An air humidifier will help maintain the required relative humidity in your grow rooms. Humidifiers keep your plants alive and thriving! Plus, they make sure the air is safe for the grower too.
But picking the best humidifier for grow tent can be an overwhelming task. With so many models to choose from and features to consider, how do you know which is the right one?
Lucky for you, you’ve come to the right place!
In this article, I reviewed 9 of the best grow tent humidifiers and shared a buying guide to keep in mind when choosing the suitable humidifier for your tent. Keep reading!
The 9 Best Grow Tent Humidifiers
Many plants, including cannabis plants, require high humidity to yield the best results. Getting the best humidifier for grow tents is a must for high-value produce!
To find the right kind of grow tent for your needs, read our article on the best grow tents for cannabis.
Here are 9 of the best grow room humidifiers you can consider:
1) Best Overall – Pure Guardian H4810AR Ultrasonic Warm and Cool Mist Humidifier
Key Features
- Operation Mode: Ultrasonic Cool and Warm Mist Humidifier
- Capacity: 2 Gallons
- Run Time: 120 hours
- Filter Type: Filterless
- Material: Silver
- Dimensions: 7.75 x 15.03 x 12.48 inches
- Weight: 5.55 pounds
- Where to buy: Amazon.com
This best grow tent humidifier will wish dry air goodbye!
The Pure Guardian H4810AR ultrasonic cool and warm mist humidifier is the perfect device to keep your plants nice and healthy, achieving the relative humidity needed in the room.
And if you decide to use it other than your grow room, it will keep you safe from colds, allergies, and dry skin.
Among cool and warm mist humidifiers, this Pure Guardian delivers the most excellent performance with two mist outputs, three-speed settings, and a low water indicator that tells you when it’s time to make a refill.
Plus, it can carry up to 2 gallons of water and run for up to 120 hours on low mode. That saves you the hassle of constantly refilling the tank. These features make it ideal for larger tents up to 600 square feet.
And did I mention this Pure Guardian ultrasonic humidifier operates super quietly? It’s ideal to have even while you sleep!
Its design is pretty sleek and portable too. It is compact enough to fit any room corner and not be too obtrusive. It also features clean silver protection that prevents mildew and slimy mold growth.
A timer, soft glow night light, and an extra aromatherapy tray are available if you decide to take this humidifier out of your grow room or grow tent and to your bedside at night.
Pure Guardian is true to their mission of creating powerful, innovative, and safe technologies. This cool and warm mist humidifier did not disappoint!
PROS
- Ultrasonic humidifier with cool and warm mist options
- Large tank capacity
- Ultra-quiet operation
- It has a low water indicator
- Compact and portable
- Long run time
- Mold and bacteria repellent
CONS
- Tanks can be too big and inconvenient to fill from a faucet
- Distilled water is preferred to prevent mineral dust
- No automatic mode
Rating: 4.8/5
2) Best Value – Everlasting Comfort Cool Mist Humidifier
Key Features
- Operation Mode: Ultrasonic Cool Mist Humidifier
- Capacity: 1.6 Gallons
- Run Time: 50 hours
- Filter Type: Filterless
- Material: Plastic
- Dimensions: 11.02 x 6.69 x 13.02 inches
- Weight: 3.1 pounds
- Warranty: 2 Years
- Where to buy: Amazon.com
The Everlasting Comfort cool mist humidifier is my next top pick for its great value-adding qualities. I also believe it to be the best grow tent humidifier for a 4 by 4 grow space.
Although it’s a little more expensive than other humidifiers, you can’t deny its compact design and impressive 1.6-gallon capacity.
This can cover grow rooms of up to 500 square feet and run for 50 hours without needing a refill.
That’s twice the capacity of smaller cool mist humidifiers! It can run for about a week on one refill on its lowest mist output if used only at night.
The Everlasting Comfort, a cool mist humidifier, is no ordinary device. It has a higher multidirectional mist output that is fully adjustable to achieve optimal humidity levels of 40 to 60 percent.
It also features a 360-degree nozzle so you can choose the direction it aims for.
And if that’s not enough, this air humidifier works silently at less than 35 dB and can automatically shut off when the water level is too low. It’s a great safety feature, especially when you don’t always monitor the room.
