In some cases, it may be dangerous to use any type of fire extinguisher. An extinguishing agent released under pressure could, for example, spread a grease fire in a frying pan rather than put it out. In a kitchen, safety for a grease fire is under Class B. Extinguisher Sizes Portable extinguishers are also rated for the size of fire they can handle. The larger the numbers, the larger the fire that the extinguisher can put out, but higher rated models are often heavier. Make sure you can hold and operate an extinguisher before you buy it.
Extinguishers require routine care.
Read your operator's manual to learn how to inspect your extinguisher. Follow manufacturer's instructions or maintenance. Rechargeable models must be serviced after every use. Disposable fire extinguishers can be used only once and must be replaced after use. This unlocks the operating lever and allows you to discharge the extinguisher.