Top 5 dehumidifiers for grow tent in 2021 – Cultivate now

Last updated on: September 1, 2021.

Grow fresh marijuana at home.

Are you tired of buying stale vegetables, fruits, and medicinal marijuana from unreliable vendors?
Of course, nothing in the world tastes better than fresh home-grown produce. Growing edible and medicinal plants at home is an amazing, fulfilling experience. It takes your health and wellness to a whole different level.

But don’t be worried if you have insufficient outdoor space, incompatible soil, or climatic conditions.
Today anyone can grow plants anywhere.

It doesn’t matter if you have insufficient outdoor space or soil, or if you are a novice. Irrespective of the season or climatic condition, anyone can enjoy an excellent, perpetual harvest.

All you need is a handy grow tent/grow room.

A grow room is a tall tent-like structure, with reflective interior walls. It is lightproof, waterproof, and so compact that it can easily fit even into a closet. Grow rooms give you the flexibility to use hydroponics, aeroponics, and other latest techniques for maximum yield.

You can set your marijuana plants here along with a grow light, fan, and any other amenities you’ll need.

Beat your cultivation nightmares

The humidity level in the air plays a critical role in the survival and growth of plants in grow tents. Cultivation nightmares begin to grow room owners when the moisture levels increase beyond 70% RH. It is painful to see marijuana and other plants wilt and die due to increased moisture levels.

Another major nightmare for marijuana growers is bud rot, mold and mildew growth, the spread of bacterial and fungal infection, and pest infestation.

These problems increase the incidents of diseases in the marijuana crops, decrease your chances of high yields, and threatens the basic survival of the plants.

To beat these cultivation nightmares, you need to take immediate steps to reduce the humidity level in your grow tent. High humidity is extremely dangerous for the growth of marijuana.

Best dehumidifier for grow tent for home

How can you reduce and optimize moisture levels in your grow room?

It’s quite simple. Just install the best dehumidifier for grow tent.

A dehumidifier is the most reliable appliance to remove excess moisture from the air every single day. You will surely see your marijuana thrive, once you install the best dehumidifier.

Why do we need a dehumidifier for grow tent?

Regulating humidity is a tricky affair for marijuana growers. Whenever plants breathe, perspire, transpire, or get watered, the humidity level fluctuates drastically.

When the grow room humidity is high, the marijuana plants use their leaves to absorb moisture from the air. This process makes them consume less water through their roots. On the other hand, when the moisture in the air is low, they will pull more water in through their roots.

It is a well-known fact that water provides most of the vital nutrients to plants. Since the moisture content in the air influences the water intake, it directly affects nutrient absorption to a great level.

Further, high humidity causes marijuana plants’ buds to rot and develop powdery mildew and mold in the roots, stems, and leaves. Thus your marijuana crop gets totally wasted as it gets close to harvest.

Controlling or optimizing moisture levels play a critical role in maintaining the health of marijuana plants.
That’s why expert cultivators deploy the best grow tent dehumidifiers for humidity control.

One of the key challenges growers face is finding the right size dehumidifier. Grow room dimension generally ranges from small grow tent size such as 2×2, 3×3, 4×4, to larger ones with 5×5 size. Though in certain cases, they demand a greater height, making the size 4×8.

The key to the best moisture removal lies in choosing the best dehumidifier for grow tent. Don’t make the mistake of using the home dehumidifying unit you already own. Make sure that the dehumidifier you use is specifically designed for grow rooms.

The unit can be a silica gel canister dehumidifier or a thermo-electric or a compressor dehumidifier. The silica gel canister dehumidifier falls under the desiccant category which is quite economical and efficient in colder temperatures.

Not sure which one is the best dehumidifier for grow tent?

Check out our top 5 best dehumidifier reviews for grow tent.

5 Best Dehumidifiers For Grow Tent (September 2021)

Based on our extensive experience in the field of dehumidifiers, here is our review of the best dehumidifier for grow tent. We have narrowed down the top 5 best dehumidifiers for grow areas based on significant parameters such as pint capacity per day, cost energy star rating, sq ft coverage area, water reservoir capacity, drainage mode, noise levels, portability, compactness, and automatic features such as auto shut off, auto defrost, and auto restart.

Ready to dive in and figure out which is the best dehumidifier for grow room?

Here you go.

