ICAO Level A requires a 2.8m² fire to be extinguished at an application rate of 4.1L/min/m². ICAO Level B requires a 4.5m² fire to be extinguished at an application rate of 2.5L/min/m². ICAO Level C requires a 7.32m² fire to be extinguished at an application rate of 1.75L/min/m².