Growing plants indoors require a suitable dehumidifier to avoid moisture-related issues like root rot and mold.

Based on our research and testing we have selected the best-rated dehumidifiers from various manufacturers for grow tents/rooms to help you choose the right one!

Table Of Content

• How to Calculate Dehumidifier Size for Grow Room
• What’s the Right Position to Install Your Dehumidifier
• How to Lower Humidity in a Grow Tent
• Qualities to Consider in Grow Tent Dehumidifier

Best Dehumidifier for Grow Tent

Dehumidifier	Name
CHECK PRICE	Best overall value Ivation	Suitable For: Large Grow Room Color: White & Blue Weight: 17.71 lbs Coverage: 410 sq.ft Capacity: 19 pints/day Price: $199.99 Warranty: 1-year
CHECK PRICE	Runner Up IW25 in-Wall	Suitable For: Large Grow Room Color: Grey Weight: 36 lbs Coverage: 1,500 sq.ft Capacity: 29 pints/day Price: $950 Warranty: 2-year
CHECK PRICE	Best Budget Pro-Breeze	Suitable For: Tent upto 10x10 Color: White Weight: 5 lbs Coverage: 250 sq.ft Capacity: 18 fl. oz/day Price: $79.99 Warranty: 1-year
CHECK PRICE	Best Performance AlorAir	Suitable For: Commercial Grow Color: White Weight: 57 lbs Coverage: 2,600 sq.ft Capacity: 55 pints/day Price: $877 Warranty: 1-year
CHECK PRICE	Also Great COLZER	Suitable For: Large Grow Room Color: White Weight: 30 lbs Coverage: 1,500 sq.ft Capacity: 30 pints/day Price: $169.99 Warranty: 2-year
CHECK PRICE	Also Great DEERMA	Suitable For: Tent upto 8x4 Color: White Weight: 1.65 lbs Coverage: 400 cu.ft Price: $19.99 Capacity: 150 ml
CHECK PRICE	Best Large Space Dri-Eaz 1200	Suitable For: Commercial Grow Color: Blue Weight: 80 lbs Coverage: 12,000 cu.ft Price: $1621.0 Capacity: 18 gallon Extra 1 Internal Pump Extra 2 Portable

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Small-Area Desiccant Dehumidifier Compact and Quiet

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The Ivation 19-Pint Dehumidifier is a powerful device that effortlessly removes excess moisture from room spaces, measuring up to 270 square feet. This unit provides users with both manual and continuous drainage options. Its compact, portable and offers quiet operation.

Pros

Cons

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Construction and Design

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This unit features a compact design finished with white and blue hues. Its small size allows it to fit in small spaces like grow room storage racks. It’s also designed with a water reservoir and a continuous drainage option.
It has timer settings, dimmable LCD backlight, and sleep mode, this dehumidifier is your ideal choice when looking for a unit with low power consumption. It also comes with a drain hose port that supports continuous drainage.

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Power and Dehumidification Capacity

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The Ivation 19-Pint dehumidifier utilizes a desiccant rotor that gets rid of the indoor odor. This is in addition to extracting 19 pints of moisture per day from small-sized grow tents measuring around 2×2 to 4×4. It works best in areas with low temperatures of 33°F and as high as 104°F.
The unit features an adjustable fan that runs on a regular speed for standard RH levels and turbo speed for highly moist areas.

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Setup and Usability

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This unit features an easy to use LCD control panel with six touch buttons and reservoir alert, relative humidity levels, and room temperature reading.

• This dehumidifier features a 1-12-hour timer that allows the user to set their device to run for a particular period.
• It allows the operator to adjust the desired humidity levels with 5% increments
• This dehumidifier also features a programmable swinging air vent that allows the user to direct airflow to or away from the plants.
• It comes with a removable ½ gallon water reservoir and a drain port that facilitates continuous drainage.
• Its compact size also means that it takes up a small storage space.
• It comes with a retractable top handle that makes it easy to carry from one point to another.

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Cleaning and Maintenance

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• This unit requires a thorough cleanup every two weeks.
• The operator should use a damp cloth to clean the exterior parts of the unit and a soft brush to remove dust from the grills.
• Users also need to clean the water reservoir and ensure that it’s completely dry before replacing it in the unit.
• The user must clean the filter located in the back panel with a vacuum cleaner or running water.

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Key Take-Away

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Energy-Star Rated 29 Pint Dehumidifier

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Getting rid of 29 pints per day from your grow room is now easy with the IW25-4 dehumidifier that can be mounted on the wall. It also comes with an auto-restart feature, continuous drain option, and operates remarkably quietly.

Pros

Cons

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Construction and Design

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This unit is not a looker at all; it features a box-like design with a large grill on the front, which gives it an industrial appearance. It is, however, designed to be mounted inside the wall from where it offers continuous service for many years with minimal interruption.

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Power and Dehumidification Capacity

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The IW25-4 dehumidifier has an energy star certification rating for its low power consumption, which doesn’t compromise its efficiency. It also features an auto-restart function that comes in handy after a power outage. It’s designed to remove 29 pints of moisture from large spaces measuring up to 1500 sq. ft. within 24 hours.
This unit comes with an automatic humidistat that allows it to maintain consistent levels of relative humidity.

