The Best Dehumidifier For Grow Room Review - Consumer Files

Best Dehumidifier For Grow Room Review 2021

In Dehumidifiers by Consumer FilesLeave a CommentLast Updated: April 21st, 2021

Our Top Picks for Each Category In 2021

Best for Small Grow Tents

Best Dehumidifier for Small Grow Room - Eva Dry E-500 Small

Eva-Dry E-500 Mini
Dehumidifier

Best for Medium Grow Tents

Best Dehumidifier For Medium Grow Tents - hOmeLabs 50 Pint Dehumidifier Small

hOmeLabs 50-Pint
Dehumidifier

Best for Large Grow Tents

Best Dehumidifiers For Large Grow Tents - Honeywell 70 Pint Dehumidifier With Pump Small

Honeywell 70-Pint
Dehumidifier

Best for Largest Operations

Best Dehumidifier For A Grow Room & Tent Largest Operations - Quest Dual Overhead 105 Pint Dehumidifier Small

Quest Dual 105 Overhead Dehumidifier



Grow tents and grow rooms are a fantastic way to grow most any type of plant in a carefully controlled environment all year round. That’s fantastic, but there’s a catch. Note the words “carefully controlled environment.”

Table of Contents hide
  1. 1 Our Selection Criteria
  2. 2 Why Relative Humidity (RH) Matters
  3. 3 Temperature & Humidity
  4. 4 How to Calculate Dehumidifier Size For a Grow Room
  5. 5 Other Things to Consider
    1. 5.1 What Can I Do If My Dehumidifier is Making My Grow Room Hot?
    2. 5.2 What is the Best Place For a Dehumidifier in a Grow Room?
    3. 5.3 Dealing with the Extracted Water
  6. 6 Best Dehumidifier For Small Grow Tents
    1. 6.1 Our Winner – Best Dehumidifier For a 3x3 Grow Tent - The Eva-Dry E-500
    2. 6.2 In Second Place – The Ivation GDM-30
    3. 6.3 In Third Place – The Gurin DHMD-310 Mid-Size Electric
  7. 7 Best Dehumidifier For Medium Grow Tents
    1. 7.1 Our Winner - The HomeLabs 50 Pint Dehumidifier
    2. 7.2 In Second Place - The EdgeStar 50 Pint Dehumidifier
    3. 7.3 In Third Place - The Yaufey 30 Pint Dehumidifier
    4. 7.4 Honorable Mention - The Ivation 30 Pint Dehumidifier
  8. 8 Best Dehumidifier For Large Grow Tents Or Small/Medium Sized Grow Rooms
    1. 8.1 Our Winner – The Honeywell 70 Pint Dehumidifier With Pump
    2. 8.2 In Second Place – The Frigidaire 70 Pint Dehumidifier With Pump
    3. 8.3 In Third Place – The Haier 70 Pint Dehumidifier With Pump
  9. 9 Best Dehumidifier For a Grow Room & Tent (Largest Operations)
    1. 9.1 Our Winner – The Quest Dual Overhead 105 Pint Dehumidifier
    2. 9.2 In Second Place – The Quest CDG174 Dehumidifier
    3. 9.3 In Third Place – The Keystone 95 Pint Dehumidifier
  10. 10 Conclusion
  11. 11 Gone, But Not Forgotten
    1. 11.1 Quest PowerDry RDS10 Dehumidifier
    2. 11.2 Soleus Air HCT-D70 Grow Room Dehumidifier
    3. 11.3 Ideal Air 70-Pint Dehumidifier
    4. 11.4 Active Air 100 Dehumidifier

Plants that are growing in the great outdoors get light from the sun and water from rain. If you’re growing indoors, it’s on you to simulate the natural growing environment for your plants, or even better, to optimize it for the types of plants you’re growing. That necessarily requires active participation on your part to ensure that your plants are getting exactly what they need to thrive, and that you’re removing elements from your controlled growing space that could potentially be harmful to your plants.

Plants that are growing in the great outdoors get light from the sun and water from rain. If you’re growing indoors, it’s on you to simulate the natural growing environment for your plants, or even better, to optimize it for the types of plants you’re growing. That necessarily requires active participation on your part to ensure that your plants are getting exactly what they need to thrive, and that you’re removing elements from your controlled growing space that could potentially be harmful to your plants.

Among other things, it’s going to be on you to control things like:

  • The amount and quality of light your plants get
  • The temperature of the grow tent or room
  • The amount of air flow into the growing space
  • The amount of water the plants get
  • And the relative humidity (RH) in the growing space

If any of these elements are out of balance and not optimized for the types of plants you’re growing, you’re almost certainly going to be disappointed in your harvest.

Controlling for all of these factors is well beyond the scope of this roundup. Here, we’re going to be focused specifically on dehumidifiers and their ability to control the relative humidity of your growing space.

To that end, we’ve scoured the market on a quest to find the very best dehumidifier for a grow room on the market today and have found and declared a few different winners. Ultimately, we couldn’t declare a single winner because grow tents and rooms come in all shapes and sizes and what’s optimal for a 2’x2’ grow tent is completely inadequate to a 10’x10’ (or larger) room.

