When growing cannabis in a grow room, it’s easy to think that you got everything right since you’ve tested the soil, used the right nutrients, and have some of the best grow lights. Many people forget about one crucial factor to ensure the plant grows healthy: the humidity of the room!
You see, cannabis plants usually requite different levels of humidity, from one stage to another. At the start, they usually require a level between 40% and 70% humidity. When they begin to flower, the levels change to a stable 45%. This simply means you need to control the humidity, sometimes getting rid of extra humidity in the air, and sometimes adding more to reach the required amounts.
So, how do you make this happen? Simple — Get the best humidifier or dehumidifiers for grow rooms. A humidifier will help you get more humidity for your plants, while a dehumidifier will reduce the levels to the right amounts to nurture your herbs. Pick several machines from the reviewed options depending on the size of your grow room and grow marijuana like a pro!
- Best Humidifiers for Grow Rooms
- Levoit LV600HH Hybrid Ultrasonic Humidifier
- LEVOIT Cool Mist 4.5L Ultrasonic Humidifier
- Holmes Cool Mist Comfort Humidifier HM1865-NU
- PureGuardian H920BL Ultrasonic Cool Mist Humidifier
- TaoTronics Cool Mist Humidifier 4L Ultrasonic Humidifiers
- OPOLAR Digital Humidifier 3L/0.8 Gallon Ultrasonic Cool Mist House Humidifier
- WILLHI WH1436H Mini Plug-n-play Digital Air Humidity Controller
- Best Dehumidifiers for Grow Room
- Pro Breeze Electric Mini Dehumidifier Compact and Portable for High Humidity
- Hysure Portable Dehumidifier
- Afloia Electric Portable Dehumidifier 700ml Capacity
- Vremi 30 Pint Energy Star Dehumidifier
- HeHui-DG 24 oz Water Tank Mini Electric Dehumidifiers
- Powilling 5500 Cubic Feet Smart Home Dehumidifier
- Inofia 30 Pints Dehumidifier Mid-Size Portable
- hOmeLabs 50 Pint Energy Star Dehumidifier
- Keystone KSTAD50B Energy Star 50-Pint Portable Dehumidifier
- Choosing the Best Humidifier/Dehumidifier For Grow Room – The Ultimate Buying Guide
Let’s start our list with best humidifiers:
Best Humidifiers for Grow Rooms
Levoit LV600HH Hybrid Ultrasonic Humidifier
Levoit Humidifiers, the most automated cool and warm humidifiers, are the ideal solution to all large space humidification. They are designed with a 6 Liters tank that will take 24 hours before the next refill. The powerful mechanism features an ultrasonic system that ensures continuous humidification.
With three levels for you to select, Levoit Humidifier will increase the cool mist humidity level in your space by 25% faster than other devices. The digital display gives you the exact reading and features accurate readings. The touch control panel is highly sensitive and comes with a remote for alternative and convenient setup.
And you don’t have to be worried about bacteria and spreading to your grow room. Water in the internal tank can be heated to extreme temperatures that will call all the bacteria. Refill and cleaning of the Levoit is easy and convenient given the wide opening of the tank.
- Up to 24 hours usage with the large water tank
- Convenient two-way control
- Automatic shut-off function
- Quite hectic to use the handle due to the reservoir’s vents
- Takes up more space
- May form white mist on glass surfaces
LEVOIT Cool Mist 4.5L Ultrasonic Humidifier
LEVOIT Cool Mist 4.5L Ultrasonic features an economic power utilization and longer humidifying time. The 4.5L offers your growing room up to 4 hours of undisrupted continuous mist at the low setting. With maximum output moisture of up to 300ml per hour, your growing room will attain optimum humidity within a few minutes.
The operation of the Cool Mist 4.5L features 3 mist levels operated at just one touch control option. The inbuilt tank has a 3-inch opening wide enough to refill and avoid water spillage. And when the water levels go low, the humidifier will turn off automatically.
