CO2 detection is required in many jurisdictions for certain businesses and environments.
In the 2015 edition of the International Fire Code (IFC), the requirements for CO2 detection are found in Chapter 53, “Compressed Gases.” Section 5307 is “Carbon Dioxide (CO2) Systems Used in Beverage Dispensing Applications,” here’s a look:
5307.5 Required protection. When carbon dioxide storage tanks, cylinders, piping and equipment is located indoors, rooms or areas containing carbon dioxide storage tanks, cylinders, piping and fittings and other areas where a leak of carbon dioxide can collect shall be provided with either ventilation in accordance with Section 5307.5.1 or an emergency alarm system in accordance with Section 5307.5.2.
5307.5.2 Emergency alarm system. An emergency alarm system shall comply with all of the following:
- Continuous gas detection shall be provided to monitor areas where carbon dioxide can accumulate.
- The threshold for activation of an alarm shall not exceed 5,000 parts per million (9,000mg/m3).
- Activation of the emergency alarm system shall initiate a local alarm within the room or area in which the system is installed.
The threshold is a tank of 100 pounds or greater. Within the IFC is a reference to NFPA 55, “Compressed Gases and Cryogenic Fluids Code.”Chapter 6, “Building-Related Controls,” contains the following requirement:
8 Employee Alarm System. Where required by government regulations, an employee alarm system shall be provided to allow warning for necessary emergency action as called for in the emergency action plan required by 188.8.131.52, or for reaction time for safe egress of employees from the workplace or the immediate work area, or both.