Image PRODUCT/ Features Rating  
Our Top Pickvremi-350x350 (1) Vremi DehumidifierSize: 16.1 x 10.4 x 19.9 inches
Weight: 33.1 lbs.
Additional Features: Turbo Mode, Continuous Drain, Quick
9.6
Runner UpInofia 30 Pint Inofia 30 Pint DehumidifierSize: 8.3 x 12.2 x 17.3 inches
Weight: 23.8 lbs.
Additional Features: Memory Feature, Auto Defrost, Digital Display
9.3
Budget Pickprobreeze-350x350-1 Pro Breeze Electric Mini DehumidifierSize: 6.6 x 9 x 12.69 inches
Weight: 5.08 lbs.
Additional Features: Large Water Tank, Portable
9.1
ivation-mid Ivation Mid Size DehumidifierSize: 9.6 x 14.1 x 7.2 inches
Weight: 4.85 lbs.
Additional Features: Compact and quiet
8.7
vivosun-grow Vivosun Small DehumidifierSize: 7.1 x 5.1 x 11.2 inches
Weight: 4.58 lbs.
Additional Features: Energy Saving, User Friendly
8.5


1. Vremi Dehumidifier

Highlights:

1. Power Saving
2. Auto Defrost
3. Compact

Vremi-smart

Removing over 22 pints of moisture from the air (30 Pint 2012 DOE Standard) per day, the Vremi model can dehumidify up to 1500 square feet of grow room area. It is an energy star dehumidifier with low power consumption and quick and effective moisture elimination capability. It comprises of a turbo mode that increases fan speed for maximum moisture extraction, making the grow room dry and comfortable in no time.

The Vremi unit is the best dehumidifier for grow rooms. It is a moisture maniac that is sleek, stylish, and easy to use. It has an in-built continuous pump that can conveniently eject the collected water from the 24-pint water reservoir. A hose should be connected to the port, to drain the collected water through any outlet nearby.

This is an intelligent dehumidifier that lets you relax while it does the dehumidification perfectly. You can preset the ideal moisture setting in the control panel and let it run for 24 hours until the tank is full. The auto shutoff feature pauses operation when the tank is full and resumes working only after the water is totally emptied. This feature helps prevent flooding and overflowing issues in the grow room.

When climatic conditions become very cold, the auto defrost function keeps the compressor coils from freezing, ensuring effective dehumidification. Another best feature of this unit is the memory function that makes sure the unit picks off from the predefined setting after resuming operation, post power shutdown.

The air filters need not be purchased newly, every time it gets soiled. It can be easily washed and reused, helping you save on cost and effort. Quiet, efficient, and compact, the Vremi dehumidifier for grow tent has built-in wheels and a low noise fan.

This portable dehumidifier measures 16.1 x 10.4 x 19.9 inches, weighs 33 lbs, and comes with a 12-month warranty.

Here are its pros and cons.

Pros

βœ”οΈEnergy star rated
βœ”οΈLow power consumption
βœ”οΈContinuous drainage

Cons

❌ No cons

2. Inofia 30 Pint Dehumidifier

Highlights:

1. Automatic Humidity Control
2. MERV-8 Air Filter
3. American-Made

Inofia-garage

With the capacity to remove up to 30 pints of moisture per day, the Inofia PD161C model is the best dehumidifier for grow room. It is the best electric dehumidifier with a high-efficiency compressor and fan operation.

This 30-pint dehumidifier ensures optimal moisture removal in grow rooms up to 1,500 square feet. It is the best dehumidifier for 4 x 4, 5 x 5 and even 2 x 2 grow tent areas. It has a unique sleek design that is compact and does not occupy much space and fits perfectly in your grow room.

It comprises an intelligent humidity control with a built-in humidistat that lets you set your humidity level between 30% and 80% RH. The auto-off feature switches off the system automatically when the preset humidity level in the control panel is reached. The auto-on facility switches on the unit when the moisture level increases.

Enabling manual and continuous drainage, this Inofia unit comes with a built-in pump, 3.8-pint water bucket, and 6.56 ft drain hose. The Auto shutoff feature prevents overflowing and flooding in the grow room.

The unit’s ABC housing, digital LCD humidity display, temperature readout, working status reporter, double speed fan, and reusable air filters are easy to use, clean, and maintain. Its maximum airflow capacity is 112 Cubic Feet Per Minute. The 24-hour timer helps you save on energy cost and effort.

