Why is there a need for more advanced heatstroke prevention measures now?

Due to rising temperatures in recent years, the risk of heatstroke is increasing year by year in indoor work environments such as factories, warehouses, and logistics centers. In particular, ensuring worker safety is a major operational challenge in areas where air conditioning is inadequate or around high-temperature equipment. Furthermore, the revised Industrial Safety and Health Regulations, which came into effect in June 2025, require employers to identify workers at risk of heatstroke early and to establish appropriate response systems. Measures that rely solely on "warnings" and "rules of thumb" are insufficient; more planned and objective risk management is necessary.

However, in reality, many situations rely on methods such as monitoring with thermometers or checking through site patrols, and it cannot be said that risks are always accurately grasped. In such situations, dangerous environments may be overlooked, or responses may be delayed. What is needed for future heatstroke prevention measures is a "management system" that quantitatively grasps the environment on site, assesses risks, and connects them to necessary countermeasures. It is important not only to implement countermeasures, but also to create a system that can continuously control risks.

Why can't we judge the risk of heatstroke based on temperature alone?

In heatstroke prevention measures, "temperature" is commonly used as a means of understanding the environment at the work site. However, the risk of heatstroke in an actual work environment cannot be accurately assessed by temperature alone. Even at the same temperature, high humidity hinders thermoregulation through sweating, making it easier for heat to build up in the body. In addition, in factories and warehouses, the heat emitted from furnaces, pipes, walls, etc., can make it feel hotter than the air temperature suggests.

Thus, the heat load experienced by workers is determined by multiple factors, including not only "temperature" but also "humidity" and "radiant heat." Therefore, the WBGT (Wet Bulb Globe Temperature) index is used as an indicator to comprehensively evaluate these factors.
WBGT is an index that reflects the effects of temperature, humidity, and radiant heat, and is widely used as a standard for evaluating the risk of heatstroke. In particular, in indoor work environments, the impact of radiant heat from equipment and buildings is significant, so understanding WBGT is important. In other words, what is important in heatstroke prevention is not "measuring the temperature," but correctly evaluating "the heat (heat load) for the worker." This way of thinking is a major difference from conventional temperature management.

Heatstroke prevention depends on "visualization, judgment, and response."

To make heatstroke prevention measures effective, it is essential not only to measure the environment but also to use that information to make appropriate judgments and take appropriate actions.

The important thing is to establish the following three processes:
Visualization: Quantitatively assess the heat level of the work environment using metrics such as WBGT and radiant heat.
- Judgment: Evaluate the level of heatstroke risk based on the established criteria.
・Response: Depending on the risk, appropriate measures will be taken, such as adjusting work schedules or instructing employees to take breaks.

Only when this entire process functions continuously can the risk of heatstroke be controlled. In other words, what is needed for future heatstroke countermeasures is not the implementation of individual measures, but a system that can operate "visualization, judgment, and response" as an integrated whole.

AiryQonnect: Making heatstroke risk "manageable"

To make heatstroke prevention measures effective, a system is needed that can reliably implement the "visualization, judgment, and response" process on-site. AiryQonnect combines sensors, communication, and the cloud to provide a foundation for continuously monitoring the working environment and making heatstroke risk "manageable."

■ Visualizing invisible heat (WBGT and radiant heat)
AiryQonnect quantitatively assesses the heat level of a work environment by combining multiple factors such as temperature, humidity, WBGT, and radiant heat. This allows for the visualization of environmental differences and risk imbalances that could not be captured by conventional temperature management, clearly indicating the level of heatstroke risk in each area.

■ Remotely assess the situation on site
The acquired environmental data is aggregated in the cloud and can be viewed centrally on a dashboard. This allows administrators to understand the status of multiple areas and locations in real time without having to be stationed on-site, enabling operations that do not rely on patrols or individual checks.

■ Real-time detection and notification of dangers
Based on pre-set thresholds, if the risk of heatstroke increases, alert notifications and warning lights can be activated to alert the work site. This allows workers and managers to quickly recognize the danger and take appropriate action, such as instructing breaks or adjusting workloads.

■ Supporting organizational safety management
Environmental data and alert history are recorded and stored, allowing them to be used for later review and improvement activities. Furthermore, by understanding heatstroke risk and visualizing response history, it is possible to strengthen safety management systems and standardize operations with a view to legal compliance.

In this way, AiryQonnect not only understands the environment but also integrates decision-making and response, enabling continuous control of heatstroke risk.

System configurations and application scenarios for preventing heatstroke

AiryQonnect's heatstroke prevention measures are achieved by integrating everything from acquiring environmental data via sensors to cloud-based management and on-site notifications. This section explains the basic system configuration and the types of situations in which it can be used.

■ Acquisition of environmental data using sensors
The RHS-2400 indoor radiant heat sensor manufactured by Watty, installed in the work area, acquires heat environment data such as temperature, humidity, WBGT, and radiant heat. This allows for continuous monitoring of conditions in areas where air conditioning is ineffective or around heat sources, where the risk of heatstroke is high.
*For detailed sensor specifications, please see below.

■ Centralized management via communication and cloud
The acquired data is transmitted to the cloud via a Bluetooth router or similar device and centrally managed on a dashboard. This allows for the integrated viewing of information from multiple sensors, as well as the understanding of environmental conditions across different locations.

■ Risk assessment and notification based on threshold settings
On the cloud, the risk of heatstroke can be automatically determined by pre-setting baseline values for indicators such as WBGT. If the set baseline values are exceeded, the system can alert on-site personnel and managers through alert notifications and warning lights.

Usage scene

This solution can be used primarily in indoor work environments such as the following:
• Work environment management in factory manufacturing sites
Monitoring of heat-related risks in warehouses and logistics centers
• Prioritizing safety management around high-temperature equipment
- Improving the environment in areas where air conditioning is ineffective.
- Centralized situation assessment across multiple locations

In addition to these, it can also be applied in the following environments:
- Management of the work environment in the back rooms of commercial facilities
- Understanding the heat environment in schools, gymnasiums, public facilities, etc.

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