As an indoor grower, are you disturbed with the foul smell that comes out from your grow room? Then you should take odor control seriously as it draws attention to space and also harms one’s health.
Luckily, a lasting and easy solution to clean this unpleasant smell in your indoor grow room is introducing a carbon filter.
This filter reduces the emission of carbon and removes over 90% of the odor from your indoor farm space. So, whether you are using an Aerogarden farm or the grow box to cultivate weed, you need the carbon filter to make the room breathable.
But before you can enjoy this benefit, you will have to get the best carbon filter for grow room. So, read on as we reveal to you the best models on the market and what to consider when buying one.

Contents
TOP 5 Best Carbon Filter For Grow Room
1. CoolGrows 4 inch Air Carbon Filter
If you want a simple but effective way to improve the air quality in a grow room, the Coolgrow carbon filter has got your covered. Apart from sporting a unique design, the filter has several features that can make your indoor space smell fresher.
When you purchase a unit, it comes with a pre-installed filter. Thanks to this component, the carbon filter will soak up any pungent smells from your room. Moreover, it brings in cleaner air to that particular space.
The filter contains an Australian charcoal canister, thereby allowing it to absorb odors effectively. Usually, the charcoal can last for a reasonable amount of time. But you can increase the service life by flipping it to the other end.
The body of this tool can take a good beating without getting damaged. Since it’s built with aluminum, the CoolGrows filter comes as a sturdy item in a grow room. Besides, this metal promises periods of extended use.
You can install this carbon filter without depending on an expert. For this task, the product boasts of plug and play features. When you use this option, you have the perfect chance of setting up the device correctly.
Even if this tool does a good job, it cannot eradicate the lousy air. Besides, after use, you might still sense unwelcome odors at corners of your home.
- It last long
- Its Reversible flange and base helps increase the service life
- Easy to assemble
- It does not reach every part of the space
2. Vivosun 4 Inch Air Carbon Filter
When it comes to effectiveness, think Vivosun air carbon filter. Made from exotic Australian activated charcoal, it offers optimum filtered carbon.
It features a 1050 RC 48 carbon filter that catches three times more air pollutants than the standard carbon element. This feature ensures that all foul odors are trapped within the filter, giving you an odor-free planting space.
Vivosun 4 Inch Air Carbon Filter protect your grow box from chemical irritants. The nutrient solution has a slight concentration of substances, which can irritate the nose. The carbon filter ensures that these smells remain well below the irritation level.
This odor scribbler doesn’t just remove foul smells, but it also absorbs it and renders the source odorless. It is useful in not only indoor gardens but bathrooms, basements, and kitchen also.
You can also install this device in your hood vent to absorb the smoke from your kitchen department. With the Vivosun 4 Inch Air Carbon Filter, you are sure of a wide range of applications. You can also attach one to the ventilation chamber to help clear the room atmosphere.
This device works great in a room with large gathering. It also comes with a reversible filter extension and base for long-lasting use.
One bad thing about the Vivosun air carbon filter is that it quickly increases the room temperature. Apart from that, you have one of the best carbon filters for grow tent on your hands.
- Eradicates sour smell and other impure molecules
- Durable and long service life
- Contains detachable and changeable flanges for use
- Amazing setup
- Reduces the flow of air
- Increases room temperature
3. Hydroplanet 8-inch Carbon Air Filter
The Hydroplanet filter comes with options that make it a perfect choice for beginners. For instance, the package contains an owner’s manual that assists with installation. Since you assembled it by yourself, you won’t spend money on professional help.
The Hydroplanet filter uses 100% virgin activated carbon to handle weird smells. By using this material, it makes the unit safe for indoor use. Besides, the content will not harm any part of your crops.
The 4-inch inline fan draws bad-smelling air through the filter. Within minutes, your grow room will smell better. Furthermore, the charcoal filter absorbs any odors that hang in the air.
If you feel uncomfortable with the speed of airflow, you can adjust the settings. For this reason, the product has variable speed dial. Moreover, this speed control reduces the wear on the blade and makes it last longer.
Do you want a simple way to cool the reflector in the indoor garden? Well, the inline fan also brings down the temperature of this device. That way, it doesn’t get damaged or cause a fire outbreak.
Even if the fan performs excellently, it does not make any noise. That means if you are looking for a quiet carbon filter that won’t disturb your rest times, consider this model.
It has sturdy casing that ensures a long service life for the unit. Such sturdiness will go a long way in coping with the humid conditions of the grow room.
But everything isn’t perfect with the Hydroplanet carbon air filter. If the fan becomes broken, it produces a disturbing rattling sound. Furthermore, the screws that come with the carbon filter do not secure it properly.
- It uses environmentally safe materials
- Ideal for beginners and professional growers
- Speed dial for easy wind control
- Noiseless operations
- Becomes loud when broken
- Unreliable screws
4. iPower 4 Inch Air Carbon Filter
iPower four-inch Air Carbon Filter allows indoor grower to grow their plant worrying about odors with the. It introduces an odor control feature into the surrounding of your grow room with its activated carbon filter fan.
The exciting part is that it contains a set of unique virgin carbon that comes from an ancient qualitative source. This professional-grade filter has what it takes to handle the awful smell that comes from any type of hydroponic systems. It does not only just work as a carbon filter for grow room, but it also delivers breathable air into the grow room.
iPower carbon filter components are made from high quality and durable aluminum source. This component assures you of maximum strength and prolonged-lasting use of the product. The top flange is reversible and you can flip the filter unit upside down.
You don’t need to stress yourself for the installation process because of its simple to carry out. The mounting process is an easy plug and play procedure that saves you the troubles of tedious set up.
