Carbon Dioxide Signs

Carbon dioxide is an odorless, colorless gas that displaces oxygen and can accumulate to dangerous or fatal concentrations in poorly ventilated enclosed spaces such as CO2 fire suppression rooms, cold storage rooms, and beverage dispensing areas. Posting CO2 warning signs alerts workers to the asphyxiation risk before they enter these spaces without appropriate monitoring or respiratory protection.

Yes. OSHA and NFPA 12 require that rooms protected by CO2 fire suppression systems be clearly marked with warning signs to alert personnel before entry. Our CO2 fire suppression system warning signs communicate the hazard at all entry points, helping ensure workers do not enter a discharged CO2 suppression area without proper respiratory protection and atmospheric verification.

Yes. Our customizable CO2 sign templates allow you to add specific ventilation requirements, respiratory PPE instructions, emergency contact information, or permit-required confined space designations. Custom CO2 signs are available in aluminum, rigid plastic, and adhesive formats - ideal for facilities with specific carbon dioxide safety programs requiring more detailed hazard communication.

A Danger CO2 sign is used where concentrations could reach immediately dangerous to life and health levels - such as a CO2 fire suppression system discharge room. A Warning CO2 sign is appropriate for areas with a serious but lower-probability asphyxiation risk. We offer both headers so you can match your CO2 hazard sign to the actual severity of the carbon dioxide exposure risk at each specific location.