Buyer's Guide & Information

Best Dehumidifiers for Grow Rooms

We have reviewed and compared the best dehumidifiers for grow rooms. Get the perfect air in your grow tent with these top brands.

If you are an avid indoor plant growing enthusiast like us, you know the importance of maintaining an ideal grow room or grow tent.

From the ideal temperature to the right level of moisture, many factors influence your plants’ quality. However, grow rooms are moisture-prone areas which can have adverse effects on your produce.

If you’re looking to maintain the right humidity level, invest in a dehumidifier. We have reviewed the best dehumidifiers available on the market – read on to find the right fit for your grow room!

Negative Effects Of High Moisture In Grow Rooms

  • Rotting of the flower rot or bud rot
  • White mold/mildew which obstructs plants from getting water and sunlight
  • Stunted plant growth

A dehumidifier removes the excess moisture from the atmosphere to allow an ideal environment for your indoor plants to grow.

Dehumidifiers for Grow Rooms Compared

Model PPD Area Water Tank Size Price
Honati 1.4 pints per day 269 square feet 0.5 gallons Check Amazon
Vremi 22 pints per day 1500 square feet 0.8 gallons Check Amazon
Dri-EAZ F413  80 pints per day 2000 square feet 17 gallons Check Amazon
Pohl Schmitt Mini 0.62 pints per day < 300 square feet 0.13 gallons Check Amazon
Eva-Dry E-500 0.5 pints per day 62 square feet 0.06 gallons Check Amazon
Inofia 30 pints per day 1056 square feet 0.5 gallons Check Amazon
SEAVON 0.5 pints per day 195 square feet 0.12 gallons Check Amazon

Buying The Right Dehumidifier For Your Grow Room

Temperature Requirements

Various types of plants and grow rooms require different room temperatures to flourish; the same is the case with growing cycles.

Additionally, your local climate also significantly influences the humidity level of your grow room experiences. When buying a dehumidifier, pick one that aligns with your temperature requirements.

For instance, if your city experiences high temperatures, you may require a more powerful dehumidifier.

Water Tank Capacity

Some of the top industrial-grade dehumidifiers for grow rooms have a moisture removal capacity of about 20-40 oz. per day, whereas the smaller units can have a removal capacity of around 8-12 oz.

The higher your dehumidifying requirements, the larger your water tank capacity should be.

Coverage Area

How big is your grow room? This is an important consideration when buying the right dehumidifier.

If you have a larger space, buying a dehumidifier that cannot cover the area will lead to inadequate performance. This, in turn, can lead to moisture adversely impacting your plants.

Drainage & Ducting

Some dehumidifiers just have the buckets that need to be emptied regularly and manually. On the other hand, some other dehumidifiers allow you to connect the drain hose with the bucket to empty the tank into the floor drain. While in other cases, you may need the condensate pump to remove the water.

You have to ascertain the right fit for your company.

Another important consideration when buying dehumidifiers is ducting. Ducting allows for improved dry air distribution, which can be spread across a wider area than dehumidifiers that are not ducted.

With plants requiring fresh air, ducted dehumidifiers make for the best choice for grow rooms.

Other Features
  • Filter indicator light: it shows you the water tank requires emptying and cleaning
  • Auto-humidistat: senses the water level in the air in a room and shuts off automatically when preferred humidity is achieved.
  • Auto shut-off: it turns the dehumidifier off once the water tank capacity is full
  • Lower Temperature setting: allows dehumidifiers to operate, even in lower temperatures.
  • Frost sensor: carefully monitors the unit’s coil temperature and indoor humidity levels to avoid icing
  • Digital/Electronic controls: it allows you to set desired humidity levels
  • Noise level: noise which fan speed and compressors make during operation
  • Warranty: All dehumidifiers for grow rooms can have different warranty periods ranging from 1 year to 5 years

The dehumidifiers’ price is based on the model, features, capacity, and size you choose.

For instance, if you want a dehumidifier for a small space, it can cost you as low as $19. However, if you intend to cultivate indoor plants on a larger scale, the cost can go up to $2000 with advanced features.

Whatever the size of your grow room is, we recommend going for value and not the price tag.

7 Best Dehumidifiers For Grow Rooms Reviewed

1. Honati Dehumidifier

Our Top Pick
Moisture Removal 1.4 pints per day
Coverage 269 square feet
Water Tank Capacity 0.5 gallons
Weight 5.59lb
Dimensions 8.98 x 5.9 x 14.65 inches

Suppose you’re planning to cultivate over 10 plants in one big room and are searching for an ideal dehumidifier to cater to them. In that case, the Honati dehumidifier fits the bill.

