When using a solid stream for protecting exposures, what action should be avoided?

Using a solid stream for protecting exposures is a critical technique in firefighting, particularly when it comes to preventing the spread of fire. Directing streams into natural ventilation openings can unintentionally draw fire and smoke into areas that are not already involved, leading to more widespread damage and increased risk to firefighters and civilians. This action can disrupt the flow path of the smoke and heat, potentially leading to backdraft situations or making conditions worse inside the structure.

In contrast, directing streams at ground level is sometimes necessary to protect against radiant heat or to cool surfaces. Using multiple streams simultaneously might be effective in covering a larger area but must be done carefully to avoid interfering with each other's effectiveness. Adjusting the stream pressure is often necessary to achieve the desired throw and reach of the water. Therefore, directing streams into natural ventilation openings is an action that should be avoided to maintain control and effectiveness in fire suppression efforts.