Facility managers today carry significant responsibility for ensuring safe building operations, protecting occupants and maintaining compliance with evolving safety regulations.
In restaurants, stadiums, beverage facilities, breweries, and large entertainment venues, one risk that often goes unnoticed is carbon dioxide (CO2) buildup from compressed gas systems.
Carbon dioxide is widely used in commercial environments for beverage carbonation, draft beer systems and bulk liquid gas storage. And, while these systems are essential for operations, they also introduce potential safety hazards if a potential leak ever where to occur. As awareness grows around gas safety risks, many facility managers are implementing CO2 safety monitors and alarms to meet fire code requirements and protect employees, customers, and first responders.
Understanding how to properly deploy CO2 safety monitoring systems has become a key part of modern facility safety programs.
Why CO2 Safety Monitoring Matters for Facilities
Carbon dioxide is colorless, odorless, and heavier than air, which means it can accumulate in low-lying or enclosed areas such as walk-in coolers, storage rooms, mechanical spaces or basements.
In facilities using bulk CO2 storage tanks or high-pressure gas cylinders, leaks can displace oxygen and create dangerous environments before occupants are aware of the problem.
For facility managers, the challenge is twofold:
• Protect building occupants and employees
• Ensure compliance with local fire codes and safety standards
This is why many jurisdictions now recommend or require CO2 safety alarms in facilities using compressed gas systems. These monitoring systems provide continuous detection and trigger alerts when gas levels exceed safe thresholds.
Fire Responders Depend on Gas Safety Measures
A critical but often overlooked aspect of gas safety is the role of emergency responders.
During safety training sessions conducted with fire departments and inspectors, many first responders emphasized that one of the biggest challenges during emergency response is unknown hazards inside a building.
A report from the National Firefighter Near-Miss Program, published by the International Association of Fire Chiefs, highlights how dangerous these situations can be.
In one incident, firefighters responded to what appeared to be a routine medical call at a restaurant. Upon entering the building, responders reported dizziness and unusual symptoms. Investigation later revealed that carbon dioxide had leaked from a beverage system and displaced oxygen inside the facility.
According to the report:
"The oxygen concentration inside the building measured only 19.2%, below normal atmospheric levels."
"Because the facility had not properly identified the hazard or implemented gas monitoring protections, emergency personnel were exposed to the dangerous environment before the source was identified."
"Situations like this demonstrate why CO2 safety monitoring and hazard signage are essential for facility compliance and emergency preparedness."
You can read the full report here.
While the driver was fortunate in this instance, it was only because of a combination of luck and the well-trained emergency first responders.
The owners and managers of this facility should have worked with their gas supplier to post the appropriate signage they could not have conceived of or trained for this incident. The only way to have thwarted the incident would be to have purchased and installed a CO2 safety monitor to measure for elevated levels of gas per the fire code.
Real Incidents Highlight the Importance of CO2 Monitoring
Several tragic incidents across the United States have demonstrated the dangers of CO2 exposure when proper gas safety monitoring systems are not installed.
Examples include:
• A woman in Georgia was found unconscious in a bathroom after a disconnected CO2 line caused gas buildup in the area. Several individuals required hospitalization.
• A special effects technician in Tennessee died after a malfunctioning effects machine released carbon dioxide into the theater environment.
• A restaurant employee and a gas delivery driver both died after attempting to assist each other during a CO2 leak incident.
• A draft beer technician at a professional sports stadium collapsed while working near a beverage dispensing system.
These incidents highlight the importance of implementing CO2 safety alarms and monitoring systems in facilities where compressed gas is used or stored.
Why CO2 use has increased in Restaurants
Over the past decade, many businesses have transitioned from individual gas cylinders to bulk liquid CO2 storage systems.
Bulk storage offers several operational benefits:
• Reduced labor from fewer cylinder changes
• Lower gas delivery costs
• Greater capacity for high-volume beverage systems
• More consistent carbonation supply for large venues
However, larger storage volumes also increase the potential impact of a leak if proper monitoring systems are not installed.
For facility managers responsible for compliance, this makes CO2 gas safety systems a critical part of risk management and safety planning.
Key Steps Facility Managers Use to Improve CO2 Safety Compliance
To reduce the risk of CO2 exposure incidents, facility managers are implementing several best practices.
1. Professional Installation of CO2 Systems
Bulk gas systems should always be installed by qualified contractors or certified gas suppliers experienced in compressed gas equipment installation.
Proper installation ensures gas lines, regulators, and storage tanks meet safety standards and operate correctly.
Routine inspection and maintenance of gas systems can also help prevent leaks before they occur.
2. Clear CO2 Safety Signage and Hazard Identification
Facilities using compressed gas systems should install CO2 hazard signage and safety placards near storage areas.
Signage helps inform employees and emergency responders about potential hazards within the building.
Many facilities also install NFPA 704 diamond placards, which identify hazards related to health, flammability, and chemical instability.
These visual indicators provide first responders with immediate safety information when entering a facility during an emergency.
3. Employee Training and Emergency Procedures
Training is an essential part of any facility safety program.
Employees working around gas storage systems should understand:
• How CO2 safety alarms function
• What alarm signals indicate
• Emergency evacuation procedures
• Proper response during a gas leak event
Some organizations also conduct safety drills to ensure employees understand how to respond quickly if a gas alarm is triggered.
4. Installing CO2 Safety Alarms and Monitoring Systems
One of the most effective ways to prevent CO2 exposure incidents is by installing CO2 storage safety alarms and monitoring systems.
These systems continuously measure carbon dioxide levels in the surrounding environment and activate audible and visual alarms if concentrations exceed safe limits.
For example, CO2 monitoring systems may include alarm thresholds such as:
• 5,000ppm – OSHA time-weighted average exposure limit
• 1.5% CO2 – Early warning level
• 3% CO2 – High concentration alarm
Many modern monitoring systems can also activate ventilation systems or send alerts to facility management or monitoring services.
Supporting a Safer Facility and Restaurant Environment
For facility managers responsible for safety compliance, installing CO2 safety monitors and alarms is a proactive step toward protecting both occupants and emergency responders.
Gas monitoring systems provide valuable early warning during a leak event, allowing staff to evacuate safely and respond quickly before conditions become hazardous.
As compressed gas systems continue to expand across restaurants, entertainment venues, and commercial facilities, CO2 monitoring technology is becoming an essential part of modern building safety infrastructure.
By combining proper installation, training, signage, and monitoring equipment, facility managers can significantly reduce risk and maintain safer environments for everyone inside their buildings.
