1. Definitions

2. 7 Class A –Wood, plastic and rubber Class B –Flammable liquids and gas Class C –Energized electrical Class D –Flammable metals Per NFPA statistics, 97% of all fires fall into the Class A category Fuel Classifications

3. 8 Foam Solution Water + Foam Concentrate = Foam Solution

4. 9 Finished Foam Foam Solution + Air + Agitation = Finished Foam

5. 10 Foam solution + air injected under pressure A foam delivery system that incorporates –A water pump –A foam proportioner –An air compressor Compressed Air Foam Systems CAFS

6. 11 Critical Application Rate The flow rate (water or solution) applied to a fire at which the fire does not grow –Exceed the critical application rate and the fire is extinguished –Flow less than the critical application rate and the fire burns unchecked