Which type of nozzle moves more air and is therefore more likely to disrupt the thermal balance?

The fog nozzle is designed to produce a fine mist of water droplets that can effectively absorb heat and produce a substantial amount of steam. This characteristic allows it to generate a larger volume of air movement, which can disrupt thermal balance in a fire environment. When using a fog nozzle, the dispersed water droplets can create a cooler, more humid atmosphere, aiding in both fire attack and ventilation.

This technique can displace hot gases and potentially lower the temperature in the area, but it can also lead to turbulence, which can disrupt thermal layering and affect smoke movement in a structure. The ability of a fog nozzle to move more air makes it particularly useful for cooling hot surfaces and enhancing the efficiency of fire suppression tactics, though firefighters must be aware of the potential for unwanted air movement causing rapid fire behavior changes.

Other nozzle types, like solid, straight, and cellar nozzles, do not produce the same level of air movement or disruption to thermal balance as fog nozzles. Solid stream nozzles concentrate the water in a tighter pattern without creating significant air movement. Straight stream nozzles direct a focused beam of water without inducing as much turbulence. Cellar nozzles are typically used in specific firefighting situations, such as attacking fires in bas