How Water Mist Systems Work

1. Cooling

Water spray in droplets of micron size produces a large surface area for heat absorption. Once in contact with hot bodies and gases, these droplets convert to vapour absorbing a large quantity of heat, equivalent to 540 calories per gram.

2. Smothering

The water in its vapour state occupies 1,600 times more volume than as a liquid and displaces an equivalent volume of oxygen, thus creating a smothering effect. If both the water vapour generated and the temperature in the hazard is high enough, the concentration of oxygen can fall drastically in the whole room.

3. Attenuation

The water mist cloud generated will attenuate radiation to limit the propagation of fire to other areas while at the same time diminishing the overall heat radiation throughout the room