Facilitating automatic, continuous operation even in cold climatic conditions, this unit comprises of auto defrost feature that lets this grow room dehumidifier keep running even at low temperatures down to 41 degrees Fahrenheit. Its memory feature makes this dehumidifier auto-restart after a power shutdown ensuring continuous worry-free operation under less supervision.

Measuring 8.3 x 12.2 x 17.3 inches, this Inofia model weighs 23.8 lbs. It is portable and comes with a 12-month warranty.

Here are its pros and cons.

Pros

βœ”οΈ Energy-saving and intelligent
βœ”οΈ Maximum moisture extraction
βœ”οΈ Built-in drain hose

Cons

❌ A bit noisy

3. Pro Breeze Electric Mini Dehumidifier

Highlights:

1. Budget Friendly
2. Limited Capacity
3. One year Warranty

probreeze

Removing over 1.125 pints of humidity from the air, the Pro Breeze electric mini dehumidifier is the best dehumidifier for any small grow tent. It can extract moisture from grow areas that are around 250 square feet or 220 cubic feet large.

With the ability to work optimally in temperatures ranging from 59 to 86 degrees Fahrenheit, this small dehumidifier functions without a compressor. Its built-in Thermo-Electric Cooling Technology (Peltier) ensures low power consumption and whisper-quiet operation. As energy consumption is quite low, you can save money on energy bills and maintenance.

The Pro Breeze electric unit supports easy drainage with its continuous pump, 3.25-pint transparent water bucket, and an external drain hose. When the water reservoir reaches its full capacity, the auto shut off feature turns on the LED light and turns off the dehumidifier. This facility prevents flooding issues in the grow room. When the LED light turns on, it indicates that the water reservoir needs draining. After you empty the reservoir and place it back inside the unit, the dehumidifier resumes operations, as usual.

Measuring 6.60 x 9.00 x 12.69 inches, this small dehumidifier weighs 5.08 lbs. Compared to other small dehumidifiers in the same operating range, this unit is priced competitively and will definitely help you save money when you purchase this best budget dehumidifier. It is compact, portable, and comes with a 1-year warranty.

Here are its pros and cons.

Pros

βœ”οΈ Saves money
βœ”οΈ Energy efficient

Cons

❌ Does not support the low-temperature operation

4. Ivation IVADM35 Powerful Mid-Size Thermo-Electric Dehumidifier

Highlights:

1.  Quiet
2. Auto Shut Off
3. Easy to move

ivation-mid-for-attic

Removing over 1.25 pint of moisture from the air per day, the Ivation  IVADM35 model is the best dehumidifier for grow room. It is super powerful in reducing humidity in up to 169 square feet of marijuana grow area.

As this grow room dehumidifier deploys inbuilt thermo-electric Peltier cooling technology and has no movable parts, it ensures energy efficiency, low power consumption, and whisper-quiet moisture removal. So if you are looking to place a quiet, energy-efficient dehumidifier in grow room, you can confidently choose the Ivation  IVADM35 dehumidifier.

Facilitating convenient drainage, this mini dehumidifier for grow area comes with a continuous pump and a 2-liter water tank capable of holding three days worth of water. So you need not keep emptying your water tank very often.

The auto shutoff feature ensures that your marijuana plants do not get flooded due to overflow from the water tank. The indicator light is automatically turned on to remind you to empty the tank.

Measuring 9.6 x 14.1 x 7.2 inches, this compact, small dehumidifier weighs 4.45 pounds. It comes with a 1-year full warranty.

Here are its pros and cons.

Pros

βœ”οΈ Lightweight and compact

Cons

❌ No air filters
❌ No drain hose

5. VIVOSUN Small Space Mini Dehumidifier for Grow Area

Highlights:

1. Safe
2. Auto Shut Off
3. Saves energy

grow area dehumidifier

Removing over 0.85 pints of moisture per day, the Vivosun dehumidifier is the best choice for grow rooms. It does a fantastic job of dehumidifying grow areas that are around 215-269 square feet large. It operates efficiently in temperatures between 59 and 113 degrees Fahrenheit.
This Vivosun small dehumidifier has no compressor and uses Peltier technology with secure adapters that conform to CE, FC, and UL Safety Standards. It is safe, very well ventilated, super energy efficient, and consumes less power when compared to other dehumidifiers in this range. It does not make your utility or energy bills hit the roof.