Additionally, this LEVOIT Cool Mist 4.5L Ultrasonic Humidifier has a mist output direction that can turn up to 360 degrees. It can be used in most spaces, including the growing room.
- Easy to operate with single button operation
- Exceptionally long hours of operation
- Easy to clean and refill
- No filter to prevent debris from accumulating
- Quite heavy to move around
- No display of the current humidity
Holmes Cool Mist Comfort Humidifier HM1865-NU
Imagine having a humidifier with a programmable timer to turn on and off- that’s what the Holmes Cool Mist Comfort Humidifier offers you. With a tank that can take in 1.5 gallons, this humidifier will perfectly serve your growing room for up to 48 hours nonstop.
For ease and convenience use, this machine comes with a 3-step programmable timer. A digital LCD that is operated digitally allows most persons to operate the HM1865-NU continently. And for guaranteed safety of your growing room, The Holmes Cool Mist Comfort Humidifier HM1865-NU comes with a pre-treated filter that will further ensure a hygienic environment.
This humidifier is very portable for use in the growing room. Holmes Cool Mist Comfort uses an HWF65 C replacement filter which gives the humidifier a long life. Cleaning and refilling are very easy, given that the water refill tank is transparent.
- Very easy to clean and refill
- 2 days uninterrupted runtime
- Great coverage for the growing area space
- Replacement filters are quite pricey
- Has no water indicator and might cause a fire when it runs low of water
PureGuardian H920BL Ultrasonic Cool Mist Humidifier
The PureGuardian H920BL is the most recommended humidifier when it comes to mobility and size. Weighing 0.5kg and 10.8 inches height, this humidifier is your perfect solution when you want to humidify different parts of your growing room. You only need a shelf or small table for the part of the growing room.
The design of the PureGuardian H920BL Ultrasonic Cool Mist Humidifier incorporates Silver Clean Technology which makes it mist and mold resistant. You have two mist selection options of low and high, depending on how humid you want your grow room to be. Additionally, this humidifier is energy efficient and will save you from crazy power bills.
A low water indicator ensures that you get an alert when the water levels go low. The PureGuardian H920BL will save you maintenance time as it doesn’t have evaporating pads, wicks, or filters to replace or wash. For your daily usage, you only need to refill it twice a day. To refill, take out the water container and unscrew the fill cover, fill it with water, and put back the cover.
- Simple sleek design that is light and portable
- Comes with a refill indicator
- Saves the power as it only consumes 12W
- Only suitable for small growing rooms
- Has only 2 control options
- Does not come with a carrying handle
TaoTronics Cool Mist Humidifier 4L Ultrasonic Humidifiers
When it comes to large spaces and efficiency, the TaoTronics Cool Mist Humidifier, 4L Ultrasonic Humidifiers is your answer. This ultrasonic humidifier will work in growing rooms measuring up to 30 meters. The water tank holds an impressive 4 liters of water that can last up to 30 hours.
This cool machine features an informative cool LED display that provides all the information you need. An inbuilt Humidistat allows you to know the humidity of the growing room. The TT-AH001 features three different mist levels that you could choose from and set the desired humidity for the growing room. The TaoTronics Cool Mist Humidifier is found on Amazon in color white.
The safety of this machine is enhanced with an automatic shut down option when the water tank runs low. With the Microporous filter cartridge, no microorganisms will pass to your growing room and contaminate your plants or lead to bad odor in the room
- The tank is easy to clean and refill
- Perfect informative LED display
- Convenient for larger rooms
- Will consume more water when set at high humidity configuration
- Quite heavy
- May leak water with time
OPOLAR Digital Humidifier 3L/0.8 Gallon Ultrasonic Cool Mist House Humidifier
The OPOLAR Digital Humidifier House Humidifier is here to save the time that you have to keep going to the growing room to check on the humidity. This device features an inbuilt system that allows you to set the ideal range of humidity you need in the room and. It switches on and off at the set intervals automatically!
With a mist output of 300ml/h, be assured of stronger and faster humidifying in growing rooms of up to 300-500 square feet. Additionally, a sensitive LED touch display allows you to control the desired level, the amount of time, and the current humidity in the room. With a 3 liters tank, the humidifier will serve you for up to 26 hours.
