Best Humidifier for Grow Room Reviews & Buying Guide

Best Quality

taotronics humidifier review-min

TaoTronics TT-AH001 Cool Mist Ultrasonic Humidifiers

  • LED Display
  • 4L Tank Capacity
  • Price Below 50$

Best Price

everlasting comfort ultrasonic review-min

Ultrasonic Cool Mist Humidifier (6L)

  • High Fresh Air Output
  • Quite Running
  • Price Below $50!

It is a constant struggle for growers to keep the humidity at an optimum level that supports the growth and survival of marijuana. Many growers don’t understand the importance of this and have lost most of their plants to low or excess humidity.

Do you know that too little or too much humidity can harm your marijuana? And, do you know that there is a significant difference between the humidity required by marijuana and other plants?

Worry less, as this post will unveil the best humidifiers for grow room, what to look for when purchasing a humidifier and why it is essential to have a humidifier in your grow tent. Nonetheless, you’ll also have general information about humidifiers.


What is a humidifier?

A humidifier is an electronic device used to increase the amount of moisture content in the air. The device is mostly used in offices, hotels, greenhouses, grow tents, and so on.


Types of plant humidifiers

The following are types of humidifiers that you can consider for your grow room;


a) Ultrasonic humidifier

It produces cool mist through vibration at an ultrasonic frequency. It is one of the leaders in the humidifiers used in grow rooms.

Pros: It works with low noise, releases a cool fog, easy to manage, and low cost of maintenance.

Cons: It produces white dust when tap water is used in the unit.


b) Cool mist humidifier

It releases cool mists into the dry air after trapping impurities in the air by using its filters.

Pros: It is easy to clean, efficient in warmer climates, and operates efficiently in large grow rooms.

Cons: It requires high maintenance, it is noisy when in operation, and the filter requires regular changing to prevent mold and algae formation.


c) Warm mist humidifier

It releases warm and soothing mists into the air.

Pros: It creates cleaner mists through evaporation, produces low noise, and it is inexpensive.

Cons: It consumes more electricity, difficult to clean, covers only a small area, and requires frequent cleaning.


d) Evaporative humidifier

It is a type of humidifier that uses airflow to generate vapor or mist into the air.

Pros: Its filters prevent minerals and microorganisms in the water from escaping into the air, and it is inexpensive.

Cons: The filters require frequent changing, and it requires regular cleaning.


e) Air washer humidifier

It’s considered as one of the advanced humidifiers in the market. It operates by adding moisture to the air and cleaning the air by removal of waste particles. It mainly removes pollen particles, dust, and airborne impurities from the air and releases cool mist only.

Pros: It is easy to operate, capable of covering large grow rooms, and produces low noise at the time of operation.

Cons: It requires regular maintenance, and it is affected by water dust


Now that you have an idea about what a humidifier is and the types let’s take a look at the top ten best humidifiers for grow room.

1. TaoTronics TT-AH001 Cool Humidifier

It comes with almost all the significant features that you’ll need for your grow room. It is an ultrasonic humidifier with an air diffusion that produces less than 38dB of sound. With that level of noise, you won’t realize it is there.

The air released by this humidifier is risk-free and odorless. Moreover, you can adjust the amount of vapor released by setting the mist flow and humidity level. It comes with a four-liter tank capable enough to hold the required amount of water; hence, allowing it to work for about 30 hours. Therefore, your grow room has access to pure air throughout the night. With that run-time and size of the tank, it makes it ideal for humidifying a grow room of size 322 square feet – that’s a large grow room. 

Furthermore, it features a sleep mode function and a built-in timer, which allows you to do other things with no worries of the humidifier sleeping on its job. It also comes with a LED display that displays the current RH. By showing the current RH, it allows you to choose between three mist levels which suit your grow room. Furthermore, you can select when the humidifier goes off when the optimum humidity level is achieved. On top of that, it features a 360-degree nozzle which supports steady dissemination of air.

Final Verdict

2. Ideal-air commercial grade humidifier

The Ideal-Air is a very durable humidifier. Besides that, it comes with an industrial grade motor that ensures it can operate for a long time without getting hot. It is a humidifier that you can leave it to work for days without worrying about it malfunctioning.

It functions by taking the harsh dry air in your grow room and releases air with perfect levels of humidity; hence, providing an ideal environment for the healthy growth of your plants. On top of that, its capable of providing high levels of humidity to crops such as mushrooms.

You can connect it to your water supply easily; therefore, eliminating the need for regularly refilling the tank. It gives noise about 62dB which is a bit high for use at home; however, ideal for grow rooms. It weighs fifteen pounds making it light enough to be moved around the grow room.

Final Verdict

3. AIRCARE 831000 Humidifier

If you need for a humidifier that can save your grow room in terms of space, this is the best option by far. In fact, it bears the name space-saver humidifier. It may not have the best design in the market, but it surely will occupy limited space. As a matter of fact, it is one of the ideal humidifiers for medium grow rooms.