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Setup and Usability

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The unit is designed to be fitted inside a wall and fits between 16-inch wall studs. This in-wall dehumidifier features a tamper-proof panel that covers its controls to prevent interference.

• It has a tank free operation and drains the condensate directly into a drain system. This facilitates continuous drainage for many days and without the user’s input.
• This dehumidifier also allows the user to set the desired humidity levels between 30 and 90, which makes it a suitable appliance for dehumidifying grow rooms with a wide variety of plants.
• It features an auto-restart system, therefore, it resumes operation using the previously customized settings after a power outage.

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Cleaning and Maintenance

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• The user needs to use a damp cloth to wipe off the dust from the grill cover.
• Take out the air filter by removing the front grill and subsequently clean it with warm water or a vacuum cleaner.

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Covers 250 sqft Compact and Portable

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The Pro Breeze Electric Mini Dehumidifier is the perfect definition of compact, lightweight, and portable unit for a grow room. It can be used in grow spaces measuring up to 250 sq. ft. and can remove 18 ounces of water in a day. It also operates quietly and in low temperatures of 41F.

Pros

Cons

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Construction and Design

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The Pro Breeze Electric Mini Dehumidifier features a minimalistic and compact design. This dehumidifier is mostly white and features a purple, translucent water reservoir, which gives it a somewhat attractive look. It features a simple ON and OFF control panel, two LED lights, and no digital display.

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Power and Dehumidification Capacity

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This unit features a thermos-electric cooling technology that allows it to operate quietly, efficiently, and without consuming too much electricity. It’s capable of removing 18 ounces of water from small rooms measuring up to 250 sq. ft. or a 4×4 grow tent. Despite this dehumidifier’s compact size, it comes with a generous water reservoir that holds 52 ounces of water.

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Setup and Usability

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This dehumidifier is a plug-and-go device as it comes with a simple ON/OFF button.

• It includes two LED lights, one of which indicates that the device is running while the other warns the user when the tank fills up.
• This dehumidifier features an auto-shutoff feature that stops its operation when the tank is full, which eliminates the need to babysit the unit or deal with messy spills.
• It’s easy to move around as it weighs a meager 5 pounds.
• When it comes to storage it has a quite small footprint.

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Cleaning and Maintenance

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• The user should use a vacuum cleaner to clean the air vents.
• They also need to use compressed air to clean the internal parts of the device.
• The water reservoir also requires some cleaning to prevent mold growth.

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Commercial Dehumidifier 

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The Alorair Sentinel HD55 is a commercial dehumidifier that can be used in medium to large grow spaces measuring up to 1,300 sq. ft. It utilizes a hot gas valve defrosting system that allows it to work in areas whose temperatures go as low as 36 degrees Fahrenheit.

Pros

Cons

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Construction and Design

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The Alorair Sentinel HD55 is a rectangular dehumidifier that features a horizontal and flow-through design. This dehumidifier features an air duct on one side, which allows the user to focus dehumidification on a particular area while the main unit is on another position.
Size-wise, it is quite a big device. Weighing a little bit over 57 pounds, this dehumidifier is quite heavy to carry around. Luckily, it comes with two rubber handles that allow the user to lift and move it from one place to another. However, this unit can be mounted on the wall if the user lacks enough space on the floor or shelf.

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Power and Dehumidification Capacity

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This unit is designed to handle an expansive area of up to 2,600 sq. ft. from which it removes as much as 55 pints of moisture per day.

This dehumidifier has a coefficient of performance rating of 2.4L/KWH, meaning that it quickly and efficiently removes moisture from a grow house without hiking your energy bills. A hot gas valve defrost system allows it to work continuously without pausing operation while the coils are deicing.

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Setup and Usability

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• This unit can be placed on the floor or mounted on a wall.
• It comes with a control panel that features easy to access ON/OFF button, LED lights for power, continuous mode, auto defrost, compressor light, and humidity display.
• It also comes with UP and Down humidity setting buttons to select desired relative humidity levels (RH) between 30% and 90%.
• It also features an in-built hygrometer that ensures that the set RH level is maintained.

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Cleaning and Maintenance

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• The unit requires the user to clean the exterior parts of the unit with a damp cloth.
• They can also slide out the filter from its housing and clean it with a vacuum cleaner or warm water free of any solvents or soap.
• The operator should clean the coils using an approved cleaner once a year.

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Key Take-Away

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Large Capacity Compact Dehumidifier with Continuous Drain Hose Outlet

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The COLZER 30-Pint Portable Dehumidifier is designed to provide efficient service with minimal effort from the user. Getting rid of excess humidity from your grow house or tent is now easier with this dehumidifier. This portable unit flaunts an intelligent control panel with a full tank alarm.

Pros

Cons

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Construction and Design

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The COLZER 30 Pints Portable Dehumidifier is an upright device featuring a compact design. This unit is predominantly white but features a black shade on its base and top grill. It’s essentially a free-standing device. It comes with two built-in handles and castor wheels that make it easy to move around the grow house. Also, it is sufficiently compact to fit into tight spaces.

