grow rooms or grow tents.


There you have it, a comprehensive guide to some of the best carbon filter for grow rooms on the market today.

Hopefully, this article will help you choose the best carbon filter for grow tents or grow rooms.

But if you’re still unsure, why not click back to our homepage, click on the product tiles and take a look through our hand-picked selection of some of the best carbon filters available.

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