Best Humidifiers for A Small Grow Tent

If you have a 4 square foot tent, you will need a perfectly sized humidifier for your plants. This is why you are looking for the best humidifier for 2 x 2 grow tent.

In such a small space, you can grow one, two or three plants. Therefore, if you use an oversized humidifier, you are going to increase the humidity in the grow tent too much. This can cause root rot and other illnesses.

Besides, there is not all that space to know where to place the humidifier for plants. So what are the top humidifiers for a small 2 feet by 2 feet grow tent?

Keep reading!

Levoit 2.4 Liter humidifier for Grow Tent

best humidifier for 2x2 grow tent


Levoit is one of the most renowned brand names for portable humidifiers in the American market.

It gives great value for money thanks to its sturdy construction, low energy consumption, the whisper quiet operation and great looks.

Even though there are some problems with the Levoit humidifier not working correctly, it is easy to troubleshoot.

This one comes with a 2.4-liter tank, so even in the driest months of the year, it can run nonstop for 24 hours, perhaps even slightly more.

When the tank gets almost empty, with a little water remaining, the humidifier shuts down automatically.

Besides, the transparent tank enables you to see how much water is remaining, so that you can refill it when necessary.

The humidifier has a rotating nozzle that you can turn to face any direction. Thus, you can set the humidifier in one corner of the tent and turn the nozzle in the direction of the plants.

The mist height is 60CM! That is high. Therefore, you can get the size of your plants and then know how far off the floor you will place the humidifier.


  • Consumes minimal energy at slightly more than 10 cents a day
  • 21dB noise level is very low
  • Has a soft night light, which is vital when using humidifier in the bedroom
  • Comes with cleaning tools
  • Space rating of 290 square feet


  • Albeit low, the noise creates a consistent hum that may irritate some people
  • You cannot use tap water in the unit as it will leave humidifier white dust

Pure Enrichment MistAire Ultrasonic Cool Mist Humidifier

Pure Enrichment MistAire Humidifier


Americans use the Pure Enrichment MistAire Ultrasonic Cool Mist Humidifier in their homes to help with dry air. You can use it to help with dry air in your tent.

It comes with outstanding features and functions. Some of them include the 360-degree rotating nozzle. You can get the humidity spread out evenly inside the grow tent.

With a space rating of 250 square feet, when you are not using the humidifier in the small grow tent, you can use it in the bedroom to avoid the symptoms of sleeping in a dry room.

The humidifier has three mist speed settings. These are low, medium, and high. Besides, the small capacity tank of 1.5 liters can pump the mist for up to 25 hours on low speed setting.

The humidifier shuts down automatically when the tank runs empty. There is another benefit that you can enjoy from this unit. It creates a very fine mist that does not get to fall onto the floor and make it wet. It floats in the air, increasing the humidity level appropriately.

If you will use the portable humidifier for sinus relief in your bedroom, the soft night light will help you sleep easily.


  • Comes with a 5-year warranty – register the product online
  • Straight-forward setup and use
  • Speed setting for mist and rotating nozzle
  • Easy fill small tank
  • Energy star rated for its efficiency


  • No proper light setting for people who love to sleep in total darkness
  • Sometimes, the cap gets stuck

Honeywell Top Fill Tower Humidifier

Honeywell Top Fill Tower Humidifier


This is one of the best looking humidifiers in the market, thanks to its tower design. We also think it is the best humidifier for a 2 x 2 grow tent, thanks to its space saving design. If you put it in one corner of the small tent, it will stay out of your way.

The narrow design also makes this a perfect portable humidifier for office, small bedrooms and other spaces. You can use it in your baby nursery when you are not using it in the growing tent.

This unit has a programmable humidistat. What this means is that you can enter the humidity settings. That way, if the air becomes too dry, the humidifier will start automatically.

Mostly, the portable humidifier manufacturers avoid adding this function, but not Honeywell humidifiers.

It also has a 12-hour timer, which means you can set the unit to start adding moisture to your air in 12 hours time.

This is not a filterless humidifier, so it will be releasing filtered, pure mist into your indoor air. While this means you have to clean and/or replace the filters, it is a small price to pay for the purest mist.


  • Humidistat ensures the humidifier runs only when humidity is low
  • Tower design ensures less space use on the floor
  • It works with many filters, even some not from the Honeywell brand name
  • Good Honeywell humidifier instructions
  • Top fill design


  • It is hard to clean the base
  • Filter replacement is costly because you need to replace once a month

Best humidifier for 2 x 2 grow tent FAQ

Will any humidifier be good for your small 2 feet by 2 feet tent? Apparently not! In this section, we shall look at the frequently asked questions and their answers.

What is the best humidifier for a grow tent?

The best humidifier for a grow tent must fulfill the following things:

Space rating – If you have a 2 by 2 grow tent, you do not need a humidifier with a high space rating. In fact, even a battery powered humidifier can work just okay for you.

However, since you can move a portable humidifier from room to room, just get one with about 200 to 300 square feet space rating. That way, you can maintain a good humidity level in the bedroom, in the living room and any other room.

A humidistat would be good – Okay, not many portable humidifiers come with a humidistat but there are several. A humidistat ensures that a humidifier only runs when the air is dry. As long as the tank has water, this unit is going to work without your interference.

Good runtime – For such a small tent, a humidifier with a 1.5 to 4-liter tank size would be appropriate since it can give you a continuous runtime of 24 to 48 hours non-stop. Of course, this depends on the mist speed setting.

Convenient functions – These include things like low noise level, night light, filters and others. The more of these a humidifier has the better it is.

Cool or warm mist humidifier for a grow tent?

It is best to get a cool mist humidifier. There are a few reasons for suggesting this!

First, the tent space of 2 by 2 is quite small. Therefore, pumping warm mist into such a small space is going to make the air feel hotter for your plants.

Secondly, there is already enough heat from the light you have installed in the grow tent. Using a warm mist humidifier will make the air pretty hot faster.

In some instances, some plants require high humidity and would benefit more from a cool mist unit, and vice versa.

Make sure there is enough ventilation in the tent to allow airflow. That way, there will be no condensation on the walls of the tent.

Too much humidity can cause mold growth in the tent or inside your home.

Do I need a humidifier for a grow tent?

A humidifier can help to control humidity in an incubator, in a grow tent, in the closet, in the bedroom and practically everywhere else indoors.

If you expose your indoor plants to dry air, they are going to start losing their natural moisture to the surroundings. This affects their health and can stunt their growth.

Humidifiers are very important in your growing tent. You can use it to regulate the climate for your plants. To do this appropriately, find out what sort of climate is recommended for your indoor plants.

For instance, The says that the beautiful zebra plant requires a humidity level of 60 to 70 percent to thrive. Anything lower than that ruins it.

Conclusion and Recommendation

All of the humidifiers that we have looked at here are great for maintaining the humidity in your 2 by 2 feet grow tent.

However, we would recommend the Honeywell Tower design humidifier because it has a humidistat. In the article on humidistat vs hygrometer, we said that a humidistat senses the humidity level.

In this case, the Honeywell Topfill Tower humidifier will turn on automatically when the air is too dry. Again, it will turn off automatically when the air moisture level is enough.

If you have budget constraints though, go for the cheaper Levoit humidifier.