Recent advancements in smart technology have enabled HVAC equipment serving the indoor agriculture industry to optimize the conditions for crop growth. Grow rooms now can anticipate load changes and find the right balance between humidity and energy. Using cloud-based technologies, growers and HVAC technicians can take advantage of sensors to monitor humidity, carbon dioxide, light, and more.

Looking ahead, advancements in the HVAC side of indoor agriculture technology will only increase the ability to provide the hyper-precise control necessary for profitable crops.

Get Smart

Much of the advancement in this market can be attributed to the growth of the cannabis industry. The widespread legalization of marijuana and the cash it has generated has led to more money being poured into the market, creating the environment for equipment to be developed with more optimal control in mind.

“When indoor agriculture was in its infancy, proper HVACD systems did not exist to handle the unique and highly variable loads the application generates,” said Chip Seidel, controlled environment agriculture (CEA) brand manager, Desert Aire LLC. (The D in HVACD stands for dehumidification.)

That isn’t the case today.

“The CEA industry now has the resources to invest in better space conditioning equipment and the means to properly control it,” said Dan Dettmers, senior application engineer at Quest Climate.

Manufacturers have heavily invested in understanding indoor agriculture in order to develop these systems that help grow rooms thrive.

The state of Arkansas currently has five medical marijuana cultivation facilities. Delta Medical Canniabis Co. in Newport, Natural State Wellness Enterprises, also in Newport, Natural State Medicinals Cultivation between Redfield and White Hall, Osage Creek Cultivation near Berryville and the BOLD Team in Cotton Plant.

From a smart HVAC standpoint, that’s something equipment is able to do now that it once wasn’t. Another advancement is the ability growers now have to meet or change the off coil temperature, resulting in more effective control of humidity without consuming more energy than necessary.

There has to be the right balance between moisture removal and energy consumption, and smarter equipment today can achieve that.

Equipment today has also been developed to be smart enough to plan ahead for those abrupt load changes it’ll have to handle.

Cloud-Based

Since hyper-precise control of grow rooms is ideal, real-time, cloud-based control platforms — especially those that can track multiple variables and multiple rooms — have become an important feature of the grow industry, especially considering how many pieces of HVAC equipment is needed to maintain the perfect conditions.

Whatever the smart control system, the type most beneficial to growers will be simple and able to provide easy to understand feedback on the conditions of the room.

Benefits for All

While cloud-based systems are not all created equal, highly functioning systems might allow for technicians to reduce downtime through giving them the ability to perform diagnostics on differing parts of the system remotely.

This led companies to design a new generation of equipment to monitor filter life, increase fans speed to offset a loaded filter, and notify the HVAC technician when the filter needs to be changed.

“Output from equipment like this helps the technician maintain the space conditioning equipment in optimal shape for the CEA operation,” Dettmers said.

What benefits the technician ultimately benefits the grower, too.

“It gives [growers] more precise conditions if we’re able to anticipate load changes, and also better able to maintain the equipment and make sure it’s operating the way it should,” said Rodeghier.

Growers are able to not only increase yields but also control energy consumption with purpose-built integrated HVACD systems with cloud-based control systems.

Improving

Looking forward, Rodeghier thinks there is still opportunity for growth with energy monitoring and how to reduce energy consumptions. While that information may already be provided, many growers may not be using it as effectively as they could.

Water, along with energy, plays a big role in the future the smarter technology and indoor agriculture.

“Both have a substantial impact on the profitability and sustainability of the sector,” Seidel said. “Many existing facilities are looking to upgrade their aging, inefficient, and hard-to-control equipment with purpose-built equipment controlled via cloud-based systems to bring all aspects of the grow operation together in one system, in an effort to improve their yields and reduce costs.”

And there’s opportunity for water and HVAC controls to work together.

“Under-watering is detrimental to survival of a plant, but over-watering adds humidity to the space and wastes a precious resource,” Dettmers said. “The next generation of smart control systems will monitor light levels to adjust watering rates, which will then adjust the HVAC system to only remove the water necessary to maintain optimal conditions.”

Something else manufacturers are already working on, Daikin included, is to include predictive analytics.

“In that case, the system has built-in fault protection and can make recommendations for any predictive maintenance, which might include what condition the air filters are in, if the cooling coil is getting dirty, anything that will keep the system up and running as efficiently as possible that the system can check and do some diagnostics … and alert the person ahead of time if they see any unusual conditions,” Rodeghier said.