Maximizing Your Small Grow Room’s Potential with Top Air Purifiers

Home » Buying Guides » Maximizing Your Small Grow Room’s Potential with Top Air Purifiers

TL;DR: In 2024, find the best air purifier for small grow rooms. Look for units with activated carbon filtration and high CADR ratings for optimal odor and VOC removal.

Make sure your grow room maintains high air quality. Consider factors like filter type, noise level, and energy efficiency.

Invest in a purifier that suits your room size and specific needs. This will help you achieve healthier plants and higher yields.

Looking for the best air purifier for a small grow room?

Proper air purification is vital for ensuring your plants remain healthy, especially in compact spaces prone to mold, humidity, and odors.

This guide highlights top-performing air purifiers, tailored for small grow rooms, that efficiently tackle pollutants and keep energy costs low.

Dive in to discover the ideal fit for your needs.

In this guide, I underscore the importance of air purification. This is especially vital for maintaining plant health in small grow rooms. These compact spaces frequently encounter challenges, notably mold, humidity, and unwanted odors.
Among my top recommendations, the Coway Airmega 250 stands out distinctly. It is recognized for its energy efficiency and superior filtration, making it an optimal choice for small grow room environments.

Note: This post does contain affiliate links. If you purchase a product after clicking one of our links, we may earn a commission. As an Amazon Associate, we earn from qualifying purchases. There is no extra cost to you and I thank you in advance for your support!

Top 7 Best Air Purifiers for Small Grow Rooms

I’ve researched and compiled a list of the best air purifiers for small grow rooms to help you improve the air quality and promote healthy plant growth. Check out my top picks below:

Prices pulled from the Amazon Product Advertising API on:

1. Coway Airmega 250 – Grow Room Air Purifier With Smart Mode

The Coway Airmega 250 is an excellent choice for small grow rooms. It effectively purifies the air while being energy-efficient.


  • Exceptional coverage up to 930 sq. ft.
  • HyperCaptive Filtration System for 99.999% particle reduction
  • Smart Mode for adaptive and energy-efficient operation


  • Might be noisy on high settings
  • Requires filter replacement and prefilter cleaning
  • No remote control included

Using the Coway Airmega 250 in my grow room significantly improved air quality. Its HyperCaptive Filtration System includes a pre-filter, deodorization filter, and True HEPA filter. These effectively reduce allergens and odors.

I was most impressed by the air purifier’s Smart Mode. It adjusts fan speeds based on air quality, ensuring energy efficiency and effectiveness. Additionally, its built-in air quality indicator is great for monitoring pollution levels.

Besides Smart Mode, the purifier has 3 manual fan speeds. However, the highest speed is a bit noisy and might disturb quiet spaces. Also, regular maintenance, including filter replacements and prefilter cleaning, is necessary.

  • Save

2. Allerair AirMedic Pro 6 Ultra Vocarb – Best for Large and Small Grow Room Air Purifier

The Allerair AirMedic Pro 6 Ultra Vocarb is an ideal air purifier for anyone seeking to maintain clean and healthy air in a small grow room.


  • Powerful 560 CFM airflow for up to 2000 square feet area
  • Quiet operation suitable for various settings
  • Long-lasting filters with up to 24 months of use


  • Bulky design and 50-pound weight
  • Potential difficulty in finding filter replacements
  • May not address all airborne issues

The Allerair AirMedic Pro 6 Ultra Vocarb improved air quality significantly in my grow room with its effective 560 CFM airflow. It’s versatile, covering up to 2000 square feet. It operates quietly, ideal for shared spaces. Its long-lasting filters, replaced every 24 months, are cost-effective and convenient. The AirMedic Pro 6 Ultra Vocarb has some drawbacks: it’s bulky, weighs 50 pounds, and finding filters can be challenging. It might not remove all pollutants in small grow rooms.

The Allerair AirMedic Pro 6 Ultra Vocarb is a powerful and quiet air purifier that works well for small grow rooms, but its size, weight, and potential difficulty in finding filter replacements may not be ideal for all users.

3. Airpura T600 – A Fantastic Choice for Small Grow Rooms

The Airpura T600 is a fantastic choice for small grow rooms. It effectively eliminates tobacco smoke and chemicals.