If you wish to take this ultrasonic humidifier to the bedroom, this large room humidifier even comes with a built-in essential oil tray, perfect for enjoying aromatherapy.
Plus, Everlasting Comfort offers a 2-year replacement policy. It’s good to know they value customer product experience. But I doubt you’ll be unsatisfied with this best humidifier anyway!
PROS
- Ultrasonic cool mist technology
- Quiet operation
- Compact and portable design
- Large 1.6-gallon water tank
- Good for large grow tents
- 50-hour run time
- Auto shut-off feature
- No need for a filter
- 2-year replacement policy
CONS
- Expensive
- Not the easiest to clean
- Soft or distilled water needed to avoid mineral dust
Rating: 4.8/5
3) Best Budget – Pure Enrichment MistAire Ultrasonic Cool Mist Humidifier
Key Features
- Operation Mode: Ultrasonic Cool Mist Humidifier
- Capacity: 1.5 Liters
- Run Time: 25 hours
- Filter Type: Filterless
- Material: BPA-Free PS and ABS Plastic
- Dimensions: 6 x 8 x 9 inches
- Weight: 1.35 pounds
- Warranty: 5 Years
- Where to buy: Amazon.com
If you’re looking for the best grow tent humidifier on a budget, the Pure Enrichment MistAire is perfect!
This grow tent humidifier is best for smaller spaces of up to 250 square feet. It doesn’t take much room but still has more than enough power to maintain the perfect humidity level for your grow room.
This compact humidifier emits 80 ml per hour with high and low settings to choose from and can run for up to 10 hours with a single refill. This is just the right operation for bedrooms, baby nurseries, offices, and indoor plants.
Enjoy instant dry air relief on this one, plus a relaxing blue nightlight that also functions as a way to see the level of water left in its tank. And with an ultra-quiet operation, you’ll get restful nights of sleep with the Pure Enrichment MistAire.
This tiny grow room humidifier even comes with a 360-degree mist nozzle for a consistent and balanced humidity in your grow room. For the benefit of the grower, this can also relieve you from congestion, cough, colds, allergies, dry skin, and other sinus issues.
Its other notable features include a sleek and transparent 1.5 L tank that can easily be filled through the tap. It also has an automatic shut-off feature, so you can easily run this humidifier overnight.
This BPA-free humidifier will come in a package with an AC power adapter, disk cleaning brush, and a 5-year warranty. What a deal!
PROS
- Easy-to-fill water tank
- Compact and portable design
- 360-degree rotatable nozzle
- Filter-less
- The efficient output, given its size
- Energy-saving
- Very quiet operation
- Includes a built-in night light
- Very affordable
CONS
- It only has two misting level settings
- Buttons may be too sensitive to touch
- Short run time
- Smaller water tank capacity
Rating: 4.8/5
4) TaoTronics Cool Mist Humidifier
Key Features
- Operation Mode: Ultrasonic Cool Mist Humidifier
- Capacity: 1.59 Liters
- Run Time: 100 hours
- Filter Type: With Filter
- Warranty: 30 months
- Where to buy: Amazon.com
The Taotronics is my pick for the best humidifier for grow tents with at most 500 square feet of coverage.
Buying separate grow tent humidifiers can be expensive if you have multiple grow tents in one large room. Taotronics can be the solution to all that!
Its water tank can hold up to 1 gallon of water to continuously operate for 30 hours in the lowest mist setting. If you up it a notch, it can run for up to 12 hours!
This grow tent humidifier means serious business. It delivers a consistent, even fine mist with its powerful fan and 360 degrees rotatable nozzle.
Although fans are notable for their noise, this device astoundingly functions at less than 27 dB. That’s perfect even for your bedroom!
This humidifier also comes with a LED display and hygrometer so you can monitor relative humidity levels conveniently at any time. With that, you can be assured your plants are getting the right amount of moisture in their environment.
This Taotronics humidifier doubles as a night light with an auto shut-off feature.
When it comes to cleaning, it is perfectly designed for total ease with its wide tank opening. Its use of filters also assures contaminants do not come with the mist. These filters are also washable for long-lasting use.