We'll announce the winners and their contenders, but first, let’s briefly discuss our selection criteria. 

Our Selection Criteria

In evaluating products in the various categories above, we looked at a number of different things, including:

  • Each machine’s water-extracting capacity (which is important for properly sizing a dehumidifier for your grow room, which is a topic we’ll discuss in more detail in just a bit)
  • Its ease of use
  • The presence of advanced features and automation
  • And the reliability of the brand offering the product in question

Each of these elements is important in its own way but taken together, they provide a good composite view of what each model is capable of and give us some understanding of each machine’s overall value to you, the grower.

Unfortunately, the perfect dehumidifier for a grow room does not exist. That’s because there are a number of important elements to consider, and each person is going to place a different level of value and importance on those factors than the next person will.

Why Relative Humidity (RH) Matters

No matter what you’re growing, plants need water. Relative humidity (RH) is the amount of moisture in the air. If the air is too humid, you’ll facilitate the growth of mold on your plants, which will kill them. Too little humidity and your plants won’t be getting the water that they need. Your goal, as a grower, is to find the sweet spot that keeps your plants happy.

The question, then, is what’s the sweet spot? The answer depends on a number of factors including what plants you’re actually growing and their relative age, but here are a few general guidelines you can use as a starting point:

Seedlings

Vegetating Plants

Flowering Plants

Harvesting

Again, treat these as general guidelines. The specific numbers will vary depending on exactly what it is you’re growing. The main point is simply this: Maintaining tight control over the relative humidity of your growing space is incredibly important, and the right dehumidifier for a grow room is critical to that effort.

Temperature & Humidity

Temperature is also a factor here because temperature and humidity go hand in hand. It’s not really possible to talk about one without at least making mention of the other. With that in mind, here are general temperature thresholds to keep firmly in mind:

  • For seedlings, shoot for a temperature band between 74 and 78 degrees (Fahrenheit)
  • For vegetating plants, shoot for a temperature band between 70 and 78 degrees (Fahrenheit)
  • For flowering plants, shoot for a temperature band between 68 and 75 degrees (Fahrenheit)
  • And as harvest time nears, shoot for a temperature band between 65 and 74 degrees (Fahrenheit)

Ultimately, these things matter because water is the means by which nutrients move from a plant’s root system and into the rest of the plant. Not enough water means that your plants will be starved for the nutrients they need, which is why you’ll see stunted growth.

The roots of your plants will wind up hoarding what water there is, which will overload them with an excess of nutrients that never make it to the rest of the plant. It also makes your plants more likely to be infested with spider mites and other insect infestations, and you may see a white, powdery mildew forming on them.

Conversely, as plants mature, exposure to too much water and humidity can lead to problems that are every bit as dire. Simply put, too much water will drown the roots of your plants, preventing them from being able to absorb gasses from the soil. At that point, it doesn’t matter how many other factors you get right; the show’s over.

How to Calculate Dehumidifier Size For a Grow Room

Whether your question is ‘What size dehumidifier do I need for my grow room?’ or ‘What size dehumidifier do I need for my grow tent?’ the answer comes down to how much water you’re feeding your plants on a daily basis and how many plants you’ve got. Those are the key pieces of information you’ll need when properly sizing a dehumidifier for your growing space.

Most gardening experts recommend 0.623 gallons of water per square foot per week. While this varies depending on exactly what you’re growing, it’s a useful benchmark and can give you some hard numbers to work with.

Start by figuring out how much growing space you have and remember that you may have more than you think. For instance, ostensibly, a 2x2 grow tent has 4 square feet, but if you’re planting in tiers and using the vertical space to get more plants in the tent, your effective growing space (and thus, your water needs) will be higher.

Remember, there are 8 pints to a gallon. Also remember that some plants wind up giving back almost all the water you feed them, while others (including most vegetables) tend to hold onto much of the water you give them. So again, it pays to have a deep understanding of what you’re growing and how much water they need to thrive.

Hence, the Formula - Dehumidifier Calculator For a Grow Room (Or Tent)

(Growing space in square feet * 0.623) = Weekly Water Requirement
Weekly Water Requirement/7 = Daily Water Requirement (in gallons)
Daily Water Requirement (Gals) * 8 = Pints of Water

With this last figure being the maximum extraction capacity you’d want to shoot for, and again, understanding that there’s runoff and other factors to consider which may shade your final figure. For instance, a single cannabis plant requires about 1.4 pints of water per day, on average—modified by local conditions--so if that’s what you’re growing, then your figures will be different.

Generally speaking, though, you want an extraction capacity equal to the amount of water you introduce into the system.

Your formula for how to size a dehumidifier for a grow room can get more complicated than this and try to take into account the amount of runoff that never actually makes it to the plants (and there’s always some). But where a dehumidifier’s capacity is concerned, you generally want to overshoot what you actually need by at least a bit.

There is a tradeoff, of course. If you wildly overshoot your extraction needs, then you’re paying a premium for capacity you’ll never use. On the other hand, if you cut it too close to the bone, then you’ll find yourself in a situation where your dehumidifier in a grow room is running all the time and struggling (or simply failing outright) to keep pace with the water you’re introducing, which means the humidity level won’t drop by the amount you’re hoping.

