To cultivate plants, particularly cannabis, in an indoor environment, you must have nice-sized grow tents.
However, simply purchasing a grow tent isn’t enough. You need to have the right conditions in the tent for successful cultivation.
UPDATED Saturday, March 25th 2023:
After reviewing over 200+ dehumidifiers, our recommendation for the overall best grow tent dehumidifier is the hOmeLabs HME020031N Dehumidifier. In our testing, this model is the best value, most well-rounded on the market, and suitable for practically all uses. You can read 42,000 positive customer reviews here.
Best Dehumidifier for Grow Tent
- SEAVON Electric (Editor's Choice)
- Keystone KSTAD50B 50-Pint
- Frigidaire FFAD7033R1 Dehumidifier
- Pro Breeze Electric
- hOmelabs 70 Pint Dehumidifier
Achieving the best humidity levels is key. It is, therefore, imperative that you find a top dehumidifier for grow tent.
The Best Dehumidifier for Grow Tent
1. SEAVON Electric
The first best dehumidifier for grow tent products on our list comes from SEAVON. This compact device with a 500 ml maximum capacity processes approximately 250 ml of moist air daily and works best in small rooms and spaces. The dehumidifier’s optimal room size is 180 square feet.
The SEAVON Electric saves a lot of space, and its size makes it incredibly useful. You can move it around the house if needed, and you can even bring it with you to your grow rooms.
One of the great features of this smart dehumidifier is its auto shut-off function the moment it fills up with water. Its light turns red to let you know it needs emptying. You can easily remove the water tank, empty it, and put it back without problems.
The Built-in Thermo-Electric Cooling technology on this machine allows it to operate without a compressor, meaning you get but a whisper of sound as it works quietly in the background. That makes it perfect for small apartments, a unit, and even suitable in a bedroom for a good night’s rest.
While the SEAVON Electric works well for this size dehumidifier, it’s not the best choice for all environments. Its optimal operating temperature is between 59 and 86oF, and it will not work at temperatures below 41oF
- Auto shut-off function
- Easily to remove the water tank
- Easy to operate
- Incredibly quiet and efficient
- An excellent choice for small spaces
- Does not work in environments below 41oF
- Low capacity, only 250ml per 24 hours
2. Frigidaire FFAD7033R1
The second product in our list of best dehumidifiers for a grow tent comes from Frigidaire, a renowned consumer appliance brand that has been around for over a century. The craftsmanship and quality in their work come through once again in the FFAD7033R1 Dehumidifier with its high capacity of 70 pints per day.
The dehumidifier works round the clock, protecting your home from mildew and mold by drying out the air it processes. It also helps eliminate airborne bacteria that make breathing difficult, providing your home with cleaner and higher-quality air.
The most prominent feature of the Frigidaire dehumidifier is its Ready-Select electronic controls with a digital display readout that allows you to see the current level in your household. The effortless humidity control lets you adjust the amount of moisture with its straightforward controls. Also, this dehumidifier has a 24-hour on/off timer and control lock, giving you complete control of when and how it best operates.
The FFAD7033R1 Dehumidifier’s patented SpaceWise technology has a moveable design that includes a top handle, integrated side handles, and caster wheels, making it incredibly easy to move the machine from one room to another.
- It comes from a well-known brand, Frigidaire
- High-quality craftsmanship quality
- 70-pint per day capacity
- SpaceWise Moveable Design
- Effortless Control
- Easy to move
- Ready-Select Electronics Control
- The sensor can break after a few years, resulting in an “F0” readout error
- Shorter lifespan compared to other dehumidifiers on this list
3. Keystone KSTAD50B Energy Star 50-Pint Portable
The Keystone KSTAD50B Dehumidifier is perfect for someone who has a fairly large grow tent and wants to keep their best items, tools, and vehicles safe from rust, mold, and stale odors. This dehumidifier filters 50 pints of moisture per day in a space of up to 3,000 square feet (21000 cubic feet).
The KSTAD50B features electronic controls with an LED indicator display for easy use. The LED indicator display also shows a full alert to let you know if it’s time to empty the water tank, which you can also see via its transparent water level indicator. You don’t have to worry about the dehumidifier spilling, either, as it also has an automatic shutoff feature.
We consider the KSTAD50B one of the best grow tent dehumidifiers because it is Energy Star compliant, meaning it is an energy-efficient dehumidifier and saves on power, costing you and the environment less price to run compared to other dehumidifiers on the market. It also comes with an easy-clean dust filter, meaning you don’t have to keep replacing it. The clean-filter alert will notify you when it's time to wash that air filter to keep your machine from running on overdrive compensation.
- Energy Star certified
- Easy-to-use electronic controls and LED display
- Tank Alert System
- Drain hose outlet for continuous operation
- Filters up to 50 pints of moisture per day
- Automatic shutoff feature
- Washable Filter
- The dehumidifier does not turn off when the water storage is removed
- The water tank has to be emptied immediately – you can’t set it down because the bottom is not flat
4. Pro Breeze Electric Mini
Last but not least best dehumidifier on the list is no other than the Pro Breeze dehumidifier. If you have a fairly small grow tent, you need not buy the best 30-pint dehumidifier electrical appliance. If you have a space of around 220 sq ft (1540 cubic feet), then the Pro Breeze Electric mini dehumidifier is perfect for your needs.
