Best Practices for a Successful Dehumidifier Drying Room

For cannabis cultivators, a crucial phase in the growth cycle is drying and curing the harvested buds. Proper drying is vital for achieving optimal potency, flavor, and fragrance. One crucial aspect of the cannabis drying is controlling moisture levels in the drying chamber. A dehumidifier can be invaluable in addressing excessive moisture, but it must be used correctly for optimal results.

This article provides five tips for using a dehumidifier effectively in your drying room, discussing the importance of dehumidifiers for cannabis growers during the drying process, the various types of dehumidifiers, and more.

dehumidifier drying room

Dehumidifiers and Cannabis Drying Rooms

A dehumidifier is a device that removes excess moisture from the air to achieve the humidity required for marijuana. Humidity refers to the amount of water vapor present in the atmosphere. Excessive humidity can lead to mold growth in crops and even heat and discomfort for growers.

Elevated humidity is a significant concern for cannabis cultivators. Cannabis plants require a specific humidity level for proper growth. However, excessive humidity can lead to mold development, potentially ruining an entire crop. Conversely, insufficient humidity can result in plants drying out and withering. This is where a dehumidifier plays a role.

Dehumidifiers pull damp air from the room and direct it through cooling coils. As the air cools, the moisture condenses and accumulates in a tank or drainage system. The now-dry air is then recirculated into the room. This process aids in lowering overall humidity levels in the space, facilitating the drying of wet areas and preventing mold formation.

What is Cannabis Drying Room

With the growing cannabis industry booming indoors, many growers are looking for ways to improve the growing process. For example, after initial cultivation to mature harvest, the harvested cannabis plants must be dried before finally being processed and sold on the market.

So, what exactly is a cannabis drying room? Simply put, it is a space dedicated to drying cannabis plants. These rooms are usually maintained at a specific temperature and humidity level, with airflow designed to help the plants dry evenly.

For cannabis growers, having a dedicated drying room can be a game-changer.Utilizing a dedicated drying room allows growers to closely manage the drying process, resulting in a superior-quality product. In addition, by maintaining appropriate temperature and humidity levels, cultivators can ensure consistent drying of their plants, preventing mold and other issues.

Moreover, a dedicated drying room enables growers to optimize space utilization. Drying plants require ample room for even drying, which can be challenging for growers with limited space. A dedicated drying room frees up space in the main cultivation area while ensuring proper drying of the plants.

A cannabis drying room is indispensable for any grower producing top-quality cannabis.

The Significance of Dehumidifier in Drying Room

Humidity is a vital factor during drying, as cannabis necessitates specific environmental conditions for optimal drying.

The ideal drying temperature for marijuana is around 60-72 degrees Fahrenheit and 45-60% relative humidity. A stand-alone dehumidifier helps regulate the humidity level in your cannabis drying room, which is important because too much humidity can cause mold and mildew to grow on the buds. Conversely, insufficient humidity can cause the buds to dry too rapidly, producing harsh and unpleasant odors.

The benefits of using a dehumidifier in a drying room include:

1. High humidity can lead to mold growth

Cannabis plants contain significant amounts of water, and improper drying can lead to mold growth. Mold and mildew can jeopardize an entire batch of plants, wasting growers' time and resources. A dehumidifier assists in maintaining ideal humidity levels, preventing the formation of mold and mildew.

2. A dehumidifier helps preserve terpenes

Terpenes are responsible for the distinct flavors and aromas unique to each cannabis strain. Unfortunately, environmental factors such as high humidity can easily compromise these delicate molecules. A dehumidifier aids in preserving terpenes, ensuring that the buds maintain their characteristic scent and taste.

3. Proper drying increases potency

Proper drying is critical to maximizing the potency of your cannabis buds. Buds that dry too quickly may lose strength due to insufficient chlorophyll degradation, while buds that dry too slowly may also lose power due to THC degradation. A dehumidifier helps maintain the perfect moisture level, ensuring the buds dry optimally.