Worse, with the machine running on a constant basis, you’re introducing heat to the system, which could cause the temperature to creep up and out of your ideal band. That’s part of your challenge: Keeping all the factors critical to the success of your growing space in balance!

Other Things to Consider

What Can I Do If My Dehumidifier is Making My Grow Room Hot?

This is or can be, a genuine problem. After all, most dehumidifiers rely on motors to do their work and will give off heat. Your grow tent or grow room is a confined space, and absent a robust ventilation system; the heat will get trapped in the room and increase the temperature over time.

There are a number of possible fixes here if you start seeing this happening. These include things like:

  • Investing in a bigger dehumidifier that doesn’t run as often
  • Increasing the ventilation in your growing space
  • Or introducing an air conditioner into the mix to help bring the temperature back down

Each person’s setup is different, and there’s no one right answer here. It comes down to experimentation and finding the best mix of technologies for you to keep the conditions inside your grow tent or room in balance.

What is the Best Place For a Dehumidifier in a Grow Room?

As with everything else, the answer is “it depends.” There are a number of factors to consider. 

Check the Manual

First and foremost, you want to be sure that wherever you put your dehumidifier, you’re abiding by the manufacturer’s guidelines where proper ventilation is concerned. This varies from one unit to the next, so be sure to check your user manual for guidance. Generally speaking, you’ll want to allow at least 18” of clearance between the air intakes and the nearest wall or major obstruction.

Number of Dehumidifiers

In addition to that, there’s the question of how many dehumidifiers you’re deploying in a given space. If you’re just deploying one, then placing it in a central location inside the space is good, and placing it high is even better if the unit has a gravity drain. If you’re deploying several, then you’ll want to evenly space them and arrange them in such a way that you’re providing good, even coverage throughout the space.

Zones with Different Humidity Levels

Note that if you have an especially large grow room, you can, by strategically placing your dehumidifiers, create zones that have slightly different relative humidity levels. That’s useful if you’re growing plants in varying stages of maturation.

Dealing with the Extracted Water

Broadly speaking, dehumidifiers are designed around one of three basic strategies for dealing with the water they extract.

Reservoir

All dehumidifiers come with a reservoir or some means of trapping and storing the water they extract. The limitation with that approach is that you have to periodically empty the reservoir to keep the extraction going, which means babysitting the process.

Drain

Once you start looking at dehumidifiers that extract 30+ pints of water per day or so, you’ll start seeing many that come with a simple gravity drain system. These units still have a water collection reservoir, but they also come with a drain port.

Put a hose in the drain port and let gravity route the water through the hose and out of your life. Where you direct the water is up to you. A sink or tub drain, a rain collection barrel, your flower garden, wherever. That part’s up to you.

Obviously, there are some limitations to this approach, though. Gravity drains are a little fickle because, of course, the hose has to point “all downhill.” You can’t have it going down, then up, then back down, or winding around in circuitous paths, you’ve pretty much got to have a straight downhill path for the water to flow, which means you’ll probably need to set your dehumidifier high (on a shelf, or hang it some way or another) and let the water flow down and away.

Pump

The best dehumidifiers come with a built-in pump that will route the water out of the area and out of your life. These cost a bit more, but are a whole lot more convenient and give you a great deal of flexibility.

If you’re only extracting a few pints of water per day, there’s not much incentive to, nor gain in trying to reclaim that little bit of water to reuse on your plants. The more water you’re extracting though, the more attractive that option becomes.

Reusing the Extracted Water

If you decide you want to reuse that water, you’ll need to take a few precautions, though. Cheaper dehumidifiers tend to leach out copper and aluminum, and there’s a very good chance that over time, mold will start growing inside the system.

You can combat the first problem by investing in a higher-end unit and the second by regularly inspecting and cleaning your unit. Yes, it’s more expensive and labor-intensive, but if you’re extracting a ton of water and want to reuse it, that’s what it takes to make sure you’re not poisoning your plants!

Now that we’ve discussed the particulars in some detail let’s take a closer look at our winners in the various categories. 

Best Dehumidifier For Small Grow Tents

Best Humidifier for Small Grow Tents

Best Dehumidifier for Small Grow Room - Eva Dry E-500 Small

Eva-Dry E-500

Best Dehumidifier for Small Grow Room - Ivation GDM30 Small

 Ivation GDM30

Best Dehumidifier for Small Grow Room - Gurin DHMD 310 Small

Gurin DHMD-310

Price

$

$$$

$$$

Overall Rating

4.25

4.13

3.94

Pros

Incredibly inexpensive and long-lasting. Great for deploying in packs! Hands down the best cheap dehumidifier for a grow tent.

Uses extremely efficient Peltier technology. Auto shutoff prevents reservoir overflow. Better than average product quality for an import. Good reputation for customer service and support.

Uses extremely efficient Peltier technology. Auto shutoff prevents reservoir overflow. Gurin’s products are a cut above and the company puts some effort into customer service.