This mini dehumidifier for grow tents removes up to 18 ounces of water per day with a 52-ounce water tank capacity. That means you can leave this mini-unit on its own for almost three days and let it protect your vehicles from rust, mold, and pests without emptying the tank. The auto shut-off feature will power down the dehumidifier if you’re away from home for longer than three days and cannot empty the tank.
The Built-in Thermo-Electric Cooling Technology, which uses the Peltier effect, allows the mini dehumidifier to run without a compressor. This provides whisper-quiet operation if you want to bring it to other sections of the house, such as the bedroom or the bathroom. It is also compact and lightweight if you want to bring it with you on your RV or caravan trip.
The optimal operating temperature for this mini dehumidifier is between 59 and 86°F, perfect for a small grow tent, RV, caravan, or even a closet.
- Mini-size, portable, and lightweight
- Removes 18 ounces of water moisture from the air per day
- Auto shut-off/ auto-restart feature during a power outage
- Peltier technology for whisper-quiet operation
- It does not work below temperatures of 41°F
- Not Energy Star Certified
5. Best dehumidifier for 4×4 grow tent
There's not a lot of square footage in a 4x4 grow tent, so finding the right dehumidifier for indoor growing (3) isn't easy. You want something compact and powerful but don't want to sacrifice quality or efficiency. Let's take a look at some options.
The most common type of dehumidifier used in grow tents are those with a built-in fan. These work great for smaller setups without room for a separate fan. They're cheap and simple to install. But they aren't very efficient because they blow air around.
A better option is to invest in a dehumidifier with a fan. This allows you to circulate air throughout the tent while keeping humidity levels low. A good one might cost $300-$400, depending on how much power it needs.
You'll probably want to consider investing in a bigger dehumidifier if you have a large setup. Most people buy a 35-pint model because it's big enough to handle a decent amount of growth without being too cumbersome. You can find models ranging up to 200 pints online.
But even if you go with a larger unit, place it somewhere out of sight. If you have a large setup and plan to keep it running 24/7, you'll want to position it near the ceiling. Otherwise, you'll run into issues like condensation dripping onto your plants.
You can also try placing it on a raised platform. This way, the canopy won't block airflow. If you do this, make sure you have a way to drain excess moisture.
6. Best dehumidifier for 5×5 grow tent
The best dehumidifier to buy for a 5×5 indoor grow tent (4) is the hOmeLab 4,500 square foot dehumidifier. This dehumidifier is ideal because it features a large interior volume, making it great for growing plants indoors. Additionally, the unit is designed to run continuously without having to turn it off manually.
7. Best dehumidifier for a 4×8 grow tent
The best dehumidifiers for growing marijuana are large enough to cover most of the area of a 4x8 grow tent. These units are usually around 50-100 pounds and can hold anywhere from 50-113 pints of water. They are generally used for indoor hydroponic gardens (5) because they are able to maintain a high level of humidity without causing mold growth. A smaller dehumidifier like the ones listed above might work fine for small indoor garden setups, but it won't keep up with the humid conditions of outdoor grows.
8. Other models we looked at
We also looked at the following best dehumidifiers for grow rooms that will surely control the moisture level by filtering large pints of water and collecting excess humidity (7) in our dehumidifier review rating:
Vremi 30-Pint Energy Star Dehumidifier, Inofia GA2 Portable Dehumidifier, Eva-dry EDV-1100 Electric Petite Dehumidifier, Eva-Dry E-500 Mini Dehumidifier, Inofia 30 Pint Small Dehumidifier, AUZKIN Compact Dehumidifier, VIVOSUN Dehumidifier, ALORAIR Dehumidifier, Frigidaire FAS504DWD Dehumidifier, Keystone 35 Pint Dehumidifier, Pohl Schmitt Electric Dehumidifiers, Letsport Upgraded 68oz Dehumidifier, and Ivation GDM30.
These grow tent dehumidifier products come with varying designs (e.g., compact design, sleek design, portable design) and different features that are energy efficient and are Energy Star certified, which is ideal for low power consumption.
Purchasing and trying out these grow tents will give you no worries since these perfect dehumidifiers come with a 1-year warranty or a longer warranty period.
One of the most important things you need to understand as indoor growers of cultivar cannabis (apart from things like led grow lights) or indoor gardening plants is that the best plants require constant water daily. When there is too much moisture in a grow tent, the plants (1) will use their leaves to absorb and remove excess moisture from the space around them. When the moister is low in a grow box, they absorb water through their roots instead.
Thus, having control of the best ideal moisture and humidity levels in your indoor grow tent with a high-capacity dehumidifier (other uses air conditioner) allows you the best control over your indoor growing plant's nutrient intake. Moreover, having the right levels (e.g., humidity and sunlight) in your grow tent improves the development of the cannabis plant, giving you strong, healthy, and leafy plants. Outside of benefiting the plants, controlling the moisture in the grow room with one of the best grow room dehumidifiers prevents problems such as mildew, bud root, and leaf rot.
