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10 Methods for Effective Commercial Grow Room Odor Control

Controlling the strong smell of cannabis in commercial grow rooms is a challenge many cultivators face. In this blog, we'll explore commercial grow room odor control, focusing on why it's essential and how to control those powerful smells effectively.

As the cannabis industry grows, controlling odors in commercial grow rooms is vital. Reasonable odor control helps you follow local rules, keep neighbors happy, and secure your business.

Therefore, we'll cover why cannabis has a distinct smell and the potential problems it can cause in this blog. Additionally, we'll also discuss different odor control methods. Using a mix of these methods and understanding local rules, your commercial grow room can run smoothly.

So, let's get started and make your grow room a pleasant-smelling success!

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What Causes Grow Room Smells?

The smell in grow rooms is primarily caused by terpenes produced by cannabis plants, which originate from the trichomes—resinous glands on the plant's surface. Terpenes play various roles in the plant's life, including attracting pollinators, repelling pests, and providing protection against environmental stress.

The unique scent of cannabis is a combination of different terpenes found in the plant. Even though terpenes are not harmful, they are classified as volatile organic compounds (VOCs) due to their quick evaporation and release of molecules into the air.

In some cases, the smell of the grow room can be detected as far as a mile away from its origin. While certain people enjoy the scent, it can create problems for growers and nearby communities and even contribute to pollution.

The Important of Commercial Grow Room Odor Control

Managing odors in grow rooms is crucial for various reasons, making it essential for every facility to establish and maintain an effective odor control system. Overlooking odors or relying on inadequate solutions can harm a facility's reputation and even lead to its closure.

Preventing Legal Penalties

Local authorities often set specific guidelines for cannabis grow rooms, including the requirement for odor control plans and, in some instances, zero odor emissions. Facilities that fail to comply with these stringent regulations may face fines, license revocation, or even facility shutdowns.

By prioritizing commercial grow room odor control, you can prevent potential legal issues and protect your business investment. Learn more about the legal matters surrounding cannabis here.

Maintaining Good Neighbor Relations

Although many growers may not be bothered by the smell of cannabis plants, neighboring businesses, and residents usually are. There is still a significant stigma surrounding odors among the general public, even in states where growing, selling, and consuming cannabis is legal. Complaints from nearby people may attract the attention of local governments, potentially resulting in fines or other penalties.

In recent years, a significant number of odor complaints in cities with legalized cannabis have been attributed to local cannabis growing operations. However, residents' tolerance may decrease as the number of facilities continues to increase.

Maintaining good neighbor relations is crucial for your business's reputation and success. By controlling odors effectively, you can prevent complaints and maintain a positive relationship with the surrounding community.

Addressing Evidence of Improper Setup

A musty smell or excessive odors in your grow room could signal improper setup and the need for climate adjustments. Plants in optimal growing conditions should produce fewer unpleasant odors. Poor ventilation, insufficient air circulation, excessively warm or humid conditions, and other factors can exacerbate grow room smells.

It is important to note that a properly set up grow room will still produce odors, as this is a natural result of cannabis growth. However, certain environmental factors can lead to an increase in malodor production.

Ensuring Privacy and Security

Odor control in commercial grow rooms is essential for maintaining privacy and security. Strong cannabis odors can draw unwanted attention, potentially increasing the risk of theft or vandalism. Implementing effective odor control measures can help keep your facility discreet and secure.

Creating a Comfortable and Healthy Work Environment

Staff working in commercial grow rooms might experience potent smells for long durations. Putting odor control measures in place establishes a pleasant work atmosphere and enhances the grow room's air quality.

This leads to higher productivity, increased employee contentment, and a healthier environment for both the plants and workers. In addition, improved air quality can result in better plant growth and a decreased likelihood of mold or other pollutants.

Ensuring Quality Control

Effective odor control is a crucial aspect of overall quality control in commercial grow rooms. By managing odors, you can maintain an environment that promotes healthy plant growth, reduces the risk of mold or pests, and ensures a high-quality product. A well-managed odor control system demonstrates your commitment to responsible cannabis cultivation practices.

10 Methods for Effective Commercial Grow Room Odor Control

There are several methods for controlling cannabis odor, which can be employed individually or in combination, depending on the size and location of your cultivation facility:

Carbon Filter or Scrubbers

Carbon filters, also known as carbon scrubbers, are a popular choice for commercial grow room odor control.

Carbon filters use activated carbon to trap and neutralize odors as air passes through them. The porous nature of activated carbon allows it to attract and hold odor molecules, effectively eliminating them from the air.

Growers need to determine the number of carbon filters required based on the size of their grow room. However, it is important to have a carbon filter on each exhaust to prevent odors from escaping the indoor grow space.


Ozone Generators

Ozone generators produce ozone (O3) by breaking down oxygen molecules (O2) using electricity. Ozone is highly reactive and breaks down odor molecules upon contact, neutralizing them.

Ozone generators can effectively neutralize strong odors, and they work quickly. However, ozone can be harmful to humans and plants at high concentrations, so proper use and monitoring are essential.