Cons

Tiny. Individually they don’t absorb much water so you’ll need to buy at least three (fortunately, they’re a third the price of comparable dehumidifiers)

Peltier technology is very efficient, but slow.

Peltier technology is very efficient, but slow.

Our Verdict

Highly recommended. They last up to ten years, making them a superb value.

In our view, this is the second-best mini dehumidifier for a grow tent. As long as you keep its inherent limitations in mind, we recommend it.

As long as you keep its inherent limitations in mind, we recommend it.

Top Pick

Best Dehumidifier for Small Grow Room - Eva Dry E-500 Small

Eva-Dry E-500

RATING

PRICE

$

Pros

Incredibly inexpensive and long-lasting. Great for deploying in packs! Hands down the best cheap dehumidifier for a grow tent.

cons

Tiny. Individually they don’t absorb much water so you’ll need to buy at least three (fortunately, they’re a third the price of comparable dehumidifiers)

oUR vERDICT

Highly recommended. They last up to ten years, making them a superb value.

Second Place

Best Dehumidifier for Small Grow Room - Ivation GDM30 Small

Ivation GDM30

RATING

PRICE

$$$

Pros

Uses extremely efficient Peltier technology. Auto shutoff prevents reservoir overflow. Better than average product quality for an import. Good reputation for customer service and support.

cons

Peltier technology is very efficient, but slow.

oUR vERDICT

In our view, this is the second-best mini dehumidifier for a grow tent. As long as you keep its inherent limitations in mind, we recommend it.

Also Good

Best Dehumidifier for Small Grow Room - Gurin DHMD 310 Small

Gurin DHMD 310

RATING

PRICE

$$$

Pros

Uses extremely efficient Peltier technology. Auto shutoff prevents reservoir overflow. Gurin’s products are a cut above and the company puts some effort into customer service.

cons

Peltier technology is very efficient, but slow.

oUR vERDICT

As long as you keep its inherent limitations in mind, we recommend it.

Our Winner – Best Dehumidifier For a 3x3 Grow Tent - The Eva-Dry E-500

Best Dehumidifier for Small Grow Room - Eva Dry E-500

Eva-Dry E-500 Dehumidifier

Eva-Dry E-500

Value

Feature Set

Ease of Use

Brand Reliability

Summary

4.25

The Eva Dry E500 is small, unobtrusive, effective. Recommended for anyone with modest moisture problems to deal with. These are fantastic.

At first glance, the E-500 might seem like an unlikely pick to win top honors in this category. After all, it’s tiny, and it doesn’t extract much water. Appearances, though can be deceiving.

Cost-Effective

First and foremost, this unit costs about a third of what its peers will run you, so you can buy three for the price of one of any of the others. When you do, the amount of water extraction equals out. These little guys work fantastically when operated in packs! In fact, why the company doesn’t sell a 3- or 4-pack of these, we’re not quite sure.

Quality and Warranty

Second, the big problem with most of the low-cost, small-space dehumidifiers is the fact that they’re Chinese imports and made with lower quality components that just don’t last very long. Best case, you can expect them to provide about two years of service, and then you’re going to simply toss them out and replace them.

That’s not the case with the E-500. The simple heating element is the only thing that could be construed as a mechanical part, and it doesn’t move, so it’s not likely to break, and the silica beads that absorb the moisture can be used over and over again. That’s why these simple machines have an impressive five-year warranty and can last up to a decade.

Capacity

When you take that into account and factor in the money you’ll save by not having to purchase new mini-dehumidifiers every couple of years; it’s awfully hard to argue against these handy little units. The only real downside is that they can be easily overwhelmed. These aren’t the units you want if you have a medium-sized or larger grow tent, or even a modestly sized grow room.

On the other hand, if you have a musty closet, a bathroom that’s consistently muggy, or if you need a low-cost dehumidifier for a grow closet, these little units are worth double or triple their weight in gold. They’re simple, long-lasting, and effective. We recommend this model, provided you take care not to overwhelm it (which is fairly easy to do)!


In Second Place – The Ivation GDM-30

Ivation GDM-30

Value

Feature Set

Ease of Use

Brand Reliability

Summary

4.13

A very basic, small capacity dehumidifier. Ivation GDM30 Dehumidifier is recommended for RV owners, indoor growers with very small grow tents or few plants that don’t require much water. Also good for smaller rooms with minor humidity issues.

Design-wise, the Ivation GDM-30 is about as simple as it gets. It’s got a delightfully small footprint, is very lightweight, and only extracts a modest amount of water every day. It is a highly efficient little machine, though, utilizing Peltier technology to handle the moisture extraction function.

Without wading too deeply into the technical details, Peltier technology works by creating a temperature differential inside the Peltier module in the machine, and it is this differential that actually extracts moisture from the air.

As we said, it’s an incredibly efficient and effective design, but there’s a catch: It’s also really slow. Don’t expect to see immediate results if you buy this machine. It will get the job done, but it’ll do it at a snail’s pace, which is ultimately why it didn’t win top honors.

Ivation is a good company, and although they import their products from China for resale, the quality of their wares is generally a cut above from what you see from most Chinese imports.