The Vivosun dehumidifier is also so easy to use, that you can just push the start button and relax, while it runs for its entire 24-hour cycle until the 1.3-liter water tank is full. The reservoir is transparent with a water level indicator. So when the tank gets full, it’s not easy to miss. The soft silicone stopper in the reservoir ensures that there is no water leak in the tank.

However, the LED light turns on to remind you to empty the water tank as soon as possible. When the water reaches the full water tank capacity, the unit’s auto shut off functionality is triggered automatically. Once you empty the water reservoir, the dehumidifier resumes operating at the preset levels. Emptying the water from the reservoir is super easy and spill-free. All you need to do is remove the silicone stopper.

Measuring  7.1 x 5.1x 11.2 inches and weighing 4.58 lbs, this small dehumidifier can easily fit into any corner. Its noise levels are quite low, and it does not disturb either you or the plants.

Here are its pros and cons.

Pros

βœ”οΈ Compact and lightweight
βœ”οΈ Energy efficient

Cons

❌ Generates a fair amount of heat

BUYING GUIDE

Make an informed decision by reading our guides and tips. We’ve tried to cover as many models as possible.

buying-icon

Signs your grow tent is too humid

Marijuana and humidity.

Humidity is both a blessing and a curse to your marijuana plants in the grow tent.
A healthy humidity level makes your marijuana healthy and helps you enjoy maximum yield. It facilitates optimal airflow, sugar production, nutrient absorption, and growth.

Marijuana plants love higher humidity when they are growing, and need lower humidity when they mature. Here are the optimal humidity levels needed for marijuana to thrive.

🌱 Clones – 70% RH
🌱 Vegetative phase – 40 to 60% RH
🌱 Flowering phase – 40 to 50% RH
🌱
Final weeks of flowering -40 to 45 % RH

But when humidity crosses optimum levels, it becomes fatal to the plants.
Humidity affects the way the plants take in water to absorb nutrients and grow to their full potential. It influences the amount of water they absorb through their roots or leaves, thus controlling nutrient intake.  

How do you know if your grow room is too humid?

Well, there are several signs that indicate the presence of excess humidity. The most significant symptoms are as follows.

πŸƒ Bud rot– If you find the marijuana buds rotting, especially during the flowering season, then definitely there is high humidity.
πŸƒ Mold and mildew – The white mold and powdery mildew in the leaves, stem, and root indicate high humidity issues. They prevent the leaves from absorbing water, light, and air.
πŸƒ Pest infestation – When you begin seeing pests such as aphids, ants, caterpillars, spider mites, etc., you most certainly have excess humidity.
πŸƒ Water stagnation– If you find puddles in your grow area, then the humidity percentage is high for sure.

Make sure you use lights that generate less heat and drain stagnant water to avoid unnecessary humidity problems.

How to lower humidity in grow tent/grow room without dehumidifier?

Though using a grow tent dehumidifier is the best way to reduce grow room humidity, other methods are available. They may not be as effective as a grow room dehumidifier.

But they can help for sure.

Here are a few ways to reduce humidity without using a dehumidifier in grow room.
1. Use an air conditioner
2. Increase ventilation
3. Insulate and seal the grow area
4. Add more fans
5. Create air holes
6. Deploy a Thermostatically Controlled Block Heater

Investing in thermometer-hygrometer combos is great for keeping track of the humidity level in the grow room.

What size dehumidifier for grow room should we buy?

Getting the dehumidifier size right plays a critical role in ensuring efficient moisture removal in the grow room area.

The first factor you need to consider is the grow tent dimension. The relative humidity requirement will vary according to the size of the structure. For example, a 4Γ— 4 grow tent may require 40% RH, while a 5Γ—5 grow tent will need at least 65% RH.

If you have small grow rooms with a 2 x 2 grow tent, 3 x 3 grow tent or 4 x 4 grow tent, you need to choose small dehumidifier units. The best dehumidifier for 2 x 2 grow tents and 4 x 4 grow area is Eva-dry Edv- 1100 electric petite dehumidifier. You can also try Eva dry e500 mini dehumidifier for silica-based renewable dehumidification options.

Both Eva-dry Edv- 1100 electric petite dehumidifier and Eva dry e500 mini dehumidifier are energy-efficient units. They consume low power and are perfect for 3 x 3, 4 x 4, and 2 x 2 grow tent areas. To speed up the process of drying marijuana, you can use mini desiccant types such as the silica gel canister dehumidifier.

