Best Humidifier for Grow Room

This guide is for anyone who is looking for the best humidifier for grow room. We have done plenty of research to shortlist the best humidifiers that we think will work to help your plant grow beautifully. Plants require different levels of humidity levels depending on at what stage of growth they are. For instance, at younger stage plants need at least 60 to 70% moisture levels.


Young seedlings need more moisture because their roots aren’t as developed yet, and the idea is to help them absorb moisture through their leaves to the maximum capacity. In this guide, after a lot of research and inspection, we bring you the 7 best humidifiers for grow room with an in-depth review of all the necessary features you should be aware of before you make a purchase.


However, if you don’t have a lot of time on your hands then you can check out our top pick and go over the few necessary features that help the Pure Enrichment MistAire Ultrasonic outshines the rest of the products in this review. It uses ultrasonic technology, comes with 2 mist settings, 1.5 liters water tank capacity, and a 360° mist nozzle. It is perfect for any medium-sized grow room and the 5-year warranty is a great inner customer-satisfaction when it comes to investing in a product.


Although, we highly recommend that you go through this guide because you might find a humidifier that better suits your grow room needs.

Best Humidifier for Grow Room

The comparison table below lists all the Best Humidifier for Grow Room for making the selection easier.

Model NameBest Features Price 
Pure Enrichment MistAire Ultrasonic
Comes with 5-year warranty$$ Check Price
Honeywell HCM350W Germ Free Cool Mist
(Editor’s Choice)
Uses evaporative technology$ Check Price
TaoTronics Humidifiers, 4L Cool Mist
360° nozzle$ Check Price
AZEUS Humidifiers360° rotating double nozzle$$ Check Price
Vornado EV100Lightweight$$ Check Price
Cool Mist HumidifierComes with a remote control$$ Check Price
Vornado UH100 Ultrasonic Cool Mist HumidifierFan assisted humidification$$ Check Price

Best Humidifier for Grow Room Reviews

Are you ready to look at all the products and their features to make an informed decision? Keep reading below to find out which humidifier meets your grow room requirements!


1. Pure Enrichment MistAire Ultrasonic

Top Pick

Pure Enrichment MistAire Ultrasonic

Automatic Shut-Off and Night Light Function – Lasts Up to 16 Hours

OPTIONAL NIGHT LIGHT: Offers soothing glow for maximum relaxation

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The first product we are going to be reviewing is the Pure Enrichment MistAire Ultrasonic, the manufacturer Pure Enrichment has been manufacturing humidifiers since 2010, it is a California based company thoroughly designing and rigorously testing products to meet quality. Ultrasonic Technology safely and gently moisturizes the air for approximately 16 hours with continuous operation on high-setting.


There are 2 mist settings to choose from (High and Low) to easily adjust the speed and the direction of the mist according to your preference. The 1.5 liters tank is ideal and provides ample distribution for medium-sized rooms. It comes with an optional night-light as well. When it comes to the sound, the humidifier does not make a lot of noise it is pretty quiet in its operations.


The water tank is easy to fill, the disc cleaning brush comes in handy with user manual instructions to clean the humidifier when necessary. Another interesting feature is the 360° mist nozzle which efficiently directs the mist-flow in areas that need moisture making sure the room is evenly humidified.


The automatic shut down feature is a must-have in any humidifier for your grow room and this product offers you that. The humidifier will automatically shut down when the water level is low or when the water tank is removed. This product comes with a 5-year warranty that is quite exceptional and shows that the manufacturers are sure about the functionality of their products making it a good investment for your grow room.

  • Automatic shut down.

  • 5-year warranty. 

  • 360-Degree Mist Nozzle. 

  • Only 16 hours of runtime.


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2. Honeywell HCM350W Germ-Free Cool Mist

Top Pick

Honeywell HCM350W Germ-Free Cool Mist

Cool Mist Humidifier White

Honeywell Humidifiers: Humidity levels in your home between 40-60% can make the air feel warmer & improve your breathing comfort, sleeping, nasal congestion & dry skin.

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Honeywell is a very well-renowned company and has been in the market for more than 100 years now. The Honeywell HCM350W Germ-Free Cool Mist comes with a 1-gallon water tank and weighs about 9.4 pounds. In a low setting it can run up to 24 hours and it is quite quiet in its functioning as well. It is perfect if your grow room is medium-sized.


It features a very interesting technology, a feature that you will not find in many humidifiers. The Evaporative Technology which blows moisture off a wicking filter, which helps to evaporate the water quickly into the air. With this humidifier, your grow room will not be overly humidified because such is the evaporative technology used in this humidifier.


The medium speed settings are for maintaining the humidity at a moderate level, while the high-speed settings help to increase the humidity levels at a quicker pace in a grow room. The humidity levels can be maintained approximately 40% to 60% and cover 500 square feet of the area easily.