4. Dehumidifiers speed up the drying process

Besides maintaining ideal moisture levels, a dehumidifier can expedite the drying process. The buds dry more rapidly by extracting surplus moisture from the air, allowing growers to transition to the curing process sooner.

5. Proper drying results in a consistent product

Consistency is crucial in the cannabis industry, and adequate drying helps guarantee uniform potency, flavor, and aroma across batches of buds. With a dehumidifier, growers can uphold optimal moisture levels, ensuring each group of buds dries perfectly.

6. Dehumidifiers help reduce energy costs

Excess moisture in the air can make it challenging to maintain a steady temperature in the drying chamber, resulting in increased energy costs as the HVAC system works harder to sustain the desired temperature. With a dehumidifier, growers can decrease energy costs by controlling humidity levels, enabling the HVAC system to function more efficiently.

7. A dehumidifier helps maintain the quality of the buds during storage

Once dried and cured, cannabis buds are typically stored to maintain their freshness. Excessive moisture in the air, however, can promote mold and mildew growth, potentially spoiling a batch of buds. A dehumidifier aids in preserving the quality of your buds during storage, ensuring they remain fresh and mold-free.

8. Enhancing growers' health through dehumidifiers

Elevated humidity can contribute to various health issues, such as allergies, asthma, and respiratory infections. With a dehumidifier, growers can establish a healthy environment and minimize the risk of these health concerns.

9. Improving growers' overall well-being with dehumidifiers

Except health advantages, dehumidifiers can also improve a grower's overall well-being. Creating a comfortable, healthy workspace allows growers to enjoy their work more, leading to heightened job satisfaction and a better quality of life.

10. Invest in a top-tier dehumidifier for optimal outcomes

For cannabis growers seeking the best results, investing in a high-quality dehumidifier is crucial. By selecting a top-notch dehumidifier, growers can maintain ideal moisture levels, protect terpenes, expedite the drying process, and achieve consistency, ultimately yielding a superior product that satisfies both growers and consumers.

Selecting the appropriate dehumidifier can be challenging for cannabis growers. To make an informed decision, it's essential to familiarize yourself with the different types of dehumidifiers available.

dehumidifier drying room

Types of Dehumidifiers

Dehumidifiers can be broadly categorized into two main types: refrigerant and desiccant. The primary distinction between these two types lies in their method of moisture removal.

Refrigerant dehumidifiers utilize refrigerant to cool the room's air, causing moisture to condense on the coils. In contrast, desiccant models employ rotating wheels or silicone-filled cartridges to absorb moisture.

It's worth noting that desiccant dehumidifiers are more energy-efficient in the long run; however, this depends on the desiccant wheel. Since these wheels absorb moisture, they have a limited lifespan and require regular replacement. Refrigerant dehumidifiers do not face this issue, as they do not contain consumable parts like desiccant wheels that need periodic replacement.

Additionally, desiccant dehumidifiers are solely designed for dehumidification purposes. If cooling functionality is needed, a cooling coil within the air handling unit (AHU) must be paired with the cooler. In contrast, heating functionality necessitates connecting the heating coil to the boiler. Furthermore, dehumidifiers only offer energy savings when used exclusively for dehumidification.

Still, consider the total energy consumption of cooling + heating + dehumidification. In that case, dehumidifiers may not save money because you need to consider the power consumption of chillers and boilers to achieve the target temperature and humidity.

A significant drawback of desiccant dehumidifiers in cannabis cultivation is that the initial investment, installation expenses, and maintenance costs are substantially higher than those associated with single refrigeration system dehumidifiers.

Ultimately, selecting a dehumidifier that best meets your requirements is paramount.

Here is a list of dehumidifier brands specially designed for cannabis grow rooms for your reference.

Several Dehumidifier Brands for Reference

Products of the following brands come with a warranty. This helps take any stress out of your investing. In addition, if anything goes wrong, they'll help fix it and get your environment back where it needs to be.