Size is not the only thing that it provides, but also excellent features. This model from AIRCARE has a reasonable run-time of more than seventy hours; therefore, meaning your plants can enjoy long hours of clean and ideal humidity. Additionally, it will save you the workload of refilling the tank. 

In its class, it has one of the largest class. It’s because it has the capability of holding up to six gallons of water without having problems such as leaks. On top of that, it features a thick, saturated wick filter and a pad that ensures the air in the grow room is free from germs, airborne particles, and allergens that may cause problems to your plants.

Final Verdict

4. Horticat U80 humidifier

It is an ultrasonic humidifier that will save you from the hassle of refilling the tank. It’s because you can connect the humidifier direct to the water supply line. That’s not enough for this Horticat U80 humidifier since it comes at an affordable price. This makes it stand out as most of the high-quality humidifiers are a bit expensive. 

The humidifier dispenses clean mist air in your grow room and feeds up your plants with humidity of up to eighty pints per day. It does all that without messing the grow room. It produces a low level of noise when operating that you may even fall asleep in inside your grow room. It also comes with a humidistat, which also helps in controlling the humidity level.

It is easy to clean; therefore, you take the shortest time to clean it. With a weight of 15.45 pounds, you can carry it around with ease as well as mount it on the wall easily, and it will continue doing its job efficiently. With this humidifier, you have value for your money as it is a long-lasting gadget that will offer several years of service.

Final Verdict

5. PureGuardian 10 L Warm and Cool Mist Humidifier

It is a small size humidifier compared to the above three humidifiers. However, that does not make it inefficient, as it can hold up to 1.32 gallons of water making it capable of providing up to ninety hours of continuous operation. On top of that, it features long wands which are useful for use in medium-sized grow rooms.

The humidifier produces a low level of noise while dispersing fine warm or cool mist enabling your plants to flourish healthily by getting the cool air they need. On its body, it features silver clean protection that fights off the growth of mold and mildew in your grow room.

Another ideal feature is the smart mist sensor. The sensor functions by adjusting the output from the humidifier to match the ideal humidity level automatically. Furthermore, it comes with electronic control that features digital display options allowing you to see the gadget at night.

Final Verdict

6. Pure Enrichment MistAire Humidifier

It moisturizes your grow room up to sixteen hours safely thanks to the ultrasonic cool mist technology it uses. With such technology, you have an assurance that your plants will enjoy an ideal level of humidity as they grow.

The humidifier comes with high and low-speed settings to allow you to change the speed of the mist as well as the direction. The tank size of this humidifier is 1 ½ liter, which is perfect for covering a medium size grow room. You can also use it for other rooms in your home like the bedrooms.

At night, the humidifier plays another role which is lighting the grow room since it comes with an optional night light that gives a beautiful glow in your grow room. Since it is optional, you can switch it off if you don’t need it. Besides that, it comes with an automatic shut feature that shuts the unit off when the tank dries up. 

You’ll get back value for your money when you purchase this humidifier. It’s because it comes with a one-year warranty and it comes from a reputable brand that offers around the clock customer assistance.

Final Verdict

7. TaoTronics Top Fill Humidifier

It is yet another ultrasonic humidifier from TaoTronics. It comes with a wide top opening that enables you to refill its tank easily as well as clean the mist that settles on the top. Moreover, it comes with a four-liter tank that’s capable of providing up to thirty hours of non-stop operation.

With the size of the tank and run-time, it makes ideal for grow rooms of sizes 430 square feet. It features unique modes that make it possible for you to choose between preset humidity, sleep mode, timer, and other modes.

If you are obsessed with healthy stuff, then it is the best humidifier for your grow room. This is so as it produces healthy mist thanks to the huge ceramic filter and antibacterial coating which take part in cleaning the water.

Final Verdict

8. Ideal-air commercial grade humidifier

The Ideal-Air is a very durable humidifier. Besides that, it comes with an industrial grade motor that ensures it can operate for a long time without getting hot. It is a humidifier that you can leave it to work for days without worrying about it malfunctioning.

It functions by taking the harsh dry air in your grow room and releases air with perfect levels of humidity; hence, providing an ideal environment for the healthy growth of your plants. On top of that, its capable of providing high levels of humidity to crops such as mushrooms.

Final Verdict

9. AIRCARE MA1201 Humidifier

AIRCARE makes it again to the top ten list by this evaporative humidifier. The humidifier is housed in a resplendent white body, and it is a whole house model as it is capable of humidifying a 3600 square feet grow room.

Despite being the biggest humidifier in this list, it is one of the easiest humidifiers to use and lightest to move around the grow room. It’s because it has wheels allowing you to push around easily. 

Besides that, it features a digital humidistat which allows you to carry out multiple activities without your intervention. On top of that, it comes with an automatic shut off feature that shuts the humidifier off when the tank dries up. Moreover, it has a built-in evaporative wick that traps mineral deposits in the tap water.

Final Verdict

10. Everlasting Ultrasonic Humidifier

It comes with a built-in oil-diffuser and a six-liter tank which is capable of releasing high mist output of around 270 ml per hour. With the large tank, it can last up to fifty hours and can cover a grow room of about 400 square feet.