Last but not least, the Taotronics has comprehensive safety features, including boil-dry protection that automatically shuts off the humidifier when empty and a durable nano-coated circuit board that prevents water damage.
PROS
- Large tank capacity of 1 gallon
- 500-square feet coverage
- Built-in LED display and hygrometer
- Quiet function
- Auto shut-off feature
CONS
- Not the easiest to refill due to its size
- Filters need to be replaced after a while
Rating: 4.8/5
5) Levoit LV600HH Hybrid Ultrasonic Humidifier
Key Features
- Operation Mode: Vaporizer, Ultrasonic Cool Mist Humidifier
- Capacity: 6 Liters
- Run Time: 50 hours
- Material: Acrylonitrile Butadiene Styrene
- Dimensions: 7.7 x 11.6 x 11.3 inches
- Weight: 4.92 pounds
- Where to buy: Amazon.com
Next on my best humidifier for grow, tent list is the Levoit LV600HH Hybrid Ultrasonic Humidifier. This grow tent humidifier is a crowd-pleaser for its many excellent features.
It’s advanced with its remote-controlled humidity and moisture output and dual cool and warm mist humidifier. It’s a great idea to customize the humidity levels of your temperature-sensitive plants from season to season.
But even if you have user control over its current humidity level, the Levoit grow tent humidifier also has a built-in humidity sensor that can assess and adjust how much humidity is needed for your grow room.
It’s highly efficient, especially for a larger grow room of up to 753 square feet. It can provide perfect humidification at speeds four times faster than the average humidifier.
It can also raise RH levels by 10% in just twenty minutes. With this, it has a maximum run time of 50 hours on one water tank.
Aside from all that, the Levoit has an auto shut-off feature when the water tank gets empty. Its settings are displayed on a sleek LED screen on its front. It also allows you to set schedules and timers.
Cleaning this unit is a breeze with its tank located at the back of the humidifier. Its large opening makes it easy to clean harder-to-reach corners.
And being a hybrid ultrasonic humidifier, expect a quiet and peaceful operation with this one. If you’re also keen on using this in the bedroom, adding your favorite essential oils in its built-in aroma box will put you on snooze in no time!
PROS
- Warm or cool misting outputs
- Remote controlled
- Built-in humidity sensor
- Large capacity
- Long run hours
- Easy to use and maintain
- Quiet operation
CONS
- The sensor is not accurate over time
- Some users experienced some water escaping from the tank
Rating: 4.8/5
6) Vornado EV100 Evaporative Whole Room Humidifier
Key Features
- Operation Mode: Evaporative Humidifier
- Capacity: 1 Gallon
- Run Time: 25 hours
- Filter Type: Filter Included
- Material: Plastic
- Dimensions: 8 x 13 x 12.3 inches
- Weight: 5.3 pounds
- Warranty: 5 Years
- Where to buy: Amazon.com
This next best grow tent humidifier is built to perfection. The Vornado EV100 Evaporative Humidifier is certified, safety-tested, and warrantied for use in the United States.
It boasts a Vortex Action technology that promises balanced humidification. You can control humidity levels of 40 to 60 percent with just a few buttons. That’s the ideal level for plants to grow.
What I also love about this grow room humidifier is its 1-gallon tank capacity that can circulate humidified air in as big as 300 square feet of space. It can run for up to 24 hours without refilling.
The Vornado EV100 has three fan settings at low, high, and auto and six output levels at 40-60% or continuous. The lower the setting, the longer it can run on one water tank.
With its patented SimpleTank system, this humidifier’s clear water tank will help you determine whether it needs to be cleaned or refilled.
Aside from the tank, the Vornado comes with an integrated carrying handle, removable cap, and outlet grill for portability.
It also uses a wick that filters out any contaminants in the mist. This, however, needs to be replaced every month or so.
Plus, if you choose Vornado, you get a 5-year warranty if it doesn’t meet your expectations. However, you have to be in the U.S. to make any claims.
PROS
- Lightweight, even with a big water tank
- Many settings and output levels to choose from
- Easy to maintain
- Well-balanced and consistent humidification
CONS
- It may not function with other external devices
- All warranties are voided if outside the U.S.