It adjusts the moisture-levels in the room automatically making it ideal for a grow room because this way you do not have to worry about changing the settings every now and then. One of the key questions when it comes to products like these is how easy they are to maintain. In concern to this product, the humidifier is recommended to be cleaned after every 28 days and the cleanliness of the mist is dependent on the water you are using.

  • Evaporative technology.

  • Automatic humidity levels regulation.

  • Runs up to 24 hours on low setting.

  • Does not come with an automatic shutdown option.



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3. TaoTronics Humidifiers, 4L Cool Mist

Top Pick

TaoTronics Humidifiers, 4L Cool Mist

LED Display with Humidistat, Waterless Auto Shut-off (1.06 Gallon, US 110V)

Quiet Operation for Bedroom Use: Ultrasonic humidifiers are incredibly silent, produces less than 38 dB of noise; perfect for your baby and a disturbance-free sleep at night

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On to our third product in this review guide for the best humidifiers for grow room. One of the features we really applaud this product is its quiet operations. It actually produces less than 38dB of noise, incredible, isn’t it? Noisy humidifiers can be really annoying even if you are buying it just for your grow room.


This humidifier has 4 liters water tank which exceptional. A gallon of water will last till 12 to 30 hours on a full tank. In terms of runtime, we don’t think it could get any better. The informative LED display comes in handy; you can see the relative humidity through it which is determined by the in-built humidistat which is quite convenient for a grow room.


You have the option to select from three mist settings, you can easily set the humidity levels from 40% to 60% depending on the need of your plants. It is safe to use and automatically shuts-off when the water runs out, you will not have to worry about the humidifier wasting electricity with this feature. One less thing to worry about don’t you think so?


The water is clean and odorless, the microporous cartridge filters any micro-organisms and foul odor. Just like humans, plants also need fresh clean water for their growth for them to grow beautifully. The 360° nozzle ensures that there is maximum coverage and no area in the room is left with dry air which what every grow room requires, to help moisture reach every plant in the room. There is a water handle to make the process of cleaning and refilling convenient. We think it is one of the most decent humidifiers in the market.

  • 360° nozzle.

  • 4 liters water tank capacity.

  • Only 38dB noise level.

  • Microporous filter needs changing every 4 months.



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4. AZEUS Humidifier

Top Pick

AZEUS Humidifier

Lasts up to 50 Hours, Auto Shut-Off (BPA-Free)

EFFICIENT HUMIDIFIERS FOR LARGE ROOM – Moisture process and capacity are critical requirements when it comes to treating dryness. 360 degree rotating double nozzles of cool mist humidifier covers a wide humidifying area up to 377sq. ft.

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The powerful AZEUS Humidifier uses innovative technology, the AZEUS atomizer breaks water into tiny water particles and distributes the mist efficiently throughout the room via new air duct based on fluid mechanics. This technology ensures that water does not reach the floor and spreads evenly in the air to help maintain the humidity levels of the room.


This humidifier is ideal for large-rooms, and as you know moisture levels and the process is a critical requirement when it comes to a grow room, the 360° rotating doubles nozzle makes sure 377 square feet area is covered evenly. It has a 5-liters water tank capacity and runs up to 10 – 50 hours on maximum or minimum mist mode reducing the hassle of refilling the tank multiple times in a day.


The ultrasonic technology with the ceramic diaphragm reduces the noises, it has 28dB noise levels which is actually quieter than a computer! It can easily maintain the humidity levels at 40 to 60. The manufacturer AZEUS provides 24/7 live customer support for any queries or problems with the humidifier.


It is recommended to clean the humidifier at least once a week because dust and scale can build up which can get in the way of producing clean mist. You are not supposed to add water directly to the base as the water will leak onto the surface the humidifier is placed on. Overall, this humidifier is ideal for anyone who wants a humidifier easy on the pockets.

  • 360° rotating double nozzle.

  • 5-liter water tank capacity.

  • Quieter than a computer.

  • Does not shut off automatically.


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5. Vornado EV100

Editors Choice

Vornado EV100

1 Gallon Capacity, White

INTELLIGENT HUMIDIFICATION — EV100 senses how much humidity and circulation is needed to maintain your ideal environment and makes adjustments automatically. The 1-gallon tank capacity provides up to 1-gallon output every 24 hours.

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If you are looking for a humidifier for a large grow room then the Vornado EV100 is quite the fit for your needs. It brings you modernity, different fan controlling options along with minimalism. It lets you control humidity levels between 40% to 60% and the air outlet grill encourages the vortex circulation. It is very easy to operate because it has electronic push buttons which is better than a knob. How easily you can control should be on the top of your priority when you are looking to buy one!


What we like about this product is its ability to circulate moisture air up to 300 square feet with its 1-gallon tank capacity with a runtime of 24 hours. It will last even longer if the fan setting is on low-speed. It comes with three fan setting options (Low, High, and Auto.) It lives up to its name you can say. The wick is responsible for filtering out impurities and has to be changed every one month or so.