The front nozzles give a 360-degree mist output for your growing room, thus ensuring even humidity in the room. The maintenance of this unit is made easy as its filter-free making it more cost-effective.
- Three-level mist output options
- Automatic start for set humidity levels in the growing room
- Sleek design with touch LED panel
- May leak water over time
- Quite small for large rooms
- PureGuardian H1250 Ultrasonic Cool Mist Humidifier
When you think of extended mist emission life, think about The PureGuardian H1250 Ultrasonic Cool Mist Humidifier. With a tank capacity of 1.5 gallons, this humidifier will last up to 100 hours in your growing room. The ultrasonic technology allows the H1250 to dispense fine mist into the growing room.
With the PureGuardian H1250, an inbuilt mist sensor will smartly monitor humidity levels in the room and adjust accordingly based on your needs. The tank features Silver Clean Protection ethnology that prevents mildew on tank’s surface and slimy mold.
For ease of operation, a digital display with 3-speed controls allows you to set it to the exact units you set for the growing room. On the display, you can be able to monitor when to add water in the tank as an indicator goes on upon water levels going low.
- Extended mist dispense time of up to 4 days
- Very pocket-friendly
- Easy to operate
- Not recommended for large rooms
- The bottlebrush will not reach all the parts to be cleaned
- Quite noisy
WILLHI WH1436H Mini Plug-n-play Digital Air Humidity Controller
The WILLHI WH1436H Mini Humidity Controller is one device you need in your growing for accurate interval humidity control in your growing room. The device is a simple plug and play device; where you set the temperature at a desired and let it automatically turn on and off the humidifiers in the growing room.
This version offers a total solution for the growing room with the absolute ability to handle large power inputs with a large interval control. The sensor probe is enhanced for accuracy and is also waterproof.
The power control of the WILLHI WH1436H Mini Humidity Controller can handle up to a maximum load of 1100W at 110V or 2200W at 220V. The LCD allows you to set the exact humidity level and monitor as it adjusts itself.
- Easy to use and operate
- Highly accurate and handles most power loads
- Will not lose memory even when the power goes off
- The user manual is quite small to read
- Quite pricey
- The sensor tends to die with time
Best Dehumidifiers for Grow Room
Pro Breeze Electric Mini Dehumidifier Compact and Portable for High Humidity
The Pro Breeze Electric Mini Dehumidifier tops the list when it comes to portability in the growing room. The 22cm machine weighs only 1kg and can be placed on any corner of the growing room. It’s built with the advanced Peltier design technology that is very energy efficient.
With a tank capacity of 18 ounces, The Pro Breeze Electric Mini Dehumidifier will extract up to 9 ounces of water every day from the growing space. And what’s more; an automatic shut off feature that will shut down once the tank gets full enhancing safety and convenience.
This appliance is easy to use and clean. When the water tank is full, pull it out from the dehumidifier and pour the water. In the alternative, an easy pour water outlet in the tank lets the water flow from it conveniently.
- Highly portable and very lightweight
- Energy efficient
- Easy to use
- Not ideal for large rooms
- No display for current humidity readings
- May not operate where temperatures are below 59° Fahrenheit
- hOmeLabs Small Space Dehumidifier
hOmeLabs Small Space Dehumidifier is the most ideal option when you intend to keep your growing room purified while keeping the electric bills low. Designed with the Thermoelectric Peltier Module that has no compressor, the efficiency of the hOmeLabs Small Space Dehumidifier will impress you into great lengths.
Additionally, this machine measures 8.5’’ by 6.5’’ which makes it very mobile within the growing room. The tank capacity is 16 ounces and will take in take in up to 9 ounces of moisture every day from the growing room. This mini device can dehumidify spaces of up to 150 ft² with minimum effort.
Additionally, when the water tank gets full, the automatic switch turns off the device, and this enhances safety in the growing room. The removable grill makes it very easy to clean and ensure it lasts long enough.
