Should You Use a Powder Extinguisher Indoors?
Introduction
The dry powder fire extinguisher is probably the most common fire extinguisher sold in the UK. These extinguishers are multi-purpose and can be used on solid, liquid, gas, and electrical fires.
They are often viewed as a cost-saving solution (e.g., why have two extinguishers when you can have just one?).
Advantages of Powder Extinguishers
The powder fire extinguisher is effective in many scenarios. It excels at extinguishing fuels, particularly running fuels, due to its fast knock-down effect that quickly extinguishes flames and removes oxygen from the fire. It is safe to use on electrical fires and is uniquely capable of tackling gas fires, such as propane.
Disadvantages of Powder Extinguishers
However, it is concerning that these extinguishers are commonly found in areas such as kitchens, offices, clothing establishments, and even healthcare centers. The use of powder extinguishers in these environments can lead to:
- Contamination of food
- Damage to electrical equipment, such as computers
- Ruining clothing
- Breathing difficulties due to inhalation of powder
One of the major disadvantages of powder fire extinguishers is poor visibility. When activated, a hanging cloud of powder quickly develops, inhibiting breathing and visibility.
Alternative Options
In many cases, it may be more appropriate to use either a foam extinguisher or a CO2 extinguisher. These alternatives effectively tackle fires without the mess and complications that powder extinguishers can cause.
Installation Guidelines
Ideally, powder extinguishers should only be installed in factory-type buildings, outdoor areas, or open spaces. They should only be installed if your fire risk assessment deems it necessary.