This is a function of a few different factors working in tandem. First, the overall quality of Chinese manufacturing has been steadily increasing in recent years anyway. Second, Ivation demands higher quality from their manufacturers, and third, Peltier technology is simple, robust, and effective.

Even if the quality of the materials is somewhat low, the tech itself is rock solid.

Put those elements together, and Ivation’s mini dehumidifier is a pretty good little machine. Granted, it’s very easy to overwhelm a tiny unit like this, so it is at its most effective in small, tight spaces or tiny grow tents. As long as you’re mindful of this unit’s limitations, however, it will serve you well and reliably and is a very good dehumidifier for a small grow tent. On that basis, we provisionally recommend it.


In Third Place – The Gurin DHMD-310 Mid-Size Electric

Best Dehumidifier for Small Grow Room - Gurin DHMD 310

Gurin DHMD-310

Gurin DHMD-310

Value

Feature Set

Ease of Use

Brand Reliability

Summary

3.94

The Gurin DHMD-310 is a smallish, easy-to-use dehumidifier. Recommended for anyone with a small growing space, a single room, or an RV, who finds themselves in need of a means of controlling humidity.

Gurin is a smaller brand and not especially well-known, but they’ve been in the business for a long time, and they have a reputation for making consistently good products and for actually putting some effort into their customer service.

That’s noteworthy because so often, the smaller brands pay only lip service (if that) to the idea of customer service and support. Gurin goes out of their way to do a good job here and that, as much as anything, sets them apart and makes them well worth considering.

Both aesthetically and in terms of feature set, the Gurin 310 is virtually identical to the slightly more expensive Ivation dehumidifier we talked about just above, and like the Ivation, it utilizes Peltier technology to handle water extraction.

That’s both good and bad for the same reasons we discussed above. Good because Peltier technology is rock solid and reliable, which makes this little dehumidifier much better quality than you might otherwise expect. Not so good because it is slow. Like the Ivation, don’t expect this little guy to win any water extraction speed contests. You’ll be disappointed.

On the other hand, it’s quiet, efficient, and effective. If you’re only dealing with a small space and don’t have to worry about extracting too much water from the air, a little unit like this is perfect, and given Gurin’s reputation for quality and customer support, it’s a safe choice and an excellent budget option if you’re in the market for something like this.

A solid, small dehumidifier for a grow tent and a great alternative to the Ivation if that one doesn’t work for you for one reason or another.


Best Dehumidifier For Medium Grow Tents

Best Dehumidifier For Medium Grow Tents

Best Dehumidifier For Medium Grow Tents - hOmeLabs 50 Pint Dehumidifier Small

​HomeLabs 50 Pint Dehumidifier

Best Dehumidifier For Medium Grow Tents - EdgeStar 50 Pint Dehumidifier Small

​EdgeStar 50 Pint Dehumidifier

Best Dehumidifier For Medium Grow Tents - yaufey 30 Pint Home Dehumidifier Small

Yaufey 30 Pint Dehumidifier

Best Dehumidifier For Medium Grow Tents - Ivation 30 Pint Energy Star Dehumidifier Small

Ivation 30 Pint Dehumidifier

Price

$$$

$$$$

$$

$$

Overall Rating

4.44

4.39

4.31

4.25

Pros

Simple, rugged, robust design. Gravity drain.

One of a relatively few dehumidifiers in its size class that comes with a dedicated pump. Full-featured and offered by a company with an excellent reputation for customer service.

Surprisingly good quality. Full featured. Gravity drain.

Solid value for the money. Gravity drain and better quality than you might expect. Offered by a company with a good reputation for customer service.

Cons

You’ll need to invest in a few extras to get full use out of it (extension cord, drain hose, and a hygrometer if you’re a grower).

Pricey,

Offered by a smaller brand, not as well known in the US.

Humidistat is not very accurate, which may be problematic for growers. Somewhat less energy efficient than many of its peers.

Our Verdict

In our view, this is the best dehumidifier for a 5x5 grow tent. Recommended. 

Recommended.

We regard this as being the best dehumidifier for a 4x4 grow tent, where 50 pints per day might be more than you need.
Provisionally recommended.

Provisionally recommended. While not best in class, this is a good dehumidifier for smaller grow tents

Top Pick

Best Dehumidifier For Medium Grow Tents - hOmeLabs 50 Pint Dehumidifier Small

HomeLabs 50 Pint Dehumidifier

RATING

PRICE

$$$

Pros

Simple, rugged, robust design. Gravity drain.

cons

You’ll need to invest in a few extras to get full use out of it (extension cord, drain hose, and a hygrometer if you’re a grower).

oUR vERDICT

In our view, this is the best dehumidifier for a 5x5 grow tent. Recommended.

Second Place

Best Dehumidifier For Medium Grow Tents - EdgeStar 50 Pint Dehumidifier Small

EdgeStar 50 Pint Dehumidifier

RATING

PRICE

$$$$

Pros

One of a relatively few dehumidifiers in its size class that comes with a dedicated pump. Full-featured and offered by a company with an excellent reputation for customer service.

cons

Pricey,

oUR vERDICT

Recommended.