Rating: 4.8/5
7) VIVOSUN Cool Mist Humidifier
Key Features
- Operation Mode: Ultrasonic Cool Mist Humidifier
- Capacity: 6 Liters
- Run Time: 8 hours
- Material: Plastic
- Dimensions: 16.5 x 11.38 x 7.95 inches
- Weight: 5.5 pounds
- Where to buy: Amazon.com
The VIVOSUN Cool Mist Humidifier is the quick fix to a stuffy grow room, keeping a healthy constant humidity level. Not only is it perfect for a grow room, but it’s great for the elderly, babies, and pets too!
The VIVOSUN humidifier is ideal for smaller grow tents up to 250 square feet. Its water tank capacity can hold up to 1.5 gallons and run for an average of 20 hours. Plus, it is energy efficient, using 85-90% less energy than most humidifiers.
The VIVOSUN’s features include a built-in filter, air ionizer, and essential oil diffuser. Together, these create cleaner and fresher air.
Like most ultrasonic humidifiers, the VIVOSUN operates quietly at less than 38 dB. You can even set it on sleep mode, so it switches off its lights and sounds.
It also has a timer function with 1, 2, 4, and 8-hour options and an auto shut-off feature that automatically turns the humidifier off when the water tank is drained or removed.
It even has a 365-degree rotating nozzle for an even distribution of mist. And with 5 humidity settings (low, middle, middle-high, high, and turbo) and 4 mist outputs, what’s not to love?
PROS
- Remote controlled with many settings
- Ultrasonic humidifier
- Quiet operation
- 20-hour run time
- Energy efficient
- Night sleep mode
CONS
- The water tank would need daily refilling
Rating: 4.8/5
8) AIRCARE Space-Saver Evaporative Humidifier
Key Features
- Operation Mode: Cold Evaporative Humidification
- Capacity: 6 Gallons
- Run Time: 6 hours
- Filter Type: Trapmax Filter Technology with Protection
- Dimensions: 17.5 x 12.5 x 22.5 inches
- Weight: 14 pounds
- Warranty: 2 Years
- Where to buy: Amazon.com
This AIRCARE evaporative humidifier has the biggest capacity with a 6-gallon water tank, delivering perfect cold evaporative humidification for up to 70 hours without refilling.
It is best for a 5×5 grow room, or 2700 square feet grow area.
The AIRCARE evaporative humidifier works efficiently in a grow room where moist air can be circulated well. It can adjust humidity from 5% to 65% while eliminating virus and germ particles in the air.
That’s thanks to its wick, which can absorb and evaporate accumulated minerals from its water. This wick filter, however, needs to be cleaned every 14 days and replaced once every season.
It has great antimicrobial protection that prevents the growth of algae and bacteria in your machine.
Lastly, what is excellent about this humidifier is its convenient digital control panel where you can select from 3 fan speeds: nighttime, medium and high speeds.
PROS
- Compact and portable design
- Easy to clean
- The filter has anti-microbial protection
- Large water tank capacity
- Long run time
CONS
- Mist output is one directional
- Exposure to chemicals like benzene
Rating: 4.8/5
9) Homech Cool Mist Humidifier
Key Features
- Operation Mode: Ultrasonic Cool Mist Humidifier
- Capacity: 1.06 Gallon
- Run Time: 60 hours
- Warranty: 30 Months
- Where to buy: Amazon.com
Last but not least, our best grow tent humidifier is the Homech Ultrasonic Cool Mist Humidifier. It has a supreme quiet operation at less than 26 dB and great features every homeowner and green thumb will love!
This cool mist humidifier fits a grow room or grow tent up to 430 square feet. Its 1.06-gallon tank can last 12 to 60 hours of run time.
Thanks to its 360-degree rotating nozzle, humidity levels are consistently maintained, and moisture is directed to where it is needed most.
When it comes to cleaning, this humidifier is intentionally designed with an inbuilt anti-mold tech, so the cool mist is always clean and crisp. It is also very safe, with an auto shut-off safety feature, low water warning, and a leak-free design.
PROS
- Ultrasonic, quiet operating
- Auto shut-off with dry burn protection
- 360-degree nozzle spray
- Easy to clean
- 12-60 hours of run time
- Anti-mold protection
- Filter-free and dustproof
- Fully adjustable misting settings
- Low water indicator
CONS
- Requires frequent refilling
- It cannot be used with essential oils
Rating: 4.8/5
Why Do You Need A Grow Room Humidifier?