Next, you need to consider the ventilation, lighting, air filter, and humidity sources of the marijuana grow area.

Once you have all the grow area specifications cleared out, you need to evaluate the dehumidifier options. Appraise the dehumidifier’s pint capacity, square feet coverage area, cubic feet volume air circulation, reservoir capacity, control panel features, power cord extensions, LED indicator facility, energy efficiency, silica gel technology usage, weight, and dimensions before choosing the right dehumidifier for grow tent.

Here is a pro tip.

Experts say that settling for the best dehumidifier with a larger pint capacity ensures effective, energy-efficient, and quick moisture removal.

Our Verdict

Now it’s time for the verdict.

Any guesses here?

Our verdict is based on two major criteria. We have evaluated the dehumidifiers for overall performance and cost-efficiency.

To evaluate overall performance and cost-efficiency, we have reviewed the pint capacity, sq ft area coverage, energy star rating, auto shut, auto defrost, led indicator and level indicator presence, water tank capacity, and other significant parameters.

So here is our take on the best dehumidifier for grow areas.

Here you go!

🌟 Best Overall – Vremi Energy Dehumidifier
🌟
Runner Up – Inofia 30 Pint Dehumidifier
🌟
Best Budget Dehumidifier – Pro Breeze Electric Mini Dehumidifier

Which grow room dehumidifier are you going to buy?

We are curious to know.

Don’t forget to conduct complete due diligence and read the table of contents on the dehumidifier package before buying the unit. Cross-check the parameters and get back to the manufacturer if you find operation mismatches.

Still, got questions?

Check out the FAQ section below.

FAQ Section

1. What is the best dehumidifier for 5×5 grow tent?

If you want to grow some extra marijuana for your therapy, then go for a bigger 5 x 5 grow tent. A bigger area enables easy customization and better growth. But the problem arises when humidity levels increase in the tent.

Any dehumidifier that can remove up to 40 to 50 pints of water from the air per day, is perfect for a 5×5 grow tent. It can be a desiccant type using silica gel technology or a compressor type or thermoelectric dehumidifier types. Preference can be given to energy star dehumidifier units with optimal pint capacity and reservoir capacity, to effectively dehumidify areas up to 2000 sq ft.

Make sure, you buy the compressor based Vremi energy dehumidifier, and Inofia 30 pint dehumidifier or the silica-based Eva dry e500 mini unit, as they are the best dehumidifiers for 5 x 5 grow rooms.

2. Does a dehumidifier raise the temperature in a grow tent?

Climate, temperature, and humidity control play a significant role in the growth of healthy marijuana plants. Controlling and balancing temperature and humidity is essential for bountiful marijuana yield.

The dehumidifier most certainly increases the temperature in the grow room by around 10 degrees. The mild heat helps to dry out the moisture from the cold damp air. This is the most effective way to remove excess moisture in a small grow tent. If you feel the heat is too much, you can use a fan or an air conditioner to cool your grow area.

3. What kind of dehumidifier is the best for 4×8 grow tent?

If you want to grow more than 100 marijuana plants for medicinal purposes, then 4×8 grow tent is the best option for you. To dehumidify the grow area, you will have to choose a dehumidifier with at least 30 PPD capacity such as Vremi and Inofia 30 pint dehumidifier.

Or if you want cost-effective, energy-efficient small dehumidifier options, you can buy Eva-dry Edv-1100 electric petite dehumidifier and Eva dry e 500 mini dehumidifier units. The Eva-dry Edv-1100 electric petite dehumidifier and Eva dry e 500 mini dehumidifier are AC compatible, compact and renewable. The Eva dry models are carefully engineered with non-toxic crystallized silica gel technologies to prevent spills and overflow in the grow rooms.

Final Words:

Ready to buy the best dehumidifier for grow tent?

We have covered all the key pointers involved in choosing the best dehumidifier to cultivate marijuana and other plants indoors. Make sure you buy the best unit to reduce and regulate humidity.

Your marijuana will thank you for amazing, lush growth.

Also, don’t forget to check out our expert reviews on the best dehumidifiers for your various needs.

author-image

About The Author

Olivia β€” a self-confessed air quality addict β€” is a home climate enthusiast, fresh air advocate, and someone with deep personal experience and knowledge about mold extermination. Her work was mentioned in countless notable humidity publications. Previously she was an editor at Mold Remediation.