  • Impressive 26-lb carbon filter for maximum smoke absorption
  • Unique Tar Barrier pre-filter to remove tars from the air
  • Effective 360° air distribution covering up to 2000 sq.ft


  • Noise level tends to be higher on max power
  • Heavy unit at 50 pounds
  • Could be pricey for some budgets

I used the Airpura T600 in a small grow room. I was impressed by its 26-lb carbon filter. It effectively removed tobacco smoke toxins, noticeably improving the air quality.

The Airpura T600’s Tar Barrier pre-filter effectively trapped and removed tars, enhancing the air quality for plants.

The Airpura T600 has 360° air distribution. It covers up to 2000 sq.ft and has two air exchanges every hour. It ensured consistent air purification for my small grow room.

The Airpura T600 can be loud at max power but is quieter on lower settings. The Airpura T600 weighs 50 pounds and is hard to move.

4. Coway Airmega Aim 2-in-1 Powerful Filtration and Compact Grow Room Air Purifier

Coway Airmega Aim is a great choice for purifying the air in small grow rooms. This is thanks to its powerful filtration and compact design.


  • Effective 3-in-1 filtration system
  • 360° air intake for thorough purification
  • Convenient auto mode for energy efficiency


  • Remote control only works up to 11 feet away
  • Can be noisy on higher settings
  • Filters may need frequent replacement

After setting up the Coway Airmega Aim air purifier, I quickly noticed a boost in air quality. Its 3-in-1 filtration trapped almost all nano-sized particles, creating a purer space for my plants.

I valued the Airmega Aim’s 360° air intake. This ensures comprehensive purification. The combined air purifier and fan feature was especially beneficial for me, offering cooling while ensuring fresh air.

The Airmega Aim also has an auto mode. This mode changes fan speed according to air quality and saves energy. However, the remote has a limited 11-foot range, it can get loud on high settings, and its filters might need regular replacements.

The Coway Airmega Aim is an effective solution for small grow rooms. While it has some drawbacks, its advantages in air quality and convenience prevail.

  • Save

5. HATHASPACE Dual Filtration Grow Room Air Purifier

This air purifier is an excellent choice for small grow rooms due to its powerful performance and smart features.


  • H13 HEPA filter removes 99.9% of particles
  • Effective odor elimination with a honeycomb activated-carbon filter
  • Smart air quality sensor adjusts fan speed in real-time


  • Slightly larger and heavier than other models
  • No UK-compatible version
  • No filter change indicator

I recently tried the HATHASPACE Dual Filtration Air Purifier in my grow room. Its dual filtration effectively handles common pollutants, with the H13 HEPA filter removing 99.9% of particles as small as PM 2.5.

The purifier’s honeycomb-activated carbon filter effectively removes odors and VOCs. Additionally, its quiet fan efficiently cleans the air, making my grow room smell fresher.

A standout feature is its smart air quality sensor that auto-adjusts the fan based on real-time pollution detection, eliminating manual monitoring.

Some drawbacks include its larger size, lack of a UK version, and missing filter change indicator – but these aren’t deal-breakers for me.

  • Save

6. VEVOR Air Scrubber with 3-Stage Filtration Grow Room Air Purifier

The VEVOR Air Scrubber is an excellent choice for those seeking an effective and easy-to-use air purifier for their small grow room.


  • 3-stage filtration with H13 HEPA filter
  • 550 CFM airflow for improved air quality
  • User-friendly control panel with timer and filter indicator


  • May be too large for some spaces
  • No timer for auto-shut off
  • Filters may need frequent replacement

The 3-stage filtration system captures 99.97% of particles as small as 0.3 microns, effectively improving air quality.

The air purifier’s efficient copper motor supports an airflow of 550 CFM. Its control panel is user-friendly, offering adjustable airflow, a resettable timer, overheat protection, and a filter-change indicator.

The VEVOR Air Scrubber is suitcase-sized, which might not fit smaller spaces. Also, it lacks an auto-off timer, and filters may require frequent replacement based on usage.

  • Save

7. MORENTO Air Purifier – A High-Performance for Small Grow Rooms

The MORENTO Air Purifier is an excellent choice for those seeking a high-performance air purifier for small grow rooms with advanced features and a user-friendly interface.


  • Efficient dual-side air intake
  • Upgraded high-efficiency filtration system
  • Integrated PM 2.5 sensor and air quality monitoring


  • No rotation features like some competing models
  • The display may not be suitable for very light sleepers
  • May not come with all desired features at this price range

Designed with dual-side intakes, this purifier efficiently purifies up to 1076 sq. ft. It can remove particles as small as 0.3 microns for a healthier grow room.