Also Good

Best Dehumidifier For Medium Grow Tents - yaufey 30 Pint Home Dehumidifier Small

Yaufey 30 Pint Dehumidifier

RATING

PRICE

$$

Pros

Surprisingly good quality. Full featured. Gravity drain.

cons

Offered by a smaller brand, not as well known in the US.

oUR vERDICT

We regard this as being the best dehumidifier for a 4x4 grow tent, where 50 pints per day might be more than you need.
Provisionally recommended.

Honorable Mention

Best Dehumidifier For Medium Grow Tents - Ivation 30 Pint Energy Star Dehumidifier Small

Ivation 30 Pint Dehumidifier

RATING

PRICE

$$

Pros

Solid value for the money. Gravity drain and better quality than you might expect. Offered by a company with a good reputation for customer service.

cons

Humidistat is not very accurate, which may be problematic for growers. Somewhat less energy efficient than many of its peers.

oUR vERDICT

Provisionally recommended. While not best in class, this is a good dehumidifier for smaller grow tents

Our Winner - The HomeLabs 50 Pint Dehumidifier

Best Dehumidifier For Medium Grow Tents - hOmeLabs 50 Pint Dehumidifier

hOmeLabs 50 Pint Dehumidifier

hOmeLabs 50 Pint Dehumidifier

Value

Feature Set

Ease of Use

Brand Reliability

Summary

4.44

The HomeLabs 50 Pint Dehumidifier is an expertly designed medium-sized dehumidifier perfect for numerous applications. Recommended for anyone with a moderate humidity issue. Growers with small grow rooms or medium-sized grow tents.

Our overall winner in this category comes to us from HomeLabs. While not a giant in the industry, they have an excellent reputation for both quality and customer support, and their 50-pint dehumidifier is full-featured and expertly designed.

Specifications

Before we dig into the specific features it has on offer, let’s begin by taking a quick look at the basic stats that drive and define this model:

  • Overall Product Dimensions: 15.4” x 11” x 24.3”
  • Product Weight (No Water In the Tank): 40 pounds
  • Extraction Capacity: 50 pints per day
  • Reservoir Size: 1.8 gallons (14.4 pints)
  • Power cord length: 6 feet
  • Included drain hose length: No drain hose included
  • Power supply: 780 Watt (max)

One thing for growers to be mindful of here is the fact that this unit utilizes a bit more energy than many comparably sized units, and it will add some heat to whatever growing space you’re using it in. You’ll need to plan around that, and be sure to include some strategy for mitigating the heat.

If you don’t, you’ll find yourself in the unhappy position of solving for your humidity issue, only to discover that the temperature in your grow space is no longer ideal.

Power Cord

Also note that depending on the size of your grow tent or room and where you want to place the unit, you may have to break out a heavy-duty extension cord to get it where you want it, as the power cord is likely to not be long enough in a significant percentage of situations.

No Drain Hose

We’re actually fine with the fact that HomeLabs opted not to include a drain hose with this model because, in our experience, most companies that offer one tend to offer short-ish lengths of hose anyway, prompting you to have to go out and buy one long enough to actually be useful.

Humidistat

The built-in humidistat is fairly accurate, and you’ll find that the values displayed on the dehumidifier’s control panel track pretty closely to the values your hygrometer is reporting, and you’ll start seeing results fairly quickly.

Warranty

It’s an impressively powerful and capable unit with a 2-year warranty, which the company will extend by an additional six months if you register your product within 14 days of your purchase.

Quality

It’s worth mentioning that HomeLabs designs its products in the US and outsources manufacturing to China. The overall quality isn’t quite as good as you find in dehumidifiers manufactured in the West, but HomeLabs holds their manufacturer to high standards, and the quality is better than you typically see from Chinese imports.

Features

Feature-wise, you’ll find that is has the basics well-covered and includes:

  • A two-speed fan
  • An auto-restart function
  • Auto-defrost
  • And two modes of operation. You can either set the machine to run for X number of hours or choose a target humidity level, which, in practice, is how most growers will use the machine.

Air Filter

It also comes with a washable filter that will help to clean the air, removing dust, mold spores, pet dander and the like. Just remember to pause the unit so you can wash the filter every couple of weeks, and it will serve you quite well.

For best results, you’ll want to mount this unit on a shelf or workbench to create some height, which will allow the gravity drain to function more effectively.

Capacity

If you opt not to make use of the gravity drain, the unit will require a bit more babysitting, and in high moisture environments, you’ll find that you have to empty the reservoir 3-4 times a day. That’s not bad, considering that some units on the market today are saddled with relatively small reservoirs relative to their extraction capacity and require you to empty it 8-10 times a day.

Overall, this is a super strong unit and an ideal choice for a 4’ x 4’ or 5’ x 5’ grow tent, or even a modestly sized grow room, depending on how many plants you’re working with and how much water you’re feeding them on a daily basis. It’s well-deserving of top honors here, and we absolutely recommend it.


