In which scenario would a Vent, Enter, Isolate, and Search (VEIS) technique be appropriate