With an impressive 2000ml capacity, it can easily remove 750ml moisture per day from any space of about 269 sq. ft. This dehumidifier is a far better option for medium/large grow tents; however, smaller ones are better off with a smaller model.

The advanced technology and no compressor make the unit ultra-quiet during operations. You won’t experience any sound as the noise is less than 39 decibel, which means you, along with your plants, can enjoy a quiet environment.

This is one of the main reasons we’ve reviewed the Honati dehumidifier as our top pick and termed it the best dehumidifier for indoor growth.

Besides that, it protects the room from developing microbiological contamination such as fungi, protozoa, bacteria, prions, and mold, which can affect your grow tent adversely.

Additionally, you don’t have to monitor the unit continuously. It comes with an embedded auto-shutoff system that prevents water overflow by switching it off once the tank gets full.

On top of everything, we liked the fact that this is an energy-saving dehumidifier that can provide a moisture-free grow room with low-energy consumption.


  • Perfect for medium/large grow tents
  • Ultra Quiet operation
  • Portable
  • Big tank size


  • Fewer functions
  • Low moisture removal capacity

2. Vremi Energy Star Dehumidifier

 Best Dehumidifier for Large Grow Rooms
Moisture Removal 22 pints per day
Coverage 1500 square feet
Water Tank Capacity 0.8 gallons
Weight 33.1lbs
Dimensions 16.1 x 10.4 x 19.9 inches

Do you want to cultivate various plants inside your grow room? If yes, the Vermi dehumidifier makes for a perfect choice.

With a capacity to cover a space of about 1500 sq. ft. and remove 22 pints of the moisture from the air in a day, this is undeniably the best dehumidifier for large grow rooms with about 50 plants.

Plus, you won’t have to bear the brunt of costly utility bills as it’s an Energy Star approved dehumidifier that can remove excess humidity from the air with low energy consumption.

What we particularly liked about this Vermi dehumidifier model is that it’s quite simple to use. Just set the preferred moisture setting that you want for your plants and leave it there. Your grow room will benefit from dry air until the water tank capacity is reached!

Further, its turbo mode provides a boost to the fan speed to ensure optimum moisture removal.

With a built-in shut off feature, this dehumidifier automatically turns it off when the water tank fills. The drain hose of the Vermi dehumidifier allows it to drain continuously without threatening to ruin your grow room with overflowing.


  • Perfect for medium/large grow tents
  • Highly efficient and portable
  • Energy Star qualified
  • Auto-shutoff


  • Slight noisy
  • Small water tank space (needs continuous emptying)

3. Dri-EAZ F413 Revolution LGR Compact Dehumidifier

Best for Commercial Grows
Moisture Removal 80 pints per day
Coverage 1500-2000 square feet
Water Tank Capacity 17 gallons
Weight 65lbs
Dimensions 12.5 x 21.5 x 12.5 inches

If you’re looking for a dehumidifier for your commercial grow room that can last and delivers power-packed performance, look no further than the Dri-EAZ F413 Revolution LGR dehumidifier.

With the moisture removal capacity of about 80 pints per day in an AHAM condition and 139 pints under the saturated conditions, this dehumidifier is hands down best for commercial grows covering an area of about 1500-2000 sq. ft.

It has an automatic humidistat giving you the power to set, control, and manage the required humidity levels at any time, ensuring your commercial grows to dry whenever needed. Plus, it can run nonstop for 24 hours.

Moreover, this Dri-EAZ compact dehumidifier comes with a digital panel that displays relative humidity, outlet and inlet temperatures, and track working hours. Not only that, but it also includes an impressive purge control feature to condensate the pump from the dehumidifier.

The high airflow filter (HAF) of this dehumidifier does a wonderful job of resisting microbial growth such as fungi, mold, and other bacteria in the grow room. Besides that, it also captures harmful airborne particles and makes sure your grow tent has optimum airflow during operation.


  • Compact yet powerful
  • Simple to use
  • Energy Star approved
  • High Airflow filter


  • Slightly expensive
  • Frequent leaks when the hose isn’t appropriately connected

4. Pohl Schmitt Mini Dehumidifier

 Best Dehumidifier for a Small Grow Room
Moisture Removal 0.62 pints per day
Coverage less than 300 square feet
Water Tank Capacity 0.13 gallon
Weight 2.7lbs
Dimensions 11.18 x 6.38 x 5.24 inches

Are you seeking a compact dehumidifier for your small grow room? If so, your search stops with Pohl Schmitt mini dehumidifier.

Many homeowners have called this little unit the best dehumidifier for a small grow room due to its efficiency and small size.