Taking care of tropical plants entails some investment for them to thrive. A humidifier for grow tents is one must-have tool. Here’s why:
- A grow room humidifier helps plants process photosynthesis
- They control the moisture in the room, ensuring healthy air humidified at optimal levels
- A good grow tent humidifier aids in increased plant yields and plant size
- They assist in faster root development
- They regulate humidity levels; too low or too high humidity can kill your plants!
- To keep your grow tent cool, check out the best fan for grow tents.
- Prevent the presence of bacteria, dust, and other irritants
- Prevents infections, irritations, and allergies for growers who are sensitive to a grow room’s dry air
What Are the Different Types of Humidifiers?
Most humidifiers nowadays are ultrasonic, but evaporative and impeller models are also available. You will often find a humidifier that emits both cool and warm mist, doubles as an air purifier, and with extra features that come with an added cost.
Let’s talk about the 3 main types of humidifiers in the market today:
Ultrasonic Humidifiers
Ultrasonic humidifiers use a vibrating nebulizer to create a fine mist from water droplets. Since this device does not rely on a fan, it is the quietest humidifier you can find.
Ultrasonic mist humidifiers are easy to maintain too. Most models don’t use filters either, making them easy to clean.
Some offer extra features like an air purifier feature. Naturally, these come off as more expensive.
Evaporative Humidifiers
Evaporative humidifiers use a fan to blow air into a moist wick filter. This helps retain moisture and facilitates the natural way of evaporation through osmosis.
This type of humidifier is self-regulating. They can measure and respond to the current humidity level in your grow room or tent.
The downside is that they can be too bulky and noisy for your liking because of its fan.
Impeller Humidifiers
Impeller humidifiers are the cheapest humidifiers you can find. They are mechanical, using a rotating disc to direct water into a diffuser to transform fine droplets into mist released into the air.
Because of their build, these humidifiers can get quite noisy during operation and are a little tedious to maintain.
How Can You Choose the Best Grow Room Humidifier?
Before burning your brows by searching the internet for the best grow room humidifier, there are important humidifier features to consider so you won’t regret your purchase!
For starters, the size of your space, the type of plants you are growing, and your climate should greatly affect your decision.
Most plants are happy and healthy at 40 to 80 percent relative humidity. Ensure you measure your humidity levels before installing a humidifier in your grow tent. A hygrometer can easily get that done.
Here are other factors to help you choose the perfect grow room humidifier:
Room Coverage or Capacity
Humidifiers are designed to function to a certain extent depending on the size of the space. Make sure your humidifier’s capacity matches that of your grow room.
A humidifier covering up to 100 square feet is suitable for a small grow tent.
Larger grow tents and rooms will require a much larger capacity. Look for humidifier models that can supply up to 600 square feet.
The bigger the capacity of the humidifier, the more expensive it is.
Water Tank Capacity
A larger tank means the more water it can contain, thus the longer a humidifier operates without needing a refill. A 1-gallon tank will need refilling for about 12-16 hours.
If you want to save yourself the hassle, and refill your humidifier tank just once a day, go for water tank capacities of 2-3 gallons.
Humidity Settings
The more settings you have, the easier it is to arrive at your desired humidity level for your plants. Having 3 settings should be sufficient.
Type
The 3 main types of humidifiers are evaporative, impeller, and ultrasonic. Ultrasonic humidifiers are the most high-tech and quiet. They come at a heftier price tag.
Evaporative and impeller mist humidifiers are cheaper but are noisy. An electric humidifier or humidifier that doubles as an air purifier might also be your preference.
Cleaning
Since humidifiers carry a ton of moisture, they are prone to bacterial and mold spores. Choosing a humidifier that is easy to dismantle and clean is important.
If your humidifier has a filter, this also needs to be cleaned and replaced regularly to avoid clogging and developing mold particles.
Portability
Even if it is a large model, a humidifier should be easy to move around and store. The water container should be easy to work with as you must fill it out regularly.