Quest Dehumidifier

Quest is undoubtedly the industry leader in horticultural dehumidification and the best dehumidifier brand. They set the gold standard in energy efficiency, durability, reliability, and flexibility. In addition, quest humidity control products come in various sizes and options, allowing you to customize and design the perfect environment for your industry's needs.

Drygair Dehumidifier

Reducing agricultural energy consumption is one of DryGair's core missions. DryGair's range of dehumidifiers offers growers the most efficient humidity solution, saving up to 50% in energy compared to other solutions.

You ensure ideal and uniform humidity levels, avoiding dew point condensation throughout the space and during extreme temperature dips and humidity spikes.

Altaqua Dehumidifier

The Altaqua dehumidifier is the ideal way to help with indoor humidity problems: strong cycle ability and high efficiency. In addition, easy controls create a happy and productive growing environment for your crops.

Anden Dehumidifier

Anden dehumidifiers help create an environment that optimizes transpiration while helping prevent disease outbreaks. As a result, it reaches peak power faster, maximizes moisture removal, and reduces humidity spikes.

Desert Aire Dehumidifier

Desert Aire's advanced dehumidification system provides complete climate control. In addition, it adds several key features, including discharge temperature management, dehumidification capacity regulation, and the ability to anticipate rapidly occurring changes in indoor grow rooms.

Each brand of dehumidifier has its advantages. The above brands are for reference only. There are still other excellent dehumidifier brands on the market.

Now, let's learn some tips for using a dehumidifier effectively in your cannabis drying room.

5 Tips for Using a Dehumidifier to Quickly Dry a Cannabis Room

Selecting the Right Dehumidifier Size 

The initial step in effectively drying a room with a dehumidifier is selecting the appropriate size for your space. A too small dehumidifier will struggle to manage the moisture, while an oversized one will waste energy and money. Therefore, it's essential to find the ideal dehumidifier for your cannabis drying room's dimensions.

Close All Windows and Doors

Before activating the dehumidifier, ensure all doors and windows are securely closed. This will prevent additional moisture from entering the room, allowing the dehumidifier to concentrate on removing the existing humidity. Sealing any cracks or gaps is also advisable to avoid air leaks. The more airtight the room, the more effective the dehumidifier will be at drying.

Position the Dehumidifier Correctly

The position of your dehumidifier is vital for optimal performance. Situate it in the middle of the drying room to optimize air circulation. Ensure at least 1 foot of space surrounds the dehumidifier for proper airflow. Also, avoid placing it near heat sources or direct sunlight, which could adversely affect its performance.

Empty the Water Tank Regularly

It's crucial to consistently empty the water tank when utilizing a dehumidifier. Depending on the tank's capacity and the room's humidity, you may need to empty it several times daily. If the water tank becomes overly full, the dehumidifier's effectiveness will be diminished and may even overflow. Therefore, habitually check and empty the water tank at least once daily.

Use Other Drying Methods with a Dehumidifier

While a dehumidifier is a powerful tool for drying a room, combining it with other methods can further enhance its effectiveness. For instance, using a fan to circulate air in the room can accelerate drying.


To sum up, whether it is a small or a large grower, it is necessary to invest in a dehumidifier. By choosing a top-of-the-line dehumidifier, growers can maintain ideal humidity levels, protect terpenes, speed up drying, and ensure consistency. Ultimately, growers can harvest a high-quality cannabis crop, and consumers can benefit from a high-quality product.


1.Does a dehumidifier help with dry rooms?

A dehumidifier doesn't help with dry rooms. Its function is to remove excess moisture from the air.

2.How long does it take for a room to dry out with a dehumidifier?

The time it takes for a room to dry out with a dehumidifier depends on the room's size and humidity level. It can take a few hours to several days.

3.Is it OK to leave a dehumidifier on overnight?

Yes, it's OK to leave a dehumidifier on overnight. However, make sure the water tank is empty before you do so to prevent overflow.

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