What Is The Best 4×4 Grow Tent Dehumidifier? Top 3

The best dehumidifier for 4×4 grow tent does not have to be too big because the tent itself is not that big.

Take for example, the VIVOSUN S448 4 by 4 foot tent that you can order on Amazon. It is only 6.6 feet high, giving it a volume of 105.6 cubic feet. As you will see, most small dehumidifiers can work in such a small space.

105 cubic feet of air means that even the best dehumidifier for 2×2 grow tent can work well. There is not that much air to exchange anyway.

But if there is too high humidity outside the tent, you will have to seal it to prevent the humid air from outside coming inside the tent.

To control humidity in a grow tent, do not use an oversized dehumidifier. It can make the air inside the tent too dry and that would affect your plants, especially if they are in the flowering stage.

1. Pro Breeze Electric Mini Dehumidifier


This is an award winning dehumidifier that is largely used in the USA. The Pro Breeze Electric portable humidifier is perfect for a small grow tent because of its features, portability, small footprint and usability.

Besides using this small unit in the grow tent, you could also use it as a desktop unit. Remember not to keep it too close because a dehumidifier usually blows hot air, so it might make your workstation a tad too warm.

This is a small capacity dehumidifier since its tank can hold only 500ML of water. It is enough for such a small growing tent.

Unless you have very high humidity in the growing tent, this dehumidifier ought to be enough in a 4 b 4 tent, or even bigger, say, up to a 6×6 tent.

The dehumidifier consumes little electricity as its consumption has been rated at just $0.07 a day.

Using this small dehumidifier for a bathroom or grow tent gets the job done efficiently and saves money at the same time.

When the tank is full, a red LED light is going to alert you. That is not all because it will also shut down automatically to prevent spilling water to the floor.


  • Award winning and trusted dehumidifier
  • Red LED light shows you when the unit is full
  • Easy to remove the tank and empty it
  •  It is small enough to carry around easily


  • The noise feels a bit loud in small rooms
  • The tank lid feels too tight when you want to remove it to clean the inside

2. VIVOSUN Small Space Mini Dehumidifier


This small capacity dehumidifier displays a red LED light when the tank is full. It will collect about 400ML of water daily, so the 1.3 liter tank will fill up in about three days.

There is no assemblage required for the VIVOSUN mini dehumidifier. Just plug it into the socket and then switch it on. It will start collecting water immediately.

Because of its small size, it has a small footprint, so you can set it on one corner of the grow tent. But remember to set it a bit high off the ground.

Follow the advice in the post on dehumidifier on the floor or up high, to know the best place for your dehumidifier.

It has a space rating of 269 square feet. You can also use it in small rooms, bathrooms and other limited spaces. You could also use it in the closet to prevent high humidity damage for leather items.

You could also use this dehumidifier to control humidity in an incubator. Because of the small size, it fits into the most squeezed of spaces.

You could also use it in your living room, close to your electronics. It can help to prevent humidity damage to the electronics.

It also comes with an integrated handle to transport it easily. The bucket is so simple to remove, empty and put it back.


  • Very effective at lowering the humidity level
  • Bigger and even smaller VIVOSUN dehumidifier models available
  • It is whisper-quiet so you can even use it in baby’s room
  • Internal filter net removes improves the quality of air in the tent


  • The green light on the on/off button won’t go off

3. Pohl Schmitt Electric Dehumidifier for Grow Tent


With a space rating of 225 square feet, the Pohl Schmitt Electric dehumidifier is a good option for people with a 4 by 4 or even slightly bigger grow tent.

This small portable dehumidifier comes with a capacity of 500ML. In such a small grow tent, this is a lot of water and the tank might not even fill up in one day.

When the dehumidifier tank fills up, it is going to shut down automatically. You need not worry about the dehumidifier making the floor damp.

This dehumidifier is not loud, but if you have sensitive ears, you might find the steady hum somewhat irritating.

Its noise level has been rated at 39dB, which is only slightly higher than normal whisper noise level.

The use of this unit is reserved for the small grow tents alone. You could also use it to keep a good humidity level for sleeping.

Also, if you are looking for the best small dehumidifier for a bathroom, this is it. With a power cord that is 4 feet long, you can place it in the most convenient place in small spaces.

This dehumidifier does not give an alert in the form of light or sound when the tank is full. It just shuts down.

If you have the problem of mold in your space, this portable dehumidifier will help to remove the moisture. Remember, when the humidity is high, mold starts to grow.


  • Comes ready to plug-in and use
  • It  is durably built
  • Good for small uses, including desktop
  • Automatic shut off when the tank is full
  • The price is fair enough


  • Does not alert you when the tank is full. It just shuts down
  • The capacity is a bit small

What is the best size dehumidifier for a 4×4 grow tent?

The best size for a dehumidifier that you can use in a 4×4 grow tent is one with a bucket capacity of 400ML a day to 3 liters.

Usually, when you have many plants tucked in a small space, they will cause more humidity when you water them.

You could get a bigger dehumidifier, but that would be considered overkill and it might lower the humidity too much, making the air dry.

However, when you get one with enough capacity, it can run continuously throughout the day and lower the humidity considerably.

The total square area of a 4×4 tent is 16 square feet. That is not too big. However, unless you want to buy a battery operated dehumidifier, most of the electric ones will cover at least 200 square feet.

Such are appropriate!

What size dehumidifier for a 3×3 grow tent?

best dehumidifier for 4x4 grow tent

There is not much difference between a 2×2, 3×3 and 4×4 grow tent. Therefore, all of the dehumidifiers that we have reviewed here can work in this tent.

This also applies to a humidifier for a 2×2 grow tent. It too can increase the humidity level appropriately in a 3×3, 4×4 and even a 5×5 grow tent.

Chances are you will only need to run a dehumidifier a few times a day, immediately after the watering times.

After it has lowered the humidity level appropriately, you can switch it off. If you live in a high humidity place in Florida, you might need to run the dehumidifier more often.

Overall, most small dehumidifiers will work appropriately to lower the humidity in a grow tent. However, go for electric mini dehumidifiers as opposed to silica gel ones.

What should the humidity be in a 4×4 grow tent?

This depends on the growing stage of your plants and the types of plants you are growing there. During the early seedling stages, you will need to maintain a humidity level of 70 to75 percent.

In the middle stage, also called the vegetation stage, you will need to maintain a grow tent humidity level of 50 to 70 percent.

During the flowering stage, the humidity requirement goes down considerably. You should lower it to 40 to 50%.

To know whether you are keeping the right humidity levels in the grow tent, check with a hygrometer or a humidistat.

Conclusion: Best dehumidifier for 4×4 grow tent

When your plants get to the flowering stage, they require less humidity. Too much air moisture can hamper your harvest a great deal.

Based on the square footage of the grow tent, get a slightly bigger one, so that you can use it in the house when you don’t need it in the tent.

The same unit you have been using in the tent can also become the best small dehumidifier for the closet.