Safety Features
An electronic humidifier with safety features like an automatic shut-off or a shutdown timer helps prevent over-humidification in your grow tent.
Some models feature an air purifier and adjustable mist.
Noise Level
Most humidifiers nowadays are ultrasonic, which means they don’t use noisy fans. If you have an evaporator or impeller humidifier, consider where you plan to place it.
Keep it far from your bedroom, or else you won’t ever get a good night’s sleep!
Filter Replacement
Some grow tent humidifiers come with filters. Depending on the type and brand of humidifier, these may need to be replaced weekly, monthly, or annually to prevent mold growth.
You can try washing the filter, but it’s no guarantee it will still be useful afterward.
Frequently Asked Questions (FAQs)
Compared to other grow room tools, humidifiers are easy to operate. But even so, you may still have a few questions about how to use them.
Here are some of the FAQs about grow room humidifiers:
Do I Need a Grow Tent Humidifier?
Exposing your beloved plants to direct sunlight and the unpredictable forces of nature can result in them drying out or, worse, dying. Growing them in a thriving environment like a grow tent will help you control their yield.
A humidifier can be of great help when managing the relative humidity in the room.
However, not all grow rooms will require it, depending on the current climate. For some, they may be helpful on a seasonal basis.
Some people prefer getting heaters to control the humidity of their grow tent! Check out the best grow tent heaters if you plan on doing that.
How to Maintain Ideal Humidity Levels?
If your grow tent’s temperature or relative humidity level is too low, you will need to increase it for healthy plant growth.
For tips on how to raise the humidity in your grow tent, please read our article on this topic.
Here are some tips for maintaining ideal humidity levels in a grow room:
- Grow a variety of plant sizes in the same tent
- Place a grow tent humidifier inside the room
- Place wet towels close to air holes
- Use a mist spray bottle to add mist if a humidifier is absent manually
- Humidifier substitutes like a low-volume mist atomizer or fogger can work too
To learn how to control the humidity in your grow tent, read our article on this topic.
Summary
Here are the best humidifiers you can get for your grow tent!
Best Budget – Pure Enrichment MistAire Ultrasonic Cool Mist Humidifier
Key Features
- Operation Mode: Ultrasonic Cool Mist Humidifier
- Capacity: 1.5 Liters
- Run Time: 25 hours
- Filter Type: Filterless
- Material: BPA-Free PS and ABS Plastic
- Dimensions: 6 x 8 x 9 inches
- Weight: 1.35 pounds
- Warranty: 5 Years
- Where to buy: Amazon.com
Get this affordable, compact, powerful grow tent humidifier for your small grow room.
Best Value – Everlasting Comfort Cool Mist Humidifier
Key Features
- Operation Mode: Ultrasonic Cool Mist Humidifier
- Capacity: 1.6 Gallons
- Run Time: 50 hours
- Filter Type: Filterless
- Material: Plastic
- Dimensions: 11.02 x 6.69 x 13.02 inches
- Weight: 3.1 pounds
- Warranty: 2 Years
- Where to buy: Amazon.com
If you have extra cash, get this feature-pack cool mist humidifier, perfect for your larger grow tents.
Achieve the optimal relative humidity for your plants to thrive without needing to refill the water tanks constantly.
Best Overall – Pure Guardian H4810AR Ultrasonic Warm and Cool Mist Humidifier
Key Features
- Operation Mode: Ultrasonic Cool and Warm Mist Humidifier
- Capacity: 2 Gallons
- Run Time: 120 hours
- Filter Type: Filterless
- Material: Silver
- Dimensions: 7.75 x 15.03 x 12.48 inches
- Weight: 5.55 pounds
- Where to buy: Amazon.com
You won’t go wrong with this reasonably priced grow tent humidifier that can emit warm and cool mist for your temperature and moisture needs.
It comes with a large tank perfect for a large grow tent.
Conclusion
Using a grow room or grow tent is the easier path to growing plants. But it does require some investment in tools and special devices like a humidifier.
A reliable humidifier will help you manage the temperature and moisture inside your grow tent, so your plants remain healthy and thriving.
But before buying a humidifier, do make sure to consider the factors we mentioned above. Considering the products I reviewed won’t hurt too. I assure you, you won’t regret it!