Despite the compact size, it’s highly effective at doing its job. Equipped with a 500ml water tank and a moisture removal capacity of about 10 ounces per day, this mini dehumidifier can efficiently keep mildew, dust mites, and mold at bay. This allows for a bacteria-free space.

Plus, it can operate at a reasonably low sound, thanks to the Peltier technology it is equipped with. You can also move it anywhere you want in the grow tent to better ensure plants’ desired humidity levels.

Moreover, this mini dehumidifier from Pohl Schmitt doesn’t carry any toxic substances that can harm your plants.

On top of everything else, it provides an environment with proper humidity so your grow tent, and you can breathe safe and well.


  • Highly portable
  • Eco-friendly and energy saving
  • Convenient to use
  • Quiet and lightweight


  • Tank gets full relatively quick (due to small size)
  • Available in only one color

5. Eva-Dry E-500

 Best Dehumidifier for a Small Grow Room
Moisture Removal 0.5 pints per day
Coverage 62 square feet
Water Tank Capacity 0.06 gallon
Weight 1.8lbs
Dimensions 5.5 x 2.5 x 5.5 inches

If you’re looking for the best cheap dehumidifier for grow room with an uncompromising emphasis on efficiency and performance, the Eva-Dry mini dehumidifier is the best fit.

Perfect for a 2×2 indoor grow tent, this mini model provides protection up to 62 sq. ft. with a moisture removal capacity of about 8 oz. Due to this reason, we’ve reviewed Eva-Dry as the best dehumidifier for a 2×2 grow tent as well.

With this dehumidifier, you won’t have to face frequent water spills and leakages. That’s because the unit is designed with harmless silica gel that effectively takes out the indoor moisture without any sort of spills and leaks.

What’s more – this model has a color-changing feature that informs you about the humidity level absorption from time to time. It turns green from orange when the tank fills.

What we particularly liked about this device is that it’s 100% cordless. You don’t need batteries and cables to use and recharge; in fact, all you need to do is plug the unit with your wall mount power strip.

Lastly, its sleek and compact design makes it a perfect 2×2 grow tent dehumidifier as you can move it anywhere in the grow room to combat the humidity.


  • Extremely low power consumption
  • Quiet operation
  • Affordable
  • 10-year life expectancy


  • Unsuitable for large grow rooms
  • Low moisture removal capacity

6. Inofia Dehumidifier

 Best Dehumidifier for a Small Grow Room
Moisture Removal 30 pints per day
Coverage 1056 square feet
Water Tank Capacity 0.5 gallon
Weight 24.9lbs
Dimensions 12.2 x 8.2 x 17.3 inches

With an incredible 4 gallons per day dehumidifying capacity and coverage of about 1056 sq. ft., the Inofia dehumidifier is the best dehumidifier for a 10×10 grow tent.

It’s quite easy to use. You have to start the dehumidifier, and it automatically stops once the required levels of humidity have met with the help of an embedded humidistat. What’s more – it observes the humidity is increasing again and auto-restarts itself, saving you adequate time and effort.

Thanks to the automatic 24/7 on/off switch system, you don’t have to worry about excessive utility bills. Also, the adjustable fan speed of the dehumidifier adds an added flexibility. Not to mention, the unit is reasonably quiet, with maximum noise levels up to 46 decibels.

Its digital display allows you to set humidity levels with just one click. Plus, if you want to see the current humidity level of a grow tent, it can show you that as well. This digital panel features buttons to adjust fan speed, protection alarm (when the tank fills), set desired humidity levels, auto-defrost, and timer button.

With sufficient coverage, this dehumidifier makes for a great addition to smaller 4×8 and 5x5grow rooms as well.


  • Easy to operate
  • Includes both manual and auto drainage
  • High water tank capacity
  • Auto defrost


  • Complex installation process
  • The air filter isn’t easy to clean

7. SEAVON Dehumidifier

 Best Dehumidifier for a Small Grow Room
Moisture Removal 0.5 pints per day
Coverage 195 square feet
Water Tank Capacity 0.12 gallon
Weight 2.4lbs
Dimensions 7.2 x 6.2 x 11 inches

The SEAVON dehumidifier is a compact unit with a 500ml tank capacity and boasts a moisture removal capacity of about 250ml per day in an area of 195 sq. ft. It was one of the best dehumidifiers for a small grow room that we came across in our review.

This dehumidifier is highly portable and saves adequate space. It’s extremely compact size make it a perfect small grow tent dehumidifier, which is why we’ve reviewed SEAVON as the best dehumidifier for a 4×4 grow tent.