- Very energy efficient
- Highly portable
- Easy to clean and maintain
- Only ideal for small spaces
- No option to drain out continuously
Hysure Portable Dehumidifier
Hysure Portable Dehumidifier was created knowing that you may need to rid off bacteria and dust in your space in addition to moisture. The wind inlet will allow such particles to pass through and ensure that high levels of hygiene are maintained in the growing room.
An elegant and compact design ensures that you can place the dehumidifier anywhere in the growing room that may need clean air. The tank capacity takes in up to 700ml of water while the device absorbs up to 300ml from the area it has been set in. Hysure Portable Dehumidifier is available on Amazon in white and black colors.
The operation of the Hysure Portable Dehumidifier is very easy as it features one-button control and will shut down once the tank is full of water. For enhanced environmental care, ABS plastic is used to make the dehumidifier.
- Absorbs moisture, dust, and bacteria from the growing room
- Made from ABS plastic that is energy efficient
- Comes with a 24-month warranty
- May heat up if used for extended periods
- Ideal for spaces of only 215²ft
- Needs more time to dry the growing room
Afloia Electric Portable Dehumidifier 700ml Capacity
If water from the growing plants tends to accumulate on the walls of the growing room, then the Afloia Electric Portable Dehumidifier is your answer. It can eliminate all the condensation on the windows and walls of the growing room.
The efficiency of this application allows quick dehumidifying, absorbing up to 350 ml per day at an environment with 80% humidity. With the latest Peltier Technology, The Afloia Electric Portable will most definitely reduce the excessive moisture in the plantation and save energy.
Equipped with a DC adapter that shuts off when the reservoir gets full, the safety of this piece of equipment is unmatched. Sleek compact and convenient size ensure the minimum space is taken up in your growing room. The device comes with life support for 2 years of free parts replacement.
- Fast absorbing moisture from the walls and the atmosphere
- Automatic power off option
- Easy to operate
- Ideal for small spaces only
- A bit heavy to move around
- Needs regular checking and changing of parts
Vremi 30 Pint Energy Star Dehumidifier
Have a large growing room that needs dehumidifying? The Vremi 30 Pint Energy Star Dehumidifier is your answer. This device will rid off up to 4 gallons of moisture from the growing room in a day. In addition, the Vremi 30 Pint Energy Star is known to absorb the moisture quickly at minimum energy consumption.
Vremi dehumidifier comes with a very easy to use a panel that allows you to set it for turbo function that works quickly to dehumidify your room. With a continuous draining function, a drain hose that is purchased separately allows you to have the comfort of having the device run for as long as you want without having to empty the drain tank.
Moving the Vremi 30 might be a bit problematic. However, the designers included wheels and a handle that allows you to move it conveniently at minimum effort. It can also remove all odors and particles that may affect your plantation.
- Ideal for medium and large spaces
- Continuous draining option
- Easy to use and operate
- Requires that you purchase the drainpipe separately
- Quite pricey
- Emits more heat when operating at Turbo mode
HeHui-DG 24 oz Water Tank Mini Electric Dehumidifiers
The Hehui-DG Dehumidifier is designed for those of us who love sleek and compact efficient devices. This machine is made from the safest ABS plastic materials, measures 8.9×5.9×14.6 inches and weighs 4.8 pounds only, making it a very portable device for your growing room.
The Hehui-DG Dehumidifier has a large water tank that can take up to 2000ml of water. When the tank is full, an automatic LED light signals and turns off the dehumidifier which enhances the safety of the growing room. To operate, a simple button at the top makes the Hehui-DG very easy to control.
With this dehumidifier, 26 ounces of water can be removed from growing rooms of up to 2000 cubic feet. The hidden flat handle enhances portability. The replaceable filter will extend the life of the dehumidifier to great lengths. In addition to absorbing the excess moisture, this little monster will rid of all the pollen and odors from the growing room!