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Power and Dehumidification Capacity

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Designed for convenient use in large areas, measuring up to 1500 sq. ft., this dehumidifier employs a powerful compressor that enables it to remove four gallons (30 pints) of water from your indoor environment in a day.

This dehumidifier comes with a built-in humidistat that allows the user to control the moisture levels in their grow tent hassle-free. It features an air filter that traps indoor pollutants, which allows it to remove excess moisture while also cleaning the air.

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Setup and Usability

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This Dehumidifier features intelligent features that make it easy to use even for people who aren’t tech-savvy. It allows the user to set their desired humidity levels between 30 % and 80% depending on the needs of their plants.

• This dehumidifier comes with an intelligent control panel that allows the user to monitor its performance and customize the grow room’s humidity levels.
• The device also features fan speed buttons that allow the user to command it to either operate faster or slower.
• There’s also a 1-24 hour timer that enables the user to set the dehumidifier to work for a certain period.
• This dehumidifier also features a full tank alert system that stops its operation when the reservoir is full.
• It also comes with a drain port that facilitates continuous drainage without the user’s input.

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Cleaning and Maintenance

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• The user can utilize a damp cloth to wipe its exterior.
• Users can also use a vacuum cleaner to get rid of dust from the air vents.
• This device also requires the filter to be washed with warm water or cleaned with a vacuum cleaner every two weeks.
• When storing this dehumidifier, the user should perform a thorough cleanup and empty the reservoir.

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Key Takeaway

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To determine the right size of a dehumidifier for your grow room, you need to consider the amount of water you feed your plants daily.

On average, plants discharge approximately 97% of the irrigation water. As such, the amount of moisture you need to remove from your grow room or tent each day should be equal to the volume of water you give your plants.

Sample Calculation:

Step 1: Given: Dehumidifiers are rated in pints, you need to convert the gallons into pints.

Step 2: Known: 1 gallon =  8 pints of water.

 Therefore, 19.4 gallons of water multiplied by eight equals to 155.2 pints.

Dehumidifier placement in a grow room is critical to the effectiveness of the dehumidification process. Whether you are using a single unit for the entire room or several dehumidifiers, you need to adhere to the following tips:

Ensure Even Distribution: Balance the distance between each unit. If you’re using a single unit, you need to place it in the middle of the room.

Maximize Airflow: Place each dehumidifier in an open space where there’s plenty of air movement. Ideally, avoid corners and ensure that there are a few feet between the filter and the wall.

In addition to using a dehumidifier, there are other methods that indoor farmers can utilize to reduce the amount of moisture in their grow room:

1. Do Not Overwater the Plants: Excessive watering is the greatest cause of superfluous humidity in a grow room. If you’re looking to reduce the humidity levels, ensure that you only irrigate the plants with the required amount of water; no more.

2. Perform a Little Defoliation: Transpiration occurs through the leaves. It’s, therefore, sensible to cut off a few leaves from plants with big foliage or large leaves when the humidity levels get out of hand.

3. Use Absorbent Soil: Using soil like sand that keeps water hidden, which reduces the rate of evaporation. You’ll, however, want to refrain from overwatering the plants lest they begin to rot from the roots.

4. Install Exhaust Fans or an Air Conditioner: You can decrease humidity levels in a grow room by installing an air conditioner, which extracts humidity from the air in your grow room as it operates. Exhaust fans also kick out the moisture and increase air circulation.

Grow room dehumidifiers come with a bunch of features, but there are some that are more important for this application.

Operating Temperatures: Dehumidifiers function optimally in a particular temperature range, with some operating in extremely low temperatures of about 41 degrees Fahrenheit.
It’s imperative to consider the operating temperature range of your prospective dehumidifier as some grow rooms require a specific level of warmth or coldness. For instance, cloning rooms need 75 °F while growing tents with plants like florist azaleas and cyclamen need chilly temperatures ranging between 45 and 55 degrees Fahrenheit.

Size of the Unit: You should also take into account the physical size of the dehumidifier. Some grow room dehumidifiers are large and heavy, which makes it tedious to carry them around. Their large size also means that they need a lot of space.
Large units typically remove a lot of moisture, making them ideal for expansive grow tents with multiple plants.
On the other hand, compact or mini-size units will save you a lot of space, but they only remove a few pints of indoor moisture in a day. They are, therefore, ideal for small grow rooms or tents where there are only a few plants.

Automatic Humidistat: It is important to get a dehumidifier that comes with an automatic humidistat. This feature will automatically detect the amount of moisture in the grow tent and trigger the dehumidifier to run when the recommended levels are exceeded.

Automatic Restart: This feature allows the dehumidifier to resume normal operation after a power outage without the user’s input. It would be a point plus to invest in a unit that resumes operation using the previously customized settings to ensure its efficiency even when you’re not available.

Grow room dehumidifiers go a long way in ensuring that your plants are not exposed to excess indoor moisture. They come with intelligent features like the auto-defrost function, continuous drainage, auto-restart, and built-in humidistat, which help them perform their duties efficiently.

The reviewed items are some excellent examples of the right dehumidifier for your grow room.