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Guest Zixel

Foam

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Guest Zixel

Why do people use foam? Powder has a batter range on all A and B classes, and also is a cheaper way? Also powder can take out fire of electric devices. Is there any purpose where foam is the best choise comparing to any other type of extinguisher? 
Thanks

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Hi

Powder extinguishers are great for generators, vehicles etc, however, they are now frowned-upon for indoor use, as they can drastically reduce visibility and can cause harm through inhalation. They are also costly to clean up after (relevant if there is any risk of misuse or vandalism). For indoor use, foam, water and water mist are now the most common extinguishers, with CO2 still supplied for high voltage applications and server rooms. For typical office use with electrical equipment you should use extinguishers that have been tested dielectrically to 34,000 Volt. This applies to some foams and water mist extinguishers with de-ionised water.

Harry

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