In Second Place - The EdgeStar 50 Pint Dehumidifier

Best Dehumidifier For Medium Grow Tents - EdgeStar 50 Pint Dehumidifier

EdgeStar 50 Pint Dehumidifier

EdgeStar 50 Pint Dehumidifier

Value

Feature Set

Ease of Use

Brand Reliability

Summary

4.39

The EdgeStar 50 Pint Portable Dehumidifier is a simple, effective design for hassle-free operation. Recommended for anyone with a moderate humidity problem.

EdgeStar actually has a lot in common with our top pick. They’re a smaller American company that’s been in the business for a while and they’ve got a better than average reputation when it comes to both the quality of their products and the level of customer service and support they provide.

Also, like HomeLabs, they design their products here in the US, then outsource their manufacture to China to help keep costs low. In that respect, the same caveats we mentioned with HomeLabs apply here.

This particular model has a lot to offer and only narrowly lost out to the HomeLabs dehumidifier. Among other things, it has the distinction of being the only dehumidifier in this section of our review that comes with a dedicated pump, which makes it an extremely convenient, mostly hands-free unit that doesn’t require a lot of babysitting.

Specifications

Before we go further, let’s do a quick review of the unit’s basic stats. Here they are:

  • Overall Product Dimensions: 11.1” x 15.2” x 23.8”
  • Product Weight (No Water In the Tank): 38 pounds
  • Extraction Capacity: 50 pints per day
  • Reservoir Size: 18 pints (2.25 gallons)
  • Power cord length: 6.5 feet
  • Included drain hose length: 16 feet
  • Power supply: 540 Watt (max)

Power Usage

The big thing to talk about here is the power usage. This little unit uses an almost shockingly modest amount of power, especially given that it has both a compressor and a dedicated pump, and note that it uses significantly less power than our top pick. If temperature control and convenience are the main things you’re after, this unit could easily replace the HomeLabs dehumidifier as your top pick.

Drain Hose

A smaller point, but a very nice touch on the part of EdgeStar, is the fact that this one comes with a drain hose that’s long enough to be useful, so there’s nothing else you’ll need to buy to put it into service.

Smart Features

Feature-wise, this unit is identical to our top pick, with a two-speed fan, auto shutoff, and auto-defrost. It also comes with two modes of operation; you can either set the unit to run for X number of hours or set a target humidity level for it to reach.

Humidistat

The on-board humidistat offers about the same level of accuracy as the one on our top pick too, and it has the added convenience of having the dedicated pump, which isn’t nearly as fickle as a gravity-drain system.

Filter

In addition to that, it includes a washable filter so it returns air to the space you’ve got it in with fewer pollutants than were in it when it entered the machine. Given all that, you might wonder why this unit didn’t win top honors.

The answer comes down to two things. First, EdgeStar doesn’t have quite as good a reputation as HomeLabs (close, but not quite), and second, the addition of the dedicated pump adds significantly to the total cost of the unit. You’re paying a hefty premium for convenience, and not everyone is going to want or be able to afford that, which makes the HomeLabs offering slightly superior in our view.

Even so, if you’re looking for a great dehumidifier in this size range and you want one that has a dedicated pump, this is an awesome choice, and this model is well-deserving of a second-place spot in this part of our roundup review. It’s an excellent, highly convenient dehumidifier for a 4’ x 8’ grow tent with a high planting density, and could easily serve larger grow tents with lower plant densities and water use. We recommend it.


In Third Place - The Yaufey 30 Pint Dehumidifier

Best Dehumidifier For Medium Grow Tents - yaufey 30 Pint Home Dehumidifier

Yaufey 30 Pint Home Dehumidifier

yaufey 30 Pint Home Dehumidifier

Value

Feature Set

Ease of Use

Brand Reliability

Summary

4.31

The Yaufey 30 Pint Dehumidifier is surprisingly robust and full-featured, this little dehumidifier doesn’t disappoint! Recommended for anyone with a light to medium humidity problem. Perfect for people with smallish to medium-sized indoor growing spaces.

If fifty pints per day of water extraction is more than you need, and you’re looking for a simple, surprisingly well-made 30-pint model, then the Yaufey belongs on your shortlist of options to consider. Like the other models featured in this segment of our roundup review, Yaufey imports their wares from China for resale here.

We won’t rehash why that matters except to say that the usual caveats that go along with that apply. Even so, the company has a better than average reputation where both overall product quality and support are concerned, which makes their dehumidifiers a cut above what you find offered by the legions of low-cost import models offered elsewhere.

Specifications

As we’re in the habit of doing, let’s start with a quick review of the basic stats that define this model:

  • Overall Product Dimensions: 12.2” x 8.2” x 18.9”
  • Product Weight (No Water In the Tank): 23.8 pounds
  • Extraction Capacity: 30 pints per day
  • Reservoir Size: 1.8 liters (0.47 gallons) (3.8 pints)
  • Power cord length: 4.9 feet
  • Included drain hose length: 6.5 feet
  • Power supply: 260 Watt (max)

A Few Things to Consider

There are a couple of noteworthy things about these numbers. First and foremost is the modest power requirements. While it’s true that this unit will add some heat to any grow space it’s used in, the amount is quite modest and easily countered.