White powdery mildew is one of the most common issues with growing cannabis in high-moister environments. This fungal disease is tricky to deal with as growing cannabis plants grow best in humid air environments. The good news is that a grow room dehumidifier, humidity control, and proper and optimal airflow in your grow tents are all you need to prevent this type of fungal growth and make a suitable environment.
The worst problem growers experience due to poor environmental management is bud root. The problem with bud rot is that it’s difficult to spot. You could end up harvesting your cannabis plants thinking you have the best healthy crop only to find that you have a useless batch of mildew and moldy buds. Make sure you purchase the best tent dehumidifier for grow room, ensure only the best outcomes, and don’t encounter this frustration.
Where to Place in Your Grow Area
Depending on the size of your grow tent area, either small or larger square feet, you’ll need to balance three aspects when considering the best placement of your dehumidifiers: efficiency, redundancy, and accessibility. Dehumidifier efficiency means you have to place your dehumidifier in a manner that covers all your plants consistently without wasting energy.
However, you also have to consider redundancy. Maintaining the best moisture in the grow area is paramount in cannabis cultivation; thus, you have to ensure that if one grow room dehumidifier fails, your other dehumidifier can take up the slack and handle the increased demand without affecting crop health.
Finally, you should ensure that your dehumidifier is accessible at all times. You need to check on them occasionally after installation to ensure they are working at their best.
What Should My Humidity Be During Flowering?
The humidity level measures how much water vapor the air is currently holding. There are varying ways to measure moisture, such as relative, specific, and absolute. As a grower, you’ll mostly be concerned with the grow room's relative humidity (RH).
Relative humidity level measures how much moisture is in the air compared to the maximum capacity of water that the air can hold at a certain temperature (2). The best RH for growing tents during the flowering stage of marijuana is 40-50%. If you want to produce more resin, with a dehumidifier, you can lower the excess moisture (8) even further, setting the humidity level to 40-45% during the last two weeks of flowering.
Is this Expensive to Run?
Knowing how much it costs to run a dehumidifier for a grow tent is important, especially since you’ll need a number of them depending on the size of the area. A standard model dehumidifier runs at around a power of 280 Watts per hour.
Let’s say that the current power rate in your square area is 15 cents per kW. At these conditions, a dehumidifier for grow tents costs roughly 4.2 cents in power per hour to run. If you run the dehumidifiers in your grow rooms for 24 hours, that’s roughly a dollar per 24 hours, up to $365 per year per dehumidifier. That’s why we recommend purchasing Energy Star-certified dehumidifiers as they cost less to run, less power, and less energy consumption for better energy efficiency and will save you a lot of money and energy bills over a long period.
What size dehumidifier do I need for my grow room?
This depends entirely on what kind of cannabis you're growing. For example, if you're growing Sativa strains, you'll likely need more humidity than growing Indica strains. The best thing to do here is to consult an expert who knows about growing cannabis.
How long does it take to dry out a grow tent?
It takes roughly ten days to dry out a grow tent completely. During this time, you should check the inside of the tent daily to ensure that the humidity has dropped below 60%. Once you've reached this point, you can start filling the tent again.
How often should I clean my grow tent?
Cleaning your grow tent will depend on the material it's made of. Some materials require cleaning less frequently than others. However, regardless of the material, you should always wipe down the walls and floors of your grow tent after each use.
Should the dehumidifier be inside grow tent?
When using a dehumidifier, it's important to remember that it shouldn't be placed directly inside your grow tent. Instead, you should put it outside or far away from your plants. You don't risk damaging them by exposing them to excessive heat.
Can you have too much airflow in a grow room?
Yes, you can have too much airflow in a grow room. Too much air movement can cause problems such as mold growth and plant stress. To avoid these issues, you should only allow one fan to blow through your grow tent. You should also ensure that there aren't any gaps between the sides of the tent and the wall.
How big of a room will a 70-pint dehumidifier cover?
A 70-pound dehumidifier will cover approximately 2,000 square feet. You can find that information online if you want to know how many square feet a specific amount of weight covers.
Wrapping It Up
This is just an introduction to what you need to know about dehumidifiers for your grow tent. We hope our handy guide provides you with the most vital information to balance moisture in your grow room. With a good dehumidifier, you can grow some truly amazing cannabis plants.
Table of Contents
Grow Tent Dehumidifier Reviews
- SEAVON Electric
- Keystone KSTAD50B 50-Pint Dehumidifier
- Frigidaire FFAD7033R1 Dehumidifier
- Pro Breeze Electric Mini Dehumidifier
- hOmelabs 70 Pint Mini Dehumidifier
How to Choose the Best Dehumidifier for Grow Tent
- Best Commercial Dehumidifier
- Best Crawl Space Dehumidifier
- Basement Dehumidifier
- Best Dehumidifier for Grow Tent