Air Scrubbers

Air scrubbers use a combination of filters (including carbon filters and HEPA filters) and fans to clean the air of odors and contaminants. The air is pulled through these filters, trapping and neutralizing odors before releasing the purified air back into the room or venting it outdoors.

These devices are efficient at removing a wide array of contaminants and smell. However, they can be costly and necessitate regular filter replacements and upkeep.

Odor Neutralizers

Odor neutralizers employ chemical compounds or natural enzymes to break down and neutralize odor-causing molecules, making them odorless. They can be used in the form of sprays and gels or integrated into air filtration systems.

It's essential to choose a safe and suitable product for your growing room since some odor-neutralizers may contain chemicals harmful to plants or people.

Air Purifiers

Air purifiers serve as another option for controlling odors in grow rooms, particularly in commercial environments. These devices not only eliminate odors but also filter out dust, microorganisms, and other particles, providing clean and odor-free air.

Despite their effectiveness, air purifiers can be expensive. Since they offer more than just odor removal, they might not be the top choice for some growers. Moreover, specific air purifiers may not effectively neutralize the strong odors produced by indoor plants.


Ultraviolet (UV) Germicidal Irradiation

Ultraviolet Germicidal Irradiation (UVGI) is a modern method used to manage odors in cannabis grow rooms. This technology uses UV light to help break down odors and reduce microorganisms, such as mold and bacteria, that contribute to unpleasant smells, creating a fresh environment for plants and workers.

Our company's HVAC systems offer an option to include UVGI technology, providing a comprehensive solution for climate control and odor management in your grow room. Combining our advanced HVAC systems with UVGI ensures your facility maintains the ideal temperature, humidity, and air quality.

After exploring various odor control equipment and solutions, let's examine some supplementary strategies that can further improve your grow room's odor management.

Negative Air Pressure

By maintaining negative air pressure in your cultivation facility, you can prevent odors from escaping into the surrounding environment. This is achieved when the exhaust system removes more air than is being introduced, causing air to flow into the facility rather than out.

Keep the Humidity in the Optimal Range

Controlling humidity is crucial for indoor grow rooms, as high humidity can negatively impact plant health. An uncontrolled humid environment can promote the growth of mold, mildew, and other microorganisms, leading to unhealthy plants.

When humidity and temperature aren't properly managed, plants tend to produce more odors. For effective odor control, regulating humidity is essential.

With Altaqua's HVAC products, you can precisely manage humidity precisely and create a balanced grow room environment, ensuring optimal plant health and reduced odors.

Control the Air Extraction and Exhaust

To effectively control odors in a cannabis grow room, it's essential to focus on air extraction and exhaust management. Implement a well-designed ventilation system that promotes efficient air circulation and odor removal.

Utilize intake and exhaust fans that are appropriately sized for your grow room, and keep the fans, ducting, and filters in good condition through regular maintenance.

Proper ventilation

Ensuring proper airflow and ventilation in your cultivation facility is crucial for odor management. This includes using exhaust fans, air filters, and maintaining appropriate air exchange rates.

Maintaining a clean grow room involves regularly removing dead plant material, sanitizing surfaces, and properly disposing of waste. Good hygiene practices help prevent the buildup of odor-causing bacteria, mold, and other contaminants.

Role of HVAC in Grow Room Odor Control

HVAC systems play a vital role in managing to grow room odor, as they help regulate temperature, humidity, and air circulation. Properly maintained HVAC systems can significantly reduce unwanted smells and create a healthier environment for both plants and workers.

High temperatures and humidity can be harmful to your plants and contribute to increased odors. Altaqua's HVAC systems allow you to manage these factors precisely, ensuring a balanced grow room environment.

In addition to temperature and humidity control, Altaqua's HVAC systems offer the option of UV germicidal lamps. When added to your HVAC setup, these lamps can help mitigate odor-causing bacteria and other contaminants, improving your grow room's air quality.

Let Us Help You Find the Right Odor Control Solution

However, finding the right odor control solution can be challenging, as each grow room has its unique requirements.

Let us help you find the perfect odor control solution tailored to your grow room's specific needs. With our expertise in HVAC and odor control methods, we can guide you in selecting the most effective and efficient approach to ensure a pleasant and productive grow room environment.

Don't hesitate to contact us for personalized assistance and expert guidance on all aspects of grow room odor control.


1. What is the best odor control for cannabis?

The most effective cannabis odor control depends on your grow room size and needs. Combining methods like carbon filters, air scrubbers, ozone generators, odor neutralizers, air purifiers, and proper ventilation usually works best. Also, using HVAC systems to maintain ideal temperature and humidity levels can help with odor control.

2. What filters cannabis odor?

Carbon filters are the top choice for filtering cannabis odor. They capture odor molecules in the activated carbon, which has a porous structure that absorbs and neutralizes odors. As air flows through the filter, odorous compounds are trapped, and clean air is released.

3. Does drying cannabis make the room smell?

Yes, drying cannabis can cause room odor. The process releases terpenes and other compounds that create a strong smell. To minimize the odor, ensure good ventilation and use odor control methods like carbon filters, air scrubbers, or odor neutralizers during drying.

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