The humidifier produces a low level of noise while working steadily. Moreover, it comes with an inbuilt oil-diffuser and a vaporizer that sprays the oil and releases it into the mist. With this, the grow room air remains pure, clean and with a fresh scent. Besides that, it reduces airborne bacteria and helps to prevent allergies.

Final Verdict

Everything you need to know about grow room Humidfiers

What to look for when purchasing the best humidifier for grow room

Choosing the best humidifier for grow room from the list is one of the main problems that you always have to solve. With all the models and types of humidifiers present in the market, selecting the best humidifier can be intimidating. Worry not, the following tips will guide you to select the best humidifier.


The size of the grow room

Size plays a key role in what type of humidifier you are going to pick. A small grow room will require a small humidifier for it to function efficiently. Below, is an approximation of the type of humidifier and size of the growing room that may work efficiently.

• Grow rooms of size 300 square feet require small humidifiers

• Grow rooms of size 350-500 square feet require medium humidifiers

• Grow rooms of size 500-1000 square feet require large humidifiers


Mineral Dust

The amount of mineral dust released depends on the mineral used for the humidifier. If the mineral used contains too many microorganisms and dust, then it is necessary to use the evaporative humidifiers. It’s because it destroys wastes in the mineral and cleans the water before evaporating. Otherwise, regular humidifiers can be used.


Warm mist humidifier or cool mist humidifier

The type of humidifier you’ll choose depends on the surrounding weather of the grow room. For warm weather, the cool mist humidifier is the best, while for cold weather, the warm mist humidifier is the best.


Manual or automatic system

The decision you make here depends on what functionality best suits you. For instance, if you prefer the automatic system, you may settle for the air washer humidifier and ultrasonic humidifier. It’s because of the offer automated features. If manual is the way you want to go, go for the warm mist, cool mist, or evaporative humidifiers.


Maintenance and cleaning

Keeping your humidifier tidy is an important thing for a humidifier. Always, choose a humidifier that requires less cleaning because it lessens the cost and workload. Nonetheless, ensuring you humidifier always functions properly is equally important.

Picking a humidifier that requires frequent maintenance may be problematic for your work. In this case, the cool mist humidifier and ultrasonic humidifier is the best option for you because they require less maintenance and cleaning.


Level of noise

All the humidifiers make some noise when in operation. Some of them produce more noise which can be very irritating. If loud noise is something that disturbs you, then choose between evaporative and ultrasonic humidifiers. Otherwise, you can go for the warm mist and cool mist humidifiers.



Humidifiers operate based on runtime. The phrase run-time refers to the time taken by the humidifier to exhaust the water in its reservoir or tank when in operation. In the market, you’ll get humidifiers that last more than sixty hours, while others can only endure for about fifteen hours.

The run-time of the humidifier is essential because it dictates the time needed for refilling the water level, which can be strenuous particularly during operations. For instance, a humidifier with fifteen hours’ run-time requires you to refill the tank twice within 24 hours. Therefore, the ideal humidifier is one which has a long run-time as you’ll only need to refill the tank less than two times in a day.


Cost and budget

It cuts across all the equipment required for a grow room. For the humidifier, start by surveying the market. Through this, you will be in a better position of comparing the prices and see which one you can afford. Also, remember that when using a humidifier, you have to bear the cost of maintenance at some point. Therefore, select a humidifier, the needs a low budget.


Why do you need a humidifier for grow room?

It is essential to maintain moisture, and air balance in a grow room for your plants to flourish fast and healthy. For this reason, a humidifier is a must-have electronic appliance in a grow room. That’s not all. The following are more reasons why you need to have a humidifier in your grow room.


Easy to control the grow room humidity

With a humidifier, you can increase the humidity flawlessly. Additionally, a humidifier eliminates the manual steps of increasing humidity such as boiling, which consumes time and requires hard labor.


Helps you to maintain temperature issues

Low or excessive temperature can take a toll over the healthy growth of your plants. The temperature has a direct relation with humidity; therefore, if the humidity is at the right level, then the temperature is also at a required level.


Helps you to control the air balance

Humidity is typically a basic element of the air. It’s because the level of humidity shows the amount of moisture content in the air. Therefore, by using a humidifier to control the moisture level, you’ll also be maintaining a healthy air ratio (air balance) for the grow room air.


It removes the unwanted particles from the air and water

Some of the humidifiers remove airborne impurities, pollen particles, and dust from the air. Others even can destroy harmful substances found in water. Through this, a humidifier ensures the air in your grow room is clean and suitable for the growth of your plants.


Helps to prevent humidity related problems on the plants

Controlling humidity in your grow room by use of a humidifier helps to prevent problems for the plants caused by excessive or low humidity. For instance, fattening of buds caused by powdery mildew and botrytis and stunted growth of the roots are some of the humidity related problems.



Owning the best humidifier for grow room is essential for maintaining the required levels of humidity in your grow room for the healthy growth of your plants. Get one model from the list that suits your needs and enjoy the benefits

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