The purifier’s PM 2.5 sensor provides real-time air quality feedback. This allows users to adjust fan speeds accordingly, making it perfect for maintaining optimal grow room conditions.

The purifier lacks rotation features seen in competitors but performs well overall. The bright display, however, may not suit light sleepers.

Operating quietly in sleep mode with a noise level under 24 dB and four fan speeds, the purifier ensures versatile operation without disrupting sleep.

  • Save

Benefits of using air purifiers in grow room cultivation

Improve Plant Health and Growth

Air purifiers improve plant health by removing airborne contaminants like dust and mold spores, resulting in a cleaner environment where plants absorb nutrients more efficiently.

Reduce the Risk of Mold, Mildew, and Pests

Air purifiers with efficient filters can greatly reduce mold, mildew, and pests in grow rooms by capturing harmful airborne particles, ensuring a cleaner growing environment.

Enhance Indoor Climate Control

Air purifiers enhance indoor climate control by regulating temperature and humidity, ensuring optimal conditions for plant growth.

Minimize the Spread of Diseases and Pathogens

Using air purifiers with high-quality filters like HEPA is crucial in grow rooms to prevent the spread of airborne diseases and pathogens that threaten plant health.

Odor Control

One of the key benefits of using air purifiers in grow rooms is odor control. Certain stages of plant growth produce strong odors. Air purifiers with activated carbon filters effectively eliminate these odors.

Improved Air Quality for Growers

Air purifiers not only benefit plants but also enhance air quality for growers by removing contaminants, making the environment healthier for extended work periods.

Allergy Relief

Air purifiers can provide relief to individuals with allergies. By capturing allergens like pollen and dust, they create a healthier breathing environment, especially for sensitive growers.

Ensuring clean and healthy grow room environments

Proper ventilation in grow rooms ensures fresh air flow, removing contaminants and preventing mold, thus promoting healthy plant growth.

Regular cleaning prevents dust accumulation that can clog air filters, ensuring a healthy grow room environment.

Monitoring and controlling humidity prevents mold growth and maintains plant health by using dehumidifiers or humidity controllers.

UV light and ozone generators effectively eliminate harmful microorganisms, providing protection against contaminants in grow rooms.

Air purifiers with True HEPA and activated carbon filters improve air quality in small grow rooms by removing particulates, odors, and VOCs.

When selecting an air purifier, consider its efficiency, noise, coverage, CADR rating, and filter replacement frequency. Popular choices include Coway AP-1512HH, AllerAir AirMedic Pro 5 HD MCS, and Amaircare 4000 VOCARB.

How do I manage the odor in my grow room?

Manage odor in your small grow room using carbon filters, odor-neutralizing agents, and proper exhaust systems.

Utilize carbon filters to effectively neutralize odors.

Use carbon filters in your grow room to trap and neutralize odor-causing molecules like VOCs. They are common in air purifiers for grow rooms.

Efficiently removes odorous particles from the air.Carbon filters need regular replacement to maintain optimal performance.
Helps maintain a clean and fresh-smelling environment.The initial cost of purchasing a carbon filter may be higher compared to other options.
Can be used alongside other odor control methods for enhanced effectiveness. 

Consider incorporating odor-neutralizing agents.

Incorporate odor-neutralizing agents like activated charcoal and essential oils. Charcoal absorbs unwanted smells, while essential oils like lavender mask odors and add fragrance.

Activated charcoal absorbs odors effectively.Odor-neutralizing agents may need frequent replenishment or replacement.
Essential oils offer a natural and aromatic solution to combat unpleasant smells.Some individuals may be sensitive or allergic to certain essential oils.

Implement a well-designed exhaust system.

Implement a well-designed exhaust system to remove odorous air. This system, crucial for odor management, replaces tainted air with fresh air.

Efficiently removes odorous air from the grow room.Installation of an exhaust system may require professional assistance.
Helps maintain optimal air circulation for plant growth.Regular maintenance is needed to ensure the system operates at its best.

Regularly maintain your ventilation system.

Regularly inspect and maintain your ventilation system, checking for blockages or leaks and ensuring proper airflow, to keep your odor management effective.

Prevents potential issues that could compromise odor control.Requires regular time and effort for maintenance.
Extends the lifespan of your ventilation system.Neglecting maintenance can lead to reduced effectiveness in odor control.

By implementing these strategies, you can effectively manage and control the odor in your small grow room, ensuring a clean and odor-free environment for healthy plant growth.