Furthermore, with aluminum construction, it weighs less than most carbon filters found on the market. Since it is lightweight, this makes it a perfect device for newbies using the grow boxes.
iPower soak up all the pungent smell from the grow room and keep it clean and very fresh. It also removes harmful air pollutants and disease-causing chemicals from the air.
It comes with a pre-filter chamber that improves the effectiveness of the carbon filter fan. This chamber is essential for an enhanced cleansing of the air in the grow room. Thus, you must change the pre-filter and install a new one after every six months of use.
Like every other products, there is a downside to this iPower four-inch air carbon filter. The carbon chamber is not refillable, and they drop in efficiency as the quantity of carbon reduces. This letdown makes it one-time use filter.
- New and improved product
- Extremely durable and long-lasting
- Simple set up procedure
- The effective odor control feature
- Non-refillable, one time use
5. Phresh Filter 701003 Inline Filter
Phresh Filter 701003 comes with a 46mm, 18-inch RC-48 activated carbon bed. This quality of carbon ensures the best possible air cleansing function.
If you are running a large deep water culture or Aeroponic system, you will need this device to keep you indoor space breathable. It captures all forms of polluted air in the grow room and fills it with clean and healthy air.
The airflow filter feature is top-notch and three times more efficient than the regular carbon filter. The gadget is first-class reliable thanks to the aluminum top and bases, which makes it lightweight.
The lightweight feature easy to know of where to put carbon filter in grow room as it sits conveniently anywhere. Also, it is easy to handle since it is half the weight of other carbon filters.
The carbon is machine-packed, which means more release of carbon to scrub the air. When the filter emits more carbon, it reduces the movement of unpleasant smell in the grow room. The high quantity of carbon released traps the unhealthy odors leaving the air clean.
Phresh Inline Filter takes a cone-shaped internal base that maximizes the flow of healthy air around the grow room. It also has an improved anti-air bypass system to enable effective trapping of unpleasant smells in the indoor space.
It keeps the foul odor locked up in the grow room and scrubs it off with powerful carbon emission. This Phresh Carbon Filter is usable in intake or exhaust situations. You can use it in a variety of setups, which includes using six-inch inline fans, exhaust, and intake fans.
Also, it comes in handy with air exchange fans, ventilation ducts, and range hood vents. The product package arrives in a vast selection of sizes to fit any application.
However, the charcoal spills over the grow room because of a broken interior. This downside is one thing that will make you consider other models.
- Special Anti-Air bypass system
- Properly sealed, bagged and boxed for optimum lifespan
- Comes with a flange and pre-filter
- Vast range of election size
- Leaks soot and charcoal inside the grow room
- Heavily dented on arrival
How Can I Choose the Best Carbon Filter for Grow Room?
Size of the Indoor Grow Room
Before look for the best carbon filter for grow room, consider the size of the space itself. You can start by knowing the amount of air that will suit the area.
Let’s say your grow room measures 10 x 12 feet and has an 8.5 high ceiling. That means you will have a volume of 1020 cubic feet.
If you want to use half of this space, then you will divide the volume into two halves. For growers that want to use a carbon filter kit in tents, they will need to determine the amount of air present in that area.
Pre-Filter
A good pre-filter will help to extend the service life of even the best carbon filter for grow room. This accessory helps remove any contaminants in your indoor garden that uses the drip irrigation system.
Top brands supply their carbon filters with pre-filters. Some place these items in separate cases while others prefer a single canister. However, go for the first option as it’s easier to maintain.
Conditions for Perfect Air Flow
Apart from knowing where to put carbon filter in the grow room, you should put the CFM into consideration.
You can describe the CFM as the cubic feet of air per minute. To calculate this value, multiply the height, length, and width of the grow room.
After getting the answer, use it to purchase an ideal rated intake fan. For example, a CFM makes for a third of the air volume in the grow room or tent.
For the resistance of the filter, increase your calculated volume by 20%. After all, the fan requires extra strength to stand against any opposition.
A CFM calculator offers the ideal CFM value. With this in mind, the size of your grow space plays a significant role in finding the airflow requirements.
If we use a CFM calculator, the room size example we use will be need a carbon filter with a CFM of 49. And that’s if you will be using a single grow light.
Build
As you shop for the best carbon filter for grow room, look for models with premium materials. if you want toughness go for filter made of galvanized steel. Even if it’s more expensive, it works better and is easier to maintain.
The Quantity of Carbon
Filters with more carbon tend to perform better than the ones with less. Besides, such items last longer than regular models. You can choose filters that have 46mm beds as they have an ideal amount of this material.
An Effective Fan
Before getting the best carbon filter for grow room, prepare to get a good fan. Most growers stick with the 10-inch hyper fan. Compared to regular fans, this model has compact features while offering more CFM per watt.
Overall, find a fan that boasts of a higher CFM than the carbon filter. By taking this step, the fan can withstand any resistance that comes from the filter itself.
It will be advisable if you get a model with a 1065 CFM rating. Typically, this carbon filter with such capacity can cover grow rooms of 324 – 1020 cubic feet.
Cost
Most people usually make the mistake of going for the cheapest carbon filter on the market. But the pricey ones stand as the best options for your indoor garden. So avoid cheap carbon filters and choose the top quality ones.
Conclusion
Due to the high level of moisture in grow rooms, they emit foul smells. For this reason, you should always ensure to install one of the best carbon filters for grow room.
Apart from installing the air stones for deep water culture, an active carbon filter makes the grow room feel fresh and comfortable. Our top pick goes to the Hydroplanet 8-inch Carbon Air Filter. The reason is that the fan works silently while the body can resist rust for a long period. It also uses effective virgin activated carbon.