The SimpleTank system is what makes this humidifier great for growers, as the clear water tank allows you to keep track of the water levels and if the tank needs to be cleaned. The built-in humidistat allows for controlling the humidity levels in auto mode. Its natural evaporation technology eradicates the visibility of white mist and the weight of the product is super light in comparison to its huge capacity water tank making it easy to move around in your grow room.


It is a U.S certified product, it meets the safety standards and also meets the U.S voltage requirements. Moreover, it has a unique design built with simplicity and keeping in mind functionality. It ensures that humidification in your grow room is uniform and it is easy to clean as well. The integrated handles make it easy to carry and it comes with a 5-year warranty.

  • Evaporative technology.

  • SimpleTank System.

  • Lightweight.

  • Only meets U.S voltage requirements.


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6. Cool Mist Humidifier

Editors Choice

Cool Mist Humidifier

Air Mist 6l Large Room Humidifier – White

3 INTENSITY MODES with ANION FUNCTION: Humidifier Supports the Necessary Anion Balance in the room For Your Family Health with 3 Modes of Humidification: high, medium, low (runs up to 18, 31 or 62 hours)

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The feature most prominent about the Cool Mist Humidifier by Diverso Devices is the huge water tank capacity it brings to the table. It has a 6.3-gallon capacity, the design of the product is minimalistic and high-grade. There high-quality of the body material ensures that there are absolutely no leakages, wet surfaces, or white dust experienced. The manufacturer promises 62 hours of runtime in one-refill on low mode, a dream come true isn’t it?

There are 3 intensity modes to choose from (High, Medium, and Low), the runtime on high mode is 18 hours and on medium mode its 31 hours which is very impressive. It offers whisper-quiet operations and the light of the humidifier can be turned off as well. The intelligent LED-light display is the cherry on top, along with the intuitive touch-button controls which are easy to use. The display shows the actual and desired humidity levels and more humidifier parameters.


It is super easy to clean, it has a large opening tank that makes it easy to handwash the tank and to remove any build-up inside it with the cleaning brush that comes with it. Cleaning the humidifier is important to ensure that it performs at its maximum efficiency. A remote control comes with it, there is no need to go to the humidifier and change the settings you can easily operate it through the remote. The remote has an operating range of 16.4 ft.


The humidifying timer allows you to set the operating time between 1, 2, 4, or 8 hours after which it switches off automatically. It is also more secure because it shuts down on its own when the water tank is empty. The 360° dual nozzle directs the mist where it is needed, and the water gauge helps in determining when the humidifier needs a refill. All in all, it is a pretty ideal humidifier with a lot of features for grow room.

  • 6.3-gallons water tank.

  • Remote control.

  • 360° dual nozzle.

  • The remote doesn’t come with a battery.


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7. Vornado UH100 Ultrasonic Cool Mist Humidifier

Cool Pick

Vornado UH100 Ultrasonic Cool Mist Humidifier

Auto Humidity Control, Easy View 1 Gallon Water Tank, White

INTELLIGENTLY CONSISTENT COMFORT — Equipped with a built-in humidistat that allows you to set your comfort level and senses how much humidity and circulation is needed to maintain it and makes adjustments automatically.

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The last humidifier on our list is the Vornado UH100 Ultrasonic Cool Mist Humidifier, to control the moisture in the grow room. One of the major features we really like about this humidifier is its ability to evenly distribute moisture up to 600 square feet, ensuring that every plant receives enough moisture to grow beautifully. It comes with a built-in humidistat to set the humidity levels as per your requirement and the SimpleTank system makes the filling and cleaning very easy.


Are you wondering about the gallon capacity? Well, the UH100 has a 1-gallon capacity and gives up to a 2-gallon output for 24 hours. The performance through an output perspective is definitely exemplary. There are 3-fan settings (Auto, Low, and High) allowing you to adjust the humidity levels from 40% to 60%. The humidifier will also automatically shut down once it runs out of water.


It helps to eradicate dry air in the room where your plants are growing, and smoothly humidifies all the air using an innovative pattern called Vortex Action. The airflow created is fast, yet gentle to create a natural and consistent atmosphere ideal for your plants. Another feature that makes it stand out is how it automatically detects the humidity levels and makes adjustments to the moisture circulation needed.


In comparison to other humidifiers, where the mist falls and leaves the floors damp. The fan-assisted feature basically channels the mist into a beam of air and distributes it into the entire room. It is a certified product, safety-tested, and meets the U.S voltage requirements as well. It is definitely a humidifier that will fulfill the needs of your plants and their growth.

  • 3 fan settings.

  • Vortex Action.

  • U.S Certified.

  • Slightly pricey.


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That said, the discusson on best humidifier for grow room ends here. There are plenty of options selected for you in this list to help you make the better decision and we have also mentioned one product as a recommended unit to help you choose the best without any hassle. is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.

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