Best Humidifier for Grow Room 2020

Why do I need a humidifier for growing cannabis?

Cannabis plants require different levels of humidity at different stages of their growth cycle. This is why having an automated humidifier in your life will save you from a lot of stress and potential mistakes. For instance, at the start of their growth they are likely to need a level of between 40%-70% humidity, but when they start to flower the humidity needs to be at a stable 45%

A humidifier ensures that you can adjust the settings so that it delivers the right level of humidity at those all important growth stages. They really are an essential device when it comes to successful growing and a purchase you certainly will not regret making.
Humidity and Plants Growth
Going back to elementary science, do recall that plants inhale Carbon (IV) Oxide (CO2) and release Oxygen (O2). Plants use up the CO2 but release the O2 as a byproduct into the atmosphere during photosynthesis. In photosynthesis, as the plant absorbs CO2, it releases O2 and moisture.

During photosynthesis, when the temperature is high, and humidity is normal, stomata of leaves open for easy gaseous exchange. However, if the air loses its moisture and becomes too dry, the stomata are shut, and photosynthesis is reduced, hence plant growth also.

Another way in which plants release moisture into the atmosphere is during transpiration. When air is dry, plants transpire moisture more than when it is not. The rate of water loss is high with dry air.

During transpiration, when the air is dry or hot, transpiration rate becomes faster. Even if the growing medium has a quantum supply of water, the plant may still wilt and die if the humidity remains low. Moreso, if the air is very humid, the plant will not absorb water from the growing medium and thus reducing its fertilizer intake, which can lead to weak growth.

The rate of water loss through plants’ leaves is usually higher than the rate of absorption of water through the roots. This high absorption rate through the leaves can damage the plant tissue.

Plants can regulate water loss by closing their leaves stomata to reduce moisture loss when there is little water available. This stomata closing minimizes the moisture flow out of the plant. As the escape of water is restricted, intake of CO2 is too. This restriction process causes stress to the plant and can lead to wilting or death.

Dry air absorbs water from the environment and moisture from plants too absorbed. Water pulls out of the leaves faster than drawn through the roots. Moist air absorbs little water from the atmosphere. To solve the problem of dryness of the air, you need to humidify the air for your plants.

Plants survive under the right humidity. Under humid air, plants keep their stomata opened for easy gaseous exchange. Under these conditions, plants eliminate the stress of excessive water loss. In that wet condition, there is little water loss from the leaves.

Plants differ regarding their soil moisture and humidity requirement. While some survive under very dry, arid (desert-like) air plus little or no humidity others will not. Plants that retain water (i.e., low moisture) developed adaptive features to do so, e.g., such plants grow thick and waxy leaves for moisture retention.

Pure Enrichment MistAire: Best Rated Ultrasonic Cool Mist Humidifier

Highlighted Features

Super savior of electricity, as it runs on 120V only.
Runs for 16 hours without any break.
Perfect pick for grow tent or small grow room of up to 250 sq. ft.
No need to disassemble the water tank to refill.
Comes with glowing option for illuminating the area.
Sports a disc cleaning brush as well.
Product Overview

As the runner’s up to pick of today’s contest, we’ve decided to name something that’s just perfect for a grow tent or small grow room of up to 250 square feet of area size. Because, most of the non-commercial indoor growers grow inside this size of tents, and Pure Enrichment MistAire is that one model that they are in search for.

To put flesh on the skeleton of our decision, let’s explain the humidifying capacity in the first place. The electric humidifier has got a 120V and 50Hz power to turn the water into mist. And that is quite able to cover up an area of 250 square feet or smaller.

Ensuring a top-notch, uniform distribution of the mist is something where most of the brands struggle with. But this model from Pure enrichment is not one of them. There is an easy-to-direct nozzle that let you set the direction of it anyway. With that, you can defocus on the areas of your grow tent where the electrical equipment or lights are located.

Moving forward from the humidification to the usability, we get to have a way to fill 1.5-liter want tank. Unlike other models, you don’t have to entirely break the device down to separate the tank. Once it’s done, the assembly of the tank is hassle-free as well. In case you want to clean it anyway, it would take too much of effort.

Now come to the question of the longevity of the device. Well, the lasting period of Pure Enrichment MistAire is up to 16 hours. So, if you run it for an entire day-night cycle, you have to replace the water in the tank. But when it’s humidifying your little grow room, this maintenance task is worth the investment.


The PureGuardian humidifier comes with an Ultrasonic technology that is filter-free. This Ultrasonic technology silently distributes a pleasant mist that provides comfort from the stagnant air.

It fights mold and mildew from germinating on the surface of the water container. The water tank can accommodate 1 gallon of water. It can also produce around 3 gallons of output daily.

PureGuardian Humidifier can last up to 15-70 hours, and this depends on the setting and atmospheric conditions. It has a cord length of around 5 Feet. It has other features such as a night light and variable speed. It will best suit medium-sized houses. Get it on Amazon here:

Eco Farm Electric Ultrasonic Humidifier for Grow Room
Eco Farm Electric Ultrasonic Humidifier for Grow Room


Your grow room humidifier should keep your banks fresh on autopilot. That’s why it’s a great choice to go with the ECO FarmUltrasonic Humidifier. The rate of evapotranspiration of your indoor plants will decrease significantly with this unit.

This large capacity unit is engineered for indoor gardens of up to 400 square feet. It has a great mist output of around 270 milliliters per hour, and the tank may last up to 50 hours.

The humidifier works steadily, generating an almost silent frequency. This unit reduces airborne bacteria by retaining the relative humidity above 43%.

You don’t need to check the water level frequently because the humidifier will turn off automatically when it detects low water levels.

You don’t need expensive filters for this humidifier to operate optimally. The design is filter-free and works perfectly with tap water.

It has an easy to use analog control knob. You have to turn the knob clockwise for minimum mist setting, and anticlockwise for maximum mist setting.

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