What is the primary method of diluting a fire in a facility?

The primary method of diluting a fire in a facility is utilizing open sprinkler heads. When activated, sprinkler heads release water directly onto the flames, effectively cooling and suppressing the fire. This method relies on the principle of controlling the temperature of the fire and reducing its intensity by delivering a significant volume of water at the source.

Sprinkler systems are designed to activate automatically in response to heat from the fire, providing immediate response to help contain or extinguish the flames before they can spread. This method is particularly effective in high-rise buildings where access to the fire may be limited, ensuring the fire is dealt with promptly as part of a comprehensive fire protection strategy.

The other methods mentioned, while valuable in certain contexts, do not provide the same immediate and widespread application seen with sprinkler systems in controlling fire spread effectively across large areas.