Fire extinguisher older models also achieved class B and C fire-fighting capability in the past, current models are rated A:K (Amerex, Ansul, Buckeye and Strike First) or K only (Badger/Kidde). Clean agents extinguish fire by displacing oxygen (CO or inert gases), removing heat from the combustion zone (Halotron-1, FE-36, Novec 1230) or inhibiting the chemical chain reaction (Halons). They are referred to as clean agents because they do not leave any residue after discharge which is ideal for protecting sensitive electronics, aircraft, armored vehicles and archival storage, museums, and valuable documents. Halon was completely banned in Europe and Australia except for critical
Chubb Fire fighting equipment. The name Pyrene was epitomised by their famous 'pump' extinguisher which was installed on public transport, commercial and private vehicles throughout the western world. 1907 A Scottish engineer unable to get backing in the United Kingdom took his idea for a fire extinguisher to the United States. He set up in New York, and eventually became known as the Pyrene Company of Delaware. 1914 The Pyrene Company Limited began in the United Kingdom, when Wallace B. Phillips, an American set up in Great Queen Street, London, selling 'pump' extinguishers. 1918-20 The company moved to Grosvenor Gardens, London in