A water mist fire extinguisher is a type of fire extinguisher that uses a fine mist of water to extinguish fires. This type of extinguisher operates by discharging a high-pressure mist of microscopic water droplets that cool down the flames and surrounding surfaces, removing the heat required to sustain the fire.

The fire extinguisher utilises specially engineered rotors to mix water and air at a pre-determined ratio, producing a fine mist of 40-60 micron molecules. Due to their small size, these droplets have a significantly larger surface area coverage than water alone, allowing them to spread further and cool more rapidly.

The mist is then ejected through a uniquely designed nozzle, which propels it over an extended distance. Upon reaching the flames, the mist transforms into steam, creating a blanket effect that surrounds and smothers the fire.

The water in the mist cools the flames, reducing their temperature below the point of combustion and preventing them from reigniting.

As a result of this process, the oxygen supply to the fire is cut off, and the flames are extinguished within seconds. The principle behind this is that without heat or oxygen, a fire cannot continue to burn.

Typically, a water mist fire extinguisher can be used to extinguish Class A, B, F and electrical fires, depending on the specific model and rating.

Class A fires involve combustible materials like wood, paper and textiles. Water mist extinguishers are highly effective in tackling Class A fires as the fine mist cools down the flames and surrounding surfaces, removing the heat needed to sustain the fire.

Class B fires involve flammable liquids such as gasoline, oil and solvents. Water mist extinguishers can also extinguish Class B fires by cooling the flames and suffocating them with the mist. However, it is essential to note that using water on some flammable liquids can spread the fire or cause it to splash, so it is crucial to check the extinguisher's suitability for the specific type of liquid involved.

Class F fires involve cooking oils and fats, typically found in commercial kitchens. Water mist extinguishers are highly effective in tackling these fires as they create a mist that quickly cools the flames and prevents re-ignition.

Electrical fires involve electrical equipment, and water mist extinguishers are suitable for these types of fires as the fine mist is non-conductive and safe to use around live electrical equipment. No electrocution!

Yes! Water mist is non-conductive. Please check the fire extinguisher labelling before use.

Water mist fire extinguishers are highly effective in extinguishing fires, and in some cases, they can be more effective than other types of fire extinguishers.

However, the effectiveness of a water mist extinguisher depends on the specific type of fire it is designed to extinguish. Compared to traditional water-based extinguishers, water mist extinguishers use a fine mist that reduces the amount of water needed to extinguish a fire, making them a more eco-friendly and cost-effective option. The use of a water mist fire extinguisher reduces the potential for collateral damage to sensitive equipment and electronics.

Compared to foam-based extinguishers, water mist fire extinguishers are effective in extinguishing Class A, B, F and electrical fires. While foam extinguishers are highly effective in smothering Class A and Class B flames. A foam fire extinguisher can cause significant damage to electronics. Compared to powder-based extinguishers, water mist extinguishers are safer to use in enclosed spaces, as they do not create a cloud of powder that can obscure vision and potentially cause respiratory issues. However, powder extinguishers are highly effective in extinguishing flammable liquid fires and can cover a more extensive area than water mist extinguishers. ABC dry powder fire extinguishers will always be considered the most versatile.

The range of a water mist fire extinguisher can vary depending on several factors such as the type of nozzle, water pressure, and the size of the extinguisher. Typically, water mist fire extinguishers have a range of 6 to 12 feet (1.8 to 3.7 meters).