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What is a Dry Cooler and How to Choose the Right One

As a cannabis grower, having the appropriate tools and equipment in your grow room is vital for a successful harvest. One indispensable piece of equipment is the dry cooler. Dry coolers offer an efficient cooling solution for cannabis and commercial grow rooms.

Suppose your grow room needs to purchase a dry cooler. In that case, it's crucial to grasp the various types and features available before selecting the one that best suits your needs. This blog will supply the information required to decide on your dry cooler needs.

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Understand the Basics of Dry Coolers

As more states and countries have legalized cannabis use, cannabis cultivation has experienced significant expansion. With both demand and supply on the rise, the quality and quantity of cannabis have become essential for success. Humidity, temperature, and air circulation are critical in any cannabis grow room.

However, attaining and sustaining optimal conditions can be challenging, especially when using high-intensity discharge (HID) lighting that produces considerable heat. This is where understanding the fundamentals of dry coolers becomes critical.

What is a Dry Cooler, and How Does it Function?

A dry cooler, sometimes called an air-cooled cooler, uses air to cool the heated refrigerant, then cycles back to the cooler to chill the water or solution that manages the grow room's temperature. While it functions differently from traditional water-cooled chillers, dry coolers offer an effective solution for commercial growers seeking a reliable, cost-efficient, low-maintenance system. For cannabis cultivators, dry coolers are crucial in managing temperature and humidity within the grow room.

Benefits of Dry Coolers

Temperature control is critical for cannabis cultivation, affecting the plant's growth and development. Moreover, dry coolers help maintain consistent temperature and humidity levels in your grow room, which are vital for a successful harvest.

A dry cooler is an ideal solution for cannabis growers operating in environments with high moisture levels in the air. These coolers prevent water, mold, and bacteria buildup in the atmosphere. They also help keep plants from forming dew, so your plants will grow healthier and more robust.

Commercial growers also benefit from dry coolers. They give you cost savings and environmental friendliness compared to water cooling systems, which consume more energy and are more expensive. The versatility of dry coolers can also be used for cooling equipment or large rooms. This makes it an excellent choice for commercial grow rooms.

Dry Coolers Advantages vs. Traditional Chillers

Compared with traditional water chillers, dry coolers have several advantages.

1. Energy efficiency

Dry coolers consume significantly less energy than traditional coolers. This is because dry coolers use air as the cooling medium instead of water. This means you won't have to spend as much on your electricity bills to maintain an optimal climate in your grow room so a dry cooler can save you a fortune over time.

2. No water consumption

Conventional chillers necessitate a continuous water supply to function correctly. This can challenge cannabis growers in regions where water is scarce or costly. On the other hand, dry coolers do not require water, making them a more eco-friendly option.

3. Easy to install

Dry coolers are relatively simple to install, especially compared to traditional chillers. They take up less space and require no plumbing. You can easily set up your grow room and start the production process.

4. Low maintenance

Dry coolers require minimal maintenance. They have fewer moving parts than traditional chillers, meaning fewer parts that can fail or wear out. So you can spend less time and money on repairs and maintenance.

5. Environmental protection

As mentioned earlier, dry coolers consume no water, making them a more sustainable option. They also generate less heat than traditional chillers, not contributing to air pollution or global warming.

6. Greater flexibility

Dry coolers provide enhanced flexibility when it comes to positioning grow chambers. Since they don't require water lines, you can set up your grow room in the location that best meets your requirements.

If you're considering establishing a grow room, dry coolers are a valuable alternative to traditional chillers for your cooling needs.

Determine Your Cooling Requirements

The first step in choosing the suitable dry cooler for your cooling needs is determining your specific requirements. Identifying your needs is the first step in selecting the suitable dry cooler for your cooling requirements. Factors to consider include:

  • The amount of heat to be removed.
  • The temperature of the process or system being cooled.
  • The ambient temperature of the surrounding environment.

Make precise calculations for these factors to obtain accurate data, which will help you select the proper dry cooler size and configuration. You can also consult a professional in the field to assist with the final decision.

Please refer to the following factors to influence your determination of cooling requirements:

Factors that Affect the Temperature of Cannabis Grow Room

Before determining cooling requirements, you must understand the factors that affect the temperature of the cannabis grow room.

These factors include lighting, humidity, and air circulation. Lights generate heat and raise the temperature in the grow room. High humidity levels also increase the temperature and create a warm, humid environment perfect for harmful microorganisms to grow.

Proper air circulation helps to control temperature and humidity and improve the overall environment of the growth chamber.

Determine the Ideal Temperature

Cannabis plants grow best in temperatures between 65 and 80 degrees Fahrenheit during the day and slightly cooler temperatures between 60 and 70 degrees Fahrenheit at night. The ideal temperature depends on the strain you are growing.

So, before deciding on your cooling requirements, research the ideal temperature requirements for the cannabis strain you are growing.

Assess the Size of the Grow Room

Grow room size is critical when determining your cooling requirements. The larger the room, the more cooling capacity is needed to maintain an optimal temperature. Therefore, assess the size of your grow room and consider investing in a bigger or more powerful air conditioning unit if necessary.

Calculate Heat Load

Heat load refers to the amount of heat that needs to be removed from the grow room to maintain an ideal temperature. Consider the number of plants, lighting wattage, and ventilation system when estimating heat load. You can use an online calculator to help accurately determine your heat load.