Grow room odor control systems

To effectively manage the odor in your small grow room, it’s crucial to explore advanced technologies that can eliminate unpleasant smells. Here are some powerful odor control systems you can consider implementing:

Photocatalytic Oxidation (PCO) or Hydroxyl Generators

PCO and hydroxyl generators break down odor-causing molecules via chemical reactions, neutralizing VOCs and contaminants for fresh, clean air.

Ozone Generators

Ozone generators release ozone molecules to neutralize odors but should be used cautiously, following manufacturer’s guidelines, as excessive ozone can harm humans and plants.

Negative Ion Generators

Negative ion generators release ions that bind to and weigh down odor-causing particles like dust and mold, resulting in cleaner air.

Integrated Odor Control Systems

For comprehensive odor control, consider an integrated system combining activated carbon filters, HEPA filters, UV air purifiers, and negative ion generators.

When choosing an air purification system for your small grow room:

  • Look for air purifiers with true HEPA filters, as they are highly efficient in capturing small particles and allergens.
  • Consider the square footage of your grow room to determine the size and capacity of the air purifier needed.
  • Opt for units that feature activated carbon filtration, as this is essential for removing odors and VOCs.
  • Check the Clean Air Delivery Rate (CADR) rating of the air purifier, which indicates its effectiveness in removing smoke, dust, and pollen.

How do I maintain the air quality in my grow room?

To ensure optimal plant growth and create a healthy environment for your plants, it is crucial to maintain good air quality in your small grow room. Here are some key steps you can take to achieve this:

  • Maintain temperature between 70-85°F (21-29°C) and adjust humidity based on the growth stage: 40-60% during the vegetative phase and 30-40% during flowering. Regularly monitor with a thermometer and hygrometer to prevent mold and promote healthy growth.
  • Use an air purifier with HEPA filters to eliminate airborne contaminants like dust, pollen, and mold spores. HEPA filters capture 99.97% of particles down to 0.3 microns, ensuring clean air circulation and reduced health risks.
  • Install fans or ducting to ensure proper airflow, distributing fresh CO2 evenly and preventing CO2 buildup. Efficient air circulation replicates outdoor conditions and boosts plant health.
  • Regularly maintain and clean equipment, including replacing filters as per manufacturer recommendations. Address any blockages or malfunctions promptly to maintain optimal air quality.

Checklist for choosing the best commercial air purifier for grow rooms

Selecting the right air purifier for your grow room is pivotal to ensuring optimal plant health and maintaining a contaminant-free environment. Here’s a checklist to guide you through the process:

Room Size CompatibilityEnsure the purifier’s coverage matches or exceeds your grow room’s size. For small grow rooms, the purifier should still handle the room’s air volume.
True HEPA FilterThe purifier should have a true HEPA filter, capturing 99.97% of particles as small as 0.3 microns, including pollen, dust, and mold spores.
Activated Carbon FilterA filter to remove odors, organic compounds, and chemicals. The thicker the carbon filter, the better its performance.
Air Change Rate (ACH)Preferably, the ACH should be at least 4, meaning the room’s air is exchanged every 15 minutes.
Noise LevelA noise level below 50dB is considered quiet for commercial units, ensuring minimal disruptions.
Energy EfficiencyConsider models with an ENERGY STAR rating or those known for efficient operation to manage energy bills.
Ease of MaintenanceFilters should be easily accessed, cleaned, or replaced. Filter change indicator lights are a bonus.
Durability and WarrantyChoose sturdy models, preferably with metal housing, and ensure they come with a comprehensive warranty.
Extra FeaturesUseful features might include UV-C light, ionizers (without ozone production), or smart air quality sensors.
Manufacturer ReputationOpt for reputable brands known for quality, and consider reviews and testimonials from other growers.

By following this checklist, you’ll be well on your way to selecting the best commercial air purifier to ensure your small grow room remains a clean, healthy environment for optimal plant growth.

Frequently Asked Questions (FAQs)

What are the top air purifiers suitable for small grow rooms?

When choosing an air purifier, consider essential factors such as true HEPA filtration efficiency, activated carbon filters for odor control, and UV purification to eliminate harmful particles.

We recommend options like Coway Smart Air Purifier Pro or AllerAir AirMedic Pro 6 Vocarb for their impressive performance in removing particulates and volatile organic compounds (VOCs).

With efficient air circulation and proper ventilation, these units create an ideal environment for your plants to thrive.