Second, you’re definitely going to want to use the gravity-drain with this unit because the reservoir is somewhat undersized, and if you don’t, you’re going to find yourself having to empty the bucket on a regular basis which is going to mean keeping a close eye on it.

Unfortunately, the included drain hose is too short to be useful in a significant percentage of cases, so you’ll probably need to invest in a long one, and while you’re at it, if you don’t have a spare heavy-duty extension cord, get one of those too.

The good news is that since this model is delightfully low-priced, you’ll have plenty of money left over for those extras.

Features

Feature-wise, this is a robust little unit with all the same features that our top pick has on offer (auto shut-off when the reservoir is at capacity, auto-defrost, an accurate build-in humidistat, and a two-speed fan). It’s also got a basic, washable filter so it will do something to pull pollutants out of the air, in addition to the water it extracts.

Warranty

The standard warranty on this unit is one year, but if you register your product within 14 days of your purchase, the company will extend it to two. That’s pretty good for a Chinese import and speaks to the higher than average product quality you get from this brand.

It’s quiet, capable, and it sips power. It’s a little small for us, but it’s one of the best dehumidifiers for small grow tent with a high density of plants, or a lower-density medium sized indoor growing space. On that basis, we provisionally recommend it.


Honorable Mention - The Ivation 30 Pint Dehumidifier

Best Dehumidifier For Medium Grow Tents - Ivation 30 Pint Energy Star Dehumidifier

Ivation 30 Pint Dehumidifier

Ivation 30 Pint Dehumidifier

Value

Feature Set

Ease of Use

Brand Reliability

Summary

4.25

The Ivation 30 Pint Energy Star Dehumidifier is a well-designed, full-featured dehumidifier for general use. Recommended For: Anyone with a modest humidity problem in homes, boats or RVs. Growers with smaller grow rooms or medium-sized grow tents.

Denver-based Ivation wins another spot in our roundup review with their 30-pint per day design. We regard it as marginally weaker than Yaufey’s model, but functionally similar.

Specifications 

We’ll start by reviewing the basic stats of the model and go from there:

  • Overall Product Dimensions: 13.4” x 9.9” x 21.3”
  • Total Weight (No Water In The Reservoir): 30 pounds
  • Extraction Capacity: 30 pints per day
  • Reservoir Size: 1.3 gallons
  • Length of Power Cord: 6’
  • Length of Included Drain Hose: 3’
  • Power Supply: 380 Watts

Reservoir & Drain

In comparing these numbers with the Yaufey 30-pint, it reveals why that model narrowly beat it out. Although the Yaufey has a smaller reservoir and a longer included drain hose, those are largely cosmetic issues that are easily solved by other means.

You can buy a drain hose of whatever length you desire for a song, and both units feature gravity drains, which limits the importance of the reservoir size (assuming you’re making use of the drain).

Power Usage

Given that, the headline here is power usage, and over time, the Yaufey will save you money while extracting the same amount of water. That’s a big deal because it directly impacts your budget, and ultimately why this unit narrowly lost out to Yaufey.

Features

Feature-wise, it’s virtually identical with Yaufey, with a two-speed fan, auto-defrost, auto-restart, and two modes of operation (timed operation or humidity target).

Humidistat

That brings us to another point of weakness in this unit’s design that’s worth bringing to your attention. The on-board humidistat is somewhat less accurate than you’ll find on many other models, and you’ll often note a discrepancy of up to 15% between what the machine is reporting and what your digital hygrometer is reporting. While that’s not ideal, it’s easy enough to plan around and compensate for once you get a feel for the unit.

Fill Sensor

Back to features, you’ll also find a fill sensor in the reservoir and an auto-shutoff feature that prevents messes in the event that your gravity drain gets fouled or clogged, or you’re not using it and not paying close attention to the fill level of the reservoir.

Filter

Finally, you’ll find a washable filter that helps purify the air in whatever space you place the unit. It’s not a great filter, but it will handle the basics well enough, and as we mentioned, it’s washable so you won’t have to spend money periodically to replace it if you give it a thorough rinse every couple of weeks.

Overall, we regard this unit as a good unit that sadly falls short of greatness. Even so, Ivation is a respected company with a good reputation, and if the other models we’ve mentioned in this section aren’t what you’re looking for, it’s an excellent fallback option. We provisionally recommend it.


Best Dehumidifier For Large Grow Tents Or Small/Medium Sized Grow Rooms

Best Dehumidifier For Large Grow Tents Or Small/Medium Grow Rooms

Best Dehumidifiers For Large Grow Tents - Honeywell 70 Pint Dehumidifier With Pump Small

​Honeywell 70 Pint Dehumidifier With Pump

Best Dehumidifiers For Large Grow Tents - Frigidaire 70 Pint Dehumidifier With Pump Small

Frigidaire 70 Pint Dehumidifier With Pump

Best Dehumidifiers For Large Grow Tents - Haier 70 Pint Dehumidifier With Pump Small

Haier 70 Pint Dehumidifier With Pump

Price

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Overall Rating

4.63