- Very portable
- Made of ABS plastic that is environment friend
- Rids of moisture, smells and pollen
- Only ideal for small spaces
- No continuous drainage option
- Single-button operation option can be hard to operate
Powilling 5500 Cubic Feet Smart Home Dehumidifier
Powilling Smart Dehumidifier separates itself from the others in a special way- it allows you to set the humidity you desire for your space. And in case of a blackout, the dehumidifier proves its smartness by not losing the set parameters. It has a 5500 cubic feet capacity that is ideal for medium-sized rooms.
The tank capacity of this smart machine is 3000ml, which needs emptying every two days. Additionally, a continuous operation pipe for draining is provided for which will reduce the amount of time that you need to keep going back to empty it. The operation of the Powilling Smart Dehumidifier is digital and incorporates an inbuilt hygrometer to help you regulate the humidity in the growing room.
The compact and sleek design comes with a grip that makes sure installation and carrying is easy. In adapting to modern technology, the moving parts in The Powilling Smart Dehumidifier have been minimized, by incorporating Thermoelectric to remove water from the growing room.
- Continuous mode of operating for extended operation periods
- The water tank is easy to remove and refill
- Modern Thermoelectric technology that saves energy
- Takes long to start to dehumidify
- Inbuilt hygrometer may not be that accurate
- Only ideal for medium spaces
Inofia 30 Pints Dehumidifier Mid-Size Portable
Inofia 30 Pints Dehumidifier Mid-Size Portable features the most intelligent dehumidifiers among the featured devices. The intelligent time control panel features a 24 hour set up to dehumidify. An alarming function beeps once the reserve tank is full for extra security in the growing room.
This Inofia 30 Pints Dehumidifier Mid-Size, as the name implies will work in growing areas of up to 1056 sq ft. It comes with an inbuilt water tank of up to 1.8L. For continuous drainage, a screw stopper is affixed at the rear which can be replaced with a 1.1m drain pipe that comes with the unit.
The operation of this equipment is as easy as ABC. With only 4 dedicated specific buttons, you have the luxury of regulating the time and humidity levels in your growing room with ease. You will not have to worry about moving the dehydrator around the house as a handle at the rear ensures ease of movement of the device.
- Smart intelligent technology for ease of control
- Comes with a continuous drain option and drain pipe
- Allows you to regulate the humidity for up to 24 hours
- Not ideal for large growing rooms
- The drain bucket is relatively smaller
hOmeLabs 50 Pint Energy Star Dehumidifier
Having a device that can handle large growing rooms efficiently can be summarized with one statement- The hOmeLabs 50 Pint Energy Star Dehumidifier. This gadget is designed for rooms measuring up to 1000-2500 ft² and will leave your growing room as desired.
The effectiveness of this Energy star is incorporated in the operation panel. The touch panel comes with a touch panel that can defrost, restart, auto-shut, and turns on turbo mode by a simple touch. And to set it up, turn off the continuous mode and adjust the dehumidifying left/right button to the desired humidity levels.
The Turbo mode increases the fan speed that maximizes moisture reduction at a faster rate. And what’s more- the panel features a mesh cleaner option that turns on when you need to remove debris on the filter. With the hOmeLabs 50 Pint Energy Star Dehumidifier, all threats of mold in the growing room are eliminated.
- Ideal for large growing areas
- Easy to use and operate
- Eliminates moisture and foul smell
- Consumes more power
- Quite heavy to lift
- Emits more heat
Keystone KSTAD50B Energy Star 50-Pint Portable Dehumidifier
Having the Keystone KSTAD50B Energy Star 50-Pint Portable Dehumidifier means maximum performance at minimum energy consumption. This equipment consumes 520 watts at 4.7A, which is quite efficient for large spaces.
It is designed to operate in spaces measuring 3000 sq ft and will take in 50 pints of water daily. Given the large space it handles, the device comes with a large drain bucket that can be substituted with a continuous drain horse.
The easy to use LED display control with a 24-hour timer lets you program the device accordingly. A water level indicator helps you monitor water in the tank and empty accordingly. Settings are saved automatically even when there is a power outage.