What size of an air purifier do I need for my small grow room?

The size of the air purifier you need depends on the square footage of your grow room. It’s essential to choose a model that can adequately cover the entire space to ensure effective purification.

Refer to the manufacturer’s specifications or consult with experts to determine the appropriate size for your specific setup.

Can an air purifier eliminate all odors in my grow room?

While high-quality air purifiers are designed to reduce odors significantly, they may not completely eliminate strong smells associated with certain plants or growing conditions.

However, they can help control and minimize odors by capturing airborne particles responsible for unpleasant smells.

How often should I replace the filters in my grow room’s air purifier?

The frequency of filter replacements depends on various factors, including the air quality in your grow room and the manufacturer’s recommendations.

Generally, it is advisable to replace filters every 3-6 months or as indicated by the manufacturer to maintain optimal performance.

Are there any specific features I should look for in a grow room air purifier?

When selecting an air purifier for your grow room, consider features such as multiple filtration stages (including activated carbon filters), adjustable fan speeds, low noise levels, and energy efficiency.

These features can enhance the effectiveness and convenience of the device in your cultivation space.

Can I use a regular household air purifier in my small grow room?

While a regular household air purifier may offer some benefits, it is recommended to use an air purifier specifically designed for grow rooms.

These specialized devices are equipped with filters that target and capture contaminants commonly found in cultivation environments, ensuring better results for your plants’ health and overall air quality.

How do air purifiers help maintain a healthy grow room environment?

Air purifiers play a vital role in maintaining a healthy grow room environment by removing airborne contaminants, such as mold spores, pollen, dust, and other particulate matter.

They help ensure that the air quality inside the grow room is optimal for plant growth, preventing issues like mold infestations and poor plant health.

Do I need a carbon filter in my small grow room?

In my opinion, using a carbon filter in a small grow room is a good idea, especially if you’re concerned about odors and volatile organic compounds (VOCs).

A carbon filter can effectively neutralize and absorb odors from the growing space, which promotes a cleaner environment for your plants and reduces potential issues with neighbors or landlords.

How can an air purifier improve plant growth in a small room?

Air purifiers give plants a cleaner environment in small rooms. This helps plants grow better.

Air purifiers remove things like mold spores, pollen, and dust. This stops problems like mold and bad airflow. This allows your plants to grow in an environment where they can better absorb nutrients, receive adequate light, and maintain overall health.

How important is air circulation in a small grow room, and can an air purifier help?

Air circulation is crucial in a small grow room. It helps to distribute heat evenly, maintain adequate CO2 levels, and prevent mold growth.

Some air purifiers are not made for air circulation. But their design can still move air because of their intake and exhaust. To further improve air circulation, consider pairing your air purifier with a fan or other air circulation equipment.

Recommended air purifier in a comparison table
Avatar photo

Emily Williams

My mission is to provide you with reliable and up-to-date information on air purifiers. As a dedicated air purifier enthusiast, I'm here to empower you to make informed decisions for your indoor air quality. From understanding different types of filters to exploring the latest technologies, join me on this journey to uncover the secrets to fresher, purer air. Feel free to reach out with any questions or suggestions – I'm always here to help!

More to Explore

Top-Rated Air Purifiers with Built-in White Noise for Restful Sleep

Discover the best air purifier and sound machine combos for a healthier home. Our top picks effectively remove pollutants while providing soothing white noise for better sleep. Find the perfect fit for your space, from compact to large room coverage. Enhance your indoor air quality and enjoy a more peaceful environment with these highly-rated, multi-functional devices.

Discover the Top Air-Purifying Houseplants That Thrive in Low Light

Discover the best indoor plants for low light that also purify the air. From the hardy Snake Plant to the elegant Peace Lily, these low-maintenance houseplants thrive in dimly lit spaces while effectively removing toxins like formaldehyde and benzene. Elevate your home's air quality and aesthetics with these NASA-approved air-purifying plants, perfect for bedrooms, offices, and more. Find the ideal plant for your space in our comprehensive guide.

Leave a Reply

Your email address will not be published. Required fields are marked *

5 Must Have EMF-Free Purifiers Get the Most from Your Dyson Air Purifier Without a Remote 4 Eye-Opening Examples: Dyson Air Purifiers vs. Mold Check Out Moss-Powered Eco-Friendly Air Purifiers 9 Fascinating Insights about Bissell Air220 Air Purifier