Dehumidifiers

While a certain level of humidity is desirable for greenhouses or indoor gardens, too much humidity can lead to serious problems for your plants. Dehumidifiers are used to dehumidify the air in grow spaces and facilities, including cultivation environments, to maintain optimal conditions.

Dehumidification is essential to prevent mold and maintain high-quality yields. Reliable dehumidifiers help control temperature and humidity, allowing plants to flourish and optimizing the growing environment. Energy-efficient dehumidifiers can help reduce operational costs while maintaining ideal conditions.

If you are experiencing excess moisture in your grow room, you will need a dehumidifier, as proper dehumidification helps maintain a healthy grow space and prevents issues that can impact plant quality.

What is a dehumidifier?

Similar to how humidifiers raise the humidity, grow room dehumidifiers lower the humidity by removing moisture from the air when it gets out of the ideal range. There are several types of dehumidifiers used in grow rooms, each with different abilities and features to optimize the process of moisture removal and maintain stable relative humidity.

Whole-room and commercial dehumidifiers are pieces of equipment and machinery designed to handle large volumes of air. Their powerful blowers ensure proper airflow and uniform relative humidity throughout the space, supporting healthy plant growth. Portable dehumidifiers are ideal for smaller grow spaces and can be easily integrated with other equipment, such as fans and air conditioners to enhance environmental control.

The exact dehumidification process and capacity needed depends on several factors, including the amount of moisture plants produce, the size of the grow space, the density of plant matter, and the overall environmental and design conditions present in the room. Proper selection and integration of dehumidification equipment are essential for maintaining optimal airflow, preventing condensation, and ensuring consistent growing conditions.

When humidity is too high, it can result in the dreaded bud rot and other molds forming. Too much humidity will also slow growth to a halt.

Types of Dehumidifiers

When it comes to keeping your grow room free from excess moisture and maintaining ideal humidity levels, choosing the right type of dehumidifier is crucial. High humidity levels can quickly lead to issues like mold, mildew, and powdery mildew, which can devastate your plants and reduce yields. Fortunately, there are several types of dehumidifiers designed to tackle these challenges in different grow room environments.

Refrigerant (Compressor-Based) Dehumidifiers: These are the most common dehumidifiers used in grow rooms. They work by drawing humid air over cold coils, causing moisture to condense and collect in a reservoir. Refrigerant dehumidifiers are highly effective at removing large amounts of moisture from the air, making them ideal for rooms with consistently high humidity levels. They’re a popular choice for both small and large grow spaces where excess moisture is a constant concern.

Desiccant Dehumidifiers: Desiccant models use a moisture-absorbing material to pull humidity from the air. Unlike refrigerant units, they don’t rely on temperature differences, so they perform well in cooler environments where compressor-based units might struggle. Desiccant dehumidifiers are especially useful in grow rooms that experience lower temperatures or need precise humidity control to prevent mildew and mold.

Industrial and Commercial Dehumidifiers: For larger grow rooms, greenhouses, or commercial facilities, whole-room or commercial dehumidifiers are engineered to handle significant volumes of air and moisture. These powerful units are capable of maintaining stable humidity levels across expansive spaces, helping to prevent the spread of powdery mildew and mold throughout your entire operation. They’re often integrated into environmental control systems for maximum efficiency.

Portable Dehumidifiers: If you’re working with a small grow room or tent, portable dehumidifiers offer flexibility and convenience. These compact units are easy to move and set up wherever excess moisture is an issue. While they may not have the capacity of larger models, they’re perfect for targeting specific areas and keeping humidity in check to protect your plants from mildew and mold.

By understanding the different types of dehumidifiers available, you can select the best option to keep your grow room’s humidity levels in the ideal range, ensuring a healthy, productive growing environment and preventing the problems that come with high humidity levels.

What should the humidity be in a grow room?

Plants should be grown under different humidity conditions depending on which stage of their life they are in. Seedlings and clones require high humidity levels of 70-75%. As the plant begins vegging, slowly lower this until you reach humidity of 50-70%. During flowering, lower humidity further to 40-50% and try and keep it within this range through harvest.

While all indoor operations will benefit from a dehumidifier, they are especially essential for hydroponic systems. Portable dehumidifiers are ideal for small grow rooms or grow tents. Proper ventilation will help control humidity levels as well, so be sure to implement a fan or blower.

What size dehumidifier do I need?

Dehumidifiers are sized according to how many pints they can remove a day. To determine the exact size of grow room dehumidifier required for your space, consider factors such as plant transpiration rates, climate conditions, and the total area to be dehumidified. Follow this simple equation:

If you are still unsure which dehumidifier is right for you, check out our full guide on how to size your dehumidifier. After you know your sizing recommendation, you can read our list of the best grow room dehumidifiers of the year. We truly have a unit for every grow on that list!

At Hydrobuilder we have portable dehumidifiers for hobby farmers with small grow rooms, and commercial dehumidifiers capable of removing moisture from a large greenhouse or warehouse grow. Customers can also take advantage of sale prices and quick view sale price options to easily compare and shop for the best deal on dehumidifiers.

If you want to learn more about creating an ideal environment for your plants, check out some of our learning center articles. If you still have questions, give one of our experienced growers a call today at 888-815-9763!

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