- Energy efficient
- Ideal for large rooms
- Easy to maintain and clean
- Does not come with a continuous drainage hose
- Quite bulky to carry around
Choosing the Best Humidifier/Dehumidifier For Grow Room – The Ultimate Buying Guide
To be successful at the growing of weed, you need a humidifier. This is a device that adds moisture to a grow tent. It removes the dry air and makes the grow tent moist enough for growing weed. In addition to a humidifier, an indoor weed grower needs a dehumidifier. Its work is to remove excess moisture from the grow box or tent to prevent the plants from being damaged. When left to accumulate, too much moisture leads to the growth of mildew, mold, and may even cause plant diseases.
The following are questions to ask yourself when shopping for a humidifier/dehumidifier:
Does Room Need More Ventilation?
Just like the weed-grown outdoors, the one grown indoors needs just the right ventilation. One of the most important factors is humidity. But remember; however much you need humidity in the room, it shouldn’t be excessive. A room with inadequate ventilation will have too much moisture and requires a dehumidifier. It will suck out the excess moisture and leave your weed plants with a great environment to grow in. However, if the ventilation is adequate, only a humidifier would be enough.
How Big Is Your Room?
The type of humidifier/dehumidifier you buy will depend on the size of your room. If your room is small, a big enough humidifier will do the trick. For a big room, you may require a large appliance with the ability to moisten the room without breaking up. The good thing is that you will find humidifiers of all types and sizes befitting all kinds of grow rooms. For you to have healthy weed plants, buy the right kind of humidifier.
What Type Of Humidifier Do You want?
There are different types of humidifiers, including the warm mist and cool mist models. Both of these have the ability to provide the right amount of humidity in your weed grow tent, room, or box. What makes them different are their prices and features. So, the type of humidifier you settle for will depend on your personal preferences.
You may also want to choose a humidifier based on the runtime. Make sure the runtime is clearly stated. The most common runtimes for humidifiers are 12 hours, 24 hours, and may even go up to 70 hours. Depending on your needs, buy a humidifier with the right runtime.
Does It Have A Control Timer?
You always run the risk of over-humidification when you have a humidifier in your grow room. If it has a timer, you will be able to control how long your weed crops get supplied with moisture. When the set time comes, the humidifier will stop. This function is important, especially if you always forget or are not always there to watch over it.
Is the Humidifier/Dehumidifier Easy To Use?
Some humidifiers are easy to use to the extent of being suitable for first-time weed growers. These are a must-have. After all, why should you buy a humidifier that you just can’t figure out how to use? Check the design and other features of the device. Ensure you have a humidifier that’s easy to assemble, clean, and move around. It should have easy to operate buttons and a screen that indicates the levels of humidity. Also, it should be possible to control the fan speed.
Will It Be Easy To Clean?
Who wants the frustration that comes with a difficult to clean humidifier? The unit you buy should be easy to clean to ensure it only emits safe and clean moisture. When badly cleaned, a humidifier may release unclean moisture and emissions, which might harm the weed plants. Leaving your humidifier too dirty may result in the unit breaking down all the time.
Does It Have A Humidistat For Auto Shut-Off?
To ensure the humidifier automatically stops when the desired levels of moisture are reached, or the water lank gets empty, some units are equipped with humidistats. This ensures that you do not get to over-humidify your weed plants.
How Much Can You Pay For It?
The humidifiers on the market are available for different prices. New weed growers tend to prefer the most affordable humidifiers. However, there are real fears that cheaper models may not be up to the task. But that’s not to say that all expensive units are great to buy. The thing with cheap models is that they may end up costing a lot of money to maintain. That’s why it is important to balance between your budget and the features of a humidifier. Where possible, compare several models within the price range you can afford and pick only the best.
Clearly, you need the right humidifiers/dehumidifier for the growth of your weed plants. As you set up the grow room, plan for space where you will put the humidifier. No matter the size of your room, you should be able to find the right humidifier for your needs from the reviewed options. Your weed plants will grow naturally and provide you with abundant harvest in due course.