For optimum moisture removal, you can place the unit anywhere you deem fit for your indoor plants.

It has an auto shut-off feature that turns off the device automatically when it gets filled up. When you see the red light lit up, it means the tank needs emptying. All you’ve got to do is remove the tank, drain the water, and put the 4×4 grow tent dehumidifier’s water tank back to the original place.

We particularly liked this SEAVON compact dehumidifier because it’s highly efficient and ultra-quiet during operation. Thanks to its embedded thermoelectric coolers with no compressor at all, it ensures a noiseless operation.

It is an eco-friendly and low energy consumption device that comes at an affordable price tag to round it off.


  • Auto-shutoff operation
  • Easy to use
  • Highly efficient and ultra-quiet
  • Extremely portable


  • Won’t work under 41oF temperature
  • Low-moisture removal capacity (250ml/day)

Calculating Dehumidifier Size For Grow Rooms

Getting the right sized dehumidifier for the grow room is the first step towards successful indoor gardening.

Though several factors are involved, the dehumidifier’s size largely depends on the grow room/tent, number of plants, amount of water you provide to each plant daily, runoff percentage, and HVAC system.

Dehumidifier for 2×2 grow tent

For a small 2×2 grow tent, the 30-pint dehumidifier is perfect as it can easily cover an area of about 250 sq ft. We recommend Eva Dry E-500 since it specially caters to small areas of about 62 sq ft.

Dehumidifier for 3×3 grow tent

The 3×3 grow room is also a small grow area. Like the 2×2, the 30-pint dehumidifier fits the bill perfectly due to its moisture removal capacity of 20ounces. We recommend our top pick, Honati dehumidifier for 3×3 grow tent because of its impressive coverage of about 269 sq ft.

Dehumidifier for 4×4 grow tent

For 4×4 grow tent, the 40-pint dehumidifier is an ideal choice since it can remove 250ml moisture from the indoor grow room. We recommend the SEAVON dehumidifier due to its capacity to cover an area up to 200 sq ft with a moisture removal capacity of about 250ml.

Dehumidifier for 5×5 grow tent

The 40-pint (or above) dehumidifier is a perfect option for a 5×5 grow tent. We recommend the Dri-EAZ F413 dehumidifier as it has excellent coverage of about 1500-2000 sq ft.

Dehumidifier for 10×10 grow tent

As the name suggests, the 10×10 grow tent is hands down a large grow area. We recommend Inofia as it provides 4 gallons of dehumidifying capacity and coverage of about 1056 sq ft.

Additional Tips To Maintain Grow Room Humidity

To maintain grow room humidity, you need to pick the right size dehumidifier based on the room’s size and the number of plants. Some other useful tips include:

  • Get rid of still water: it adds more moisture to the grow room than you could imagine
  • Think of lights: the temperature of the grow room drops the moment you turn off the lights. As a result, the relative humidity increases.

However, if the grow room faces too much dryness, consider using a humidifier since it is the most useful way to maintain or increase your room’s humidity levels.

People Also Ask (FAQ)

What’s The Best Humidity Setting For A Grow Room?

The best humidity setting for a grow room during daytime (lights are turned on) ranges from 70-78 degrees F°. In contrast, during the night, the relative humidity should be around 40%.

How Much Will It Cost To Run A Grow Room Dehumidifier Continuously?

On average, a dehumidifier for a grow room can cost you around 4.2 cents each hour. Suppose you run the dehumidifier continuously for 24 hours. In that case, it can cost you about a dollar putting the annual cost around the $365 range.

Where Should I Place A Dehumidifier In A Grow Room?

If you’ve got a large grow room, the best place is the center of the room – next to or above the lights. However, if the ceiling is low and you can’t hang the dehumidifier, consider placing it under the table or any other floor placement.

Can I Make A DIY Dehumidifier For A Grow Tent?

Yes, you can. All you’ve got to do is drill some holes (about 6-7 to be exact) in your bucket. Now, place the bucket inside another bucket and put around 6lbs. of de-icing rock salt in it. Place it in the grow room and watch the excessive moisture fade away.

Where Is A Good Place To Buy Grow Tent/Grow Room Dehumidifiers?

You can buy a good dehumidifier for the grow room from any electronic store in your neighborhood. However, if you’re looking for some best deals or cheap dehumidifiers for grow tent, look at online stores like Amazon, Home Depot, Lowes, etc.


There you have it! The seven best dehumidifiers for grow room popular among indoor gardeners. Each of the dehumidifiers we’ve reviewed includes amazing features.

However, the Honati dehumidifier tops the list due to its powerful performance and ability to cater to a larger space efficiently.

Josh M