CO2 Compliance for Restaurants & Bars: A Quick Guide

Carbon dioxide (CO2) is used every day in restaurants and bars to carbonate beverages, dispense draft beer, and support other beverage operations. While CO2 is essential to these systems, leaks can create serious safety hazards for employees and customers if proper precautions are not in place.

Whether you're opening a new restaurant, managing an existing bar, or overseeing multiple locations, understanding CO2 safety and fire code compliance is an important part of maintaining a safe facility.

This quick guide covers the basics of CO2 monitoring, common fire code requirements, and the steps restaurants and bars can take to maintain a safer environment.

Where Is CO2 Used in Restaurants and Bars?

CO2 is commonly used in several areas of food and beverage establishments, including:

• Soda fountains: CO2 is used to carbonate water for soft drinks and other beverages.
• Draft beer systems: CO2 helps maintain carbonation and provides pressure to dispense beer.
• Bulk CO2 storage: Many restaurants use large CO2 tanks to supply beverage systems throughout the facility.
• Beverage equipment rooms: CO2 cylinders, regulators, piping, and connections may be located in storage rooms, kitchens, or other back-of-house areas.

Although these systems are generally safe when properly installed and maintained, leaks can occur at tanks, fittings, regulators, and beverage lines.

Because CO2 is colorless and odorless, a leak may go unnoticed without appropriate detection equipment. CO2 is also denser than air and can accumulate in low-lying or poorly ventilated areas, potentially creating dangerous conditions.

What Are the CO2 Monitoring Requirements?

The International Fire Code (IFC) establishes safety requirements for certain CO2 systems, including those commonly used in restaurants and bars.

Depending on the applicable code edition, system configuration, and local jurisdiction, requirements may include:

• CO2 detection: Fixed monitoring systems that continuously measure CO2 concentrations in designated areas.
• Audible and visual alarms: Notifications that alert occupants when CO2 concentrations reach unsafe levels.
• Sensor placement: CO2 sensors typically installed within 12 inches of the floor in areas where CO2 may accumulate.
• Safety signage: Warning signs identifying CO2 hazards and providing appropriate safety instructions.
• Ventilation and shutoff controls: Additional protective measures that may be required depending on the system and application.
• Permitting: Operational or construction permits for qualifying CO2 systems, as determined by the local Authority Having Jurisdiction (AHJ).
  

For applicable systems, commonly referenced IFC alarm thresholds include:

CO2 Concentration	Typical Response
5,000 ppm (0.5%)	Supervisory notification
15,000 ppm (1.5%)	Intermediate alarm where configured
30,000 ppm (3.0%)	High-level alarm and occupant warning

These thresholds are not universal requirements for every installation. Alarm settings and required system responses depend on the applicable code and system design.

Important: Even if a restaurant or bar is not required to install a CO2 monitoring system under its local regulations, implementing appropriate detection and safety measures can help reduce the risk of an undetected CO2 leak.

What Does a CO2 Safety System Typically Include?

A properly designed CO2 safety system may include several components working together to detect elevated CO2 concentrations and alert building occupants.

CO2 Monitor and Sensors 

Fixed CO2 monitors continuously measure concentrations in designated areas. Sensors should be positioned according to the system design, applicable code, and manufacturer's installation instructions.

Audible and Visual Alarms

Warning devices notify employees and other occupants when elevated CO2 concentrations are detected. Depending on the installation, alarms may be located inside and outside affected areas.

Safety Signage

Clearly displayed warning signs help identify CO2 hazards and communicate appropriate safety precautions.

Automatic Shutoff Valve

Where appropriate or required, a solenoid shutoff valve can stop the CO2 supply when a specified alarm condition occurs, helping prevent additional gas from entering the affected area.

Power Supervision

Power supervision equipment can provide a trouble notification when electrical power to the monitoring system is interrupted, helping personnel identify when the system may no longer be operating normally.

The equipment needed will depend on the restaurant's layout, CO2 storage arrangement, beverage equipment, and applicable safety requirements.

CO2 Permitting and Inspections

Restaurants and bars with qualifying CO2 systems may be required to obtain permits from their local fire department or other governing authority.

The permitting process can involve:

1. Evaluating the existing CO2 equipment and facility layout.

2. Preparing plans showing the CO2 storage, monitoring equipment, and associated safety devices.

3. Submitting documentation to the appropriate AHJ.

4. Installing or modifying equipment to meet applicable requirements.

5. Completing the required inspections and obtaining approval.

Requirements can vary significantly between jurisdictions, even for restaurants operating within the same state.

For multi-location restaurant operators, evaluating each location individually is important because equipment configurations and local requirements may differ.

Maintaining CO2 Safety Over Time

Installing a CO2 monitoring system is only one part of maintaining a safe restaurant or bar.

Routine inspections, testing, and maintenance help ensure that monitoring equipment continues to function properly.

Recommended practices include:

• Periodically checking CO2 monitors and alarm devices for proper operation.
• Testing and calibrating CO2 sensors according to applicable requirements and manufacturer recommendations
• Inspecting tanks, regulators, connections, and gas lines for leaks or damage.
• Keeping warning signs visible and unobstructed.
• Training employees to recognize CO2 alarms and follow appropriate emergency procedures.
• Maintaining records of inspections, testing, and service.

Where the applicable fire code requires annual inspection, testing, and calibration, these activities should be completed and documented at the required intervals.

Even in locations without a specific annual recertification requirement, regularly maintaining CO2 safety equipment is a valuable precaution.

How Aerosphere Can Help

Aerosphere provides CO2 monitoring equipment and compliance services for restaurants, bars, and other commercial facilities.

From individual establishments to multi-location restaurant groups, our team can assist with:

• CO2 monitoring systems and safety equipment
• Site evaluations and system design
• Fire department permitting and coordination
• Professional installation
• Inspection support
• Annual recertification, testing, and maintenance

Whether you're installing a new beverage system, addressing a fire department requirement, or evaluating the safety of an existing location, Aerosphere can help identify an appropriate solution.

Have questions about CO2 safety at your restaurant or bar?

Contact Aerosphere to learn more about CO2 monitoring systems, permitting, and compliance services. Or view our industry page for restaurants and bars to learn more.