Consider the Location and Environment Installation

The installation location of dry coolers is crucial for cannabis growers. Dry coolers are a critical component of a cannabis grow room as they help to regulate the room's temperature. A well-installed dry cooler will help to ensure that the cannabis plants thrive and that the dry air produced during drying is controlled.

Conversely, a poorly installed dry cooler may lead to several problems, such as moisture buildup and the growth of molds and fungi, which may cause significant losses.

Cannabis growers should consider positioning the dry coolers in a separate room, away from the grow room. This will help to prevent unnecessary clutter in the grow room, which may hinder plant growth.

Additionally, the way location will ensure the dry coolers work efficiently, free from any cross-contamination from the plants' respiration process.

The Environment of Dry Coolers for Cannabis Growers

The dry coolers' environment is as crucial as the installation location. The right environment will ensure that the dry coolers work efficiently and are not damaged quickly. Conversely, an unsuitable climate can result in dry cooler malfunctions, leading to considerable losses.

Adequate ventilation guarantees sufficient airflow, minimizing the risk of heat accumulation that could cause the dry coolers to become overloaded. Besides, cannabis growers should consider using filters on the dry coolers to prevent the collection of debris that may cause blockage in the coils.

Furthermore, cannabis growers should consider the temperature and humidity levels of the installation environment. Dry coolers operate optimally under a specific range of temperatures and humidity levels. As such, cannabis growers should ensure the installation environment is consistently maintained within the right temperature and humidity levels for the dry coolers.

Dry Coolers for Commercial Grow Room

For commercial and small-scale cannabis growers, the installation location and environment of dry coolers are equally important. The primary distinction, however, lies in the scale of the operation. For example, commercial cannabis growers might require extensive dry cooler installations to regulate the temperature and humidity within their grow rooms.

The appropriate dry cooler type is crucial for efficient performance in a commercial grow room. The choice of the dry cooler will be influenced by factors such as grow room size, desired temperature range, and environmental humidity levels. As such, commercial cannabis growers should consult with professionals to determine the best dry cooler.

Finally, choosing the right location and environment for the dry coolers is critical for cannabis growers. A well-installed drying cooler operating in the right environment will promote the healthy growth of the cannabis plant and ensure that the dry air produced during the drying process is adequately regulated.

Conversely, improperly installed dry coolers operating in inappropriate environments can cause significant losses to cannabis growers. Therefore, cannabis growers must take the time to choose the right location and background for their dry coolers.

Choose the right size and capacity.

When choosing a dry cooler of the right size and capacity for the cannabis grow room, it is essential to consider the size and power that best meets your cooling needs.

Size of the Grow Room

The size of your grow room is the first factor to consider when determining the appropriate size and capacity for your dry cooler. This directly affects the cooling capacity needed to maintain ideal temperature and humidity levels.

Number of Plants

Another aspect to consider is the number of plants in your grow room. A more significant number of plants will necessitate a greater cooling capacity than fewer plants.

Required Temperature and Humidity Range

The temperature and humidity range required for optimal cannabis growth will also impact the size and capacity of your dry cooler. For example, you must maintain a lower temperature range with higher humidity. In that case, you will need a larger cooler than if you only need to keep a higher temperature range.

Types of Lights Used

The type of lights used in your grow room can also impact the size and capacity of your dry cooler. For example, LED lights generate less heat than high-pressure sodium (HPS) lights, so growers using LED lights may require a smaller cooler.

Energy Efficiency

When selecting a dry cooler, it's essential to consider energy efficiency.

Search for models with high energy efficiency ratings, such as those that comply with the ENERGY STAR® standards. These models use less energy to achieve the same cooling level, resulting in substantial cost savings over time.

In addition, variable speed fans and controls are considered for more precise temperature regulation, which also helps reduce energy consumption. Choosing an energy-efficient dry cooler can save on operating costs and reduce your environmental impact.

Noise Level

If your grow room is located in a residential area or near other businesses, the noise level of your dry cooler could become an issue. Therefore, consider the noise level of your cooler when making your selection.

Maintenance Requirements

All equipment necessitates maintenance, so it's vital to consider your dry cooler's upkeep requirements. Opt for models that are easy to clean and maintain to ensure the equipment's longevity.

Available Space

The amount of available space in your grow room will also impact the size of your dry cooler. Be sure to measure the area where you plan to install your cooler before selecting it.


Lastly, your budget will also impact your dry cooler selection. Compare prices and features to find a model that fulfills your needs and aligns with your budget. Considering these factors, you can find a dry cooler that meets your requirements and assists you in maximizing your cannabis yield and quality.


In conclusion, understanding dry coolers can help determine if they are the optimal solution for your commercial grow room or cannabis cultivation business. They present an efficient method for controlling temperature and humidity levels, lowering energy costs, and minimizing our carbon footprint. To help increase the production of cannabis growing rooms. By performing regular maintenance, choosing the right brand, and working with a professional installer, you will ensure that your system continues functioning for years.


1. What is the purpose of a dry cooler?

A dry cooler's purpose is to remove heat from a fluid by passing it over a heat exchanger. This cooled fluid is then circulated back to cool equipment or processes.

2. What is the difference between a dry cooler and a condenser?

The difference between a dry cooler and a condenser: a dry cooler cools fluids through air circulation, while a condenser cools by changing a substance from its gas to liquid form.

3. What is the difference between dry cooler and air cooled?

A dry cooler cools a fluid by air circulation over a heat exchanger. An air-cooled system, like an air conditioner, removes heat from the air directly using a refrigeration cycle.

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