The key to understanding the beauty of the  Dualmist System is understanding the droplet size.
In the chart above you can see that the range of droplet sizes produced by the Dualmist System is in between that of sprinklers and high pressure systems.

With high pressure systems - a very fine mist/aerosol is produced which is very effective at heat suppression but not so good at high ceiling heights or in open areas as side draft can cause the vapor to be swept sideways away from the fire. With high pressure systems there is little surface wetting due to the vapor evaporating before it reaches the fire.
Conversely with sprinkler systems there is a huge amount of surface wetting but very little heat suppression as there is very little mist produced and little to stop the heat spreading across the ceiling cavity by convection or heat transfer across the room from radiating burning/hot objects.

As shown, the dualmist system produces the range of droplet sizes in between both (hence DUAL mist).
This means the system produces both mist for heat suppression and coarser droplets for surface and wall wetting. The nozzle can use all methods to suppress the fire effectively.

As you can see for a 2.5 height room there is an optimum range of droplet size to produce both effects.
For higher height rooms the optimum range droplet size moves upwards accordingly.


For up to date information about the product range please visit



© 2020 by DualMIST International Ltd

  • LinkedIn - Grey Circle

Dualmist International