Best Humidifier for Grow Tent – 2021 Reviews

Are you using a tent to grow your plants? Then, you understand so well how challenging it is to control the humidity. The need of humidity varies depending on the type of plants as well as their stages of growth.

Do you know that the wrong levels of humidity can kill your plants? A lot of growers sort it out by using humidifiers. It is also important to install the most suitable one for your grow tent.

You might not know which brand to choose yet. In this article, I am going to review the top 5 grow tent humidifiers on the market today. Besides that, I am going to share my opinions on vital factors that you should notice before buying a humidifier for your grow tent.

The Grow Tent Humidifier on the Market 2021

You might be confused by so many models of humidifiers on the market. After doing several kinds of research, I have picked the 5 best humidifiers for a grow tent that you shouldn’t miss.

Taotronics Cool Mist Humidifier 

In my opinion, Home Labs is the best humidifier especially if you have a grow tent sized 107-322 ft². This machine is terrific! It is well designed and very friendly to users.

It features a 4L water tank which, at full level, can keeps the humidifier running for 20 to 30 hours. Once the water runs out, the device will automatically shut off. The  micro- porous cartridge can ensure the water free from micro-organisms and bad odors.

They design a built-in humidistat to show you the current RH. You can pick the mist level you wish. Bear in mind that 40%-60% is the best! This humidifier is very quiet.

They suggest users change the filter every 4-6 months. It is super convenient for you to clean or refill water to the tank thanks to the built-in handle.



  • Friendly to users
  • Very quiet
  • Auto shut off
  • Easy and safe to use
  • Remove micro-organisms and bad odors
  • Well-designed
  • A built-in humidistat to watch Rh


  • It might leak a bit when you refill the tank

AIRCARE 831000 Humidifier 

Aircare 831000 is the best space saver. If your grow tent is not too big, I definitely recommend you go for this.

Not a lot of space is needed. This humidifier has wheels which makes it very easy to convey around.

In reality, this humidifier can work best for a medium room which counts up to 2700 sq. ft. The maximum run time is 70 hours. It means that you don’t have to worry about your plants not having enough or too much humidity.

It has 3 levels of fan speed setting: low, medium and high. On the low speed, the fan runs very quietly. You don’t really notice it. This humidifier features the automatic shut-off function. It will turn off either when the expected humidity level is reached or when the unit is empty.


  • Long run time, up to 70 hours
  • Quiet
  • Auto shut-off system
  • Space saver
  • Large tank
  • Easy to move and assemble


  • This product can expose you to chemicals including benzene (mentioned by the manufacturer)

Honeywell HCM 350W Humidifier 

Let me tell you that Honeywell has been on the humidifier market for more than 100 years. How experienced!

Honeywell HCM 350W can add cool moisture to dry air. On low fan speed, this humidifier can run in 24 hours with one – gallon tank. Apart from this, they use advanced evaporative technology which makes sure that your plants can get what needed.

You can refill, clean and replace the water to the tank effortlessly thanks to the wide tank opening. Do not forget to maintain the device. It is suggested to clean every 21 to 28 days depending on the cleanliness of that water you use at the beginning.

The amazing point of this humidifier is the self-regulating system. It automatically manages the moisture output and offers as much humidity as possible.


  • Advanced evaporative technology
  • Easy to refill, clean and replace
  • Self-regulating system
  • Cool moisture added to dry air


  • No auto shut-off  function

Pure Enrichment MistAire Ultrasonic Cool Mist Humidifier

I am sure you may not regret purchasing the Pure Enrichment MistAire Cool Mist humidifier. It is very reasonable, yet works great and efficient. It can moisturize the air up to 16 hours continuously.

This appliance has a tremendous 360 degree nozzle which may direct the flow of mist toward the areas that require moisturizing and faraway from the places that do not need.

It is super quiet. You’ll barely hear the noise of it running. The automated shut-off system works very well. The humidifier will close up when the water level is low or when the storage tank is not there.

The fact of getting no separate filters makes this device very easy to wash. They include a speed modifier so you can set what quantity moist you wish your grow tent to own.


  • 360 degree nozzle
  • Super quiet
  • Reasonable price
  • Automatic shut- off
  • Easy to wash
  • Speed modifier included


  • Should refill often

Levoit Cool Mist Humidifier 

If you are looking for a long operation humidifier, then Levoit Cool Mist is a right choice for you. It can run up to 40 hours. This brand also offers bigger capacity humidifier, in case you have a larger grow tent.

You can control 3 different levels of mist (shown through colors: blue, yellow, purple) by one touch. The key safety feature is the automated shut-off function. The power turns off whenever you take the water tank out of the base or when the tank is empty.

The wide water tank opening makes it a lot easier to refill and clean. You shouldn’t drop any water to the air vent when cleaning.

This humidifier is outstanding for its aromatherapy. It can provide both aroma and mist to your grow tent.


  • Long operation time
  • Easy and safe to use
  • One touch control
  • Auto shut off  function
  • Good price


  • Pure essential oils are not included

Factors you should think through when buying a humidifier for your grow tent 

Tent size

The first and foremost thing that you simply should consider is how big your grow tent is. If it is big, you should absolutely go for an oversized appliance that can absorb moister. Aforementioned writing, I reviewed a few sorts of humidifiers which may work for various grow tent sizes. Pick the foremost appropriate one so that your plants can get the most effective results.


There are such a lot of brands on the market today. All rely on your preferences and wishes. The two most common kinds of humidifiers are the cool mist and also the warm mist. Basically, their functions don’t seem to be different, but the costs and features vary.

The running time of a humidifier is diverse too. Some can endure16 hours, some can work well for 24 hours, etc. Only you recognize what meets your needs the best.


Regarding prices, it is not fair to mention “you get what you pay for” all the time. Sometimes, you pay lots for a humidifier, and then it does not work as expected. Or in some cases, you don’t pay an excessive amount of for it, but it cost you more money for maintenance. In my opinion, you should get what costs you not much time or money to take care of.

Cleaning and maintenance 

I get how annoying it is if it takes you a lot of time to clean a humidifier. If your device is not cleaned well, it might harm your plants. And if you do not keep your appliance clean, it will get a higher chance to break down. It is better to choose the humidifier that you can clean easily.


Q: What humidity should my grow tent be?

Your grow tent’s temperature should not be higher than 31˚C and lower than 17˚C.  The ideal temperature is from 20 to 28 ˚C. The approximate humidity should not exceed 75% and be lower than 20%.  The ideal number is from 40 to 60 %.

Q: Should I put a humidifier in my grow tent?

To control the moisture level and ensure the clean air in your grow tent, you should put a humidifier. Too high or too low humidity levels can damage your plants.

Q: What is growing in my humidifier?

Tap water consists of minerals that can bring deposits in your humidifiers. This will develop bacterial growth. Once the water is realized in the atmosphere, the minerals might leave white dust on your appliances.

Q: Where should a humidifier be placed on the plant?

You should not place it too near or opposite your plants. They design fans to rotate and release moisture.


It is necessary to urge the most effective humidifier for grow tent so your plants can grow during a right environment. I would pick the appliance which meets my requirements and fits my budget. I hope this sharing is useful to you. In the end, you have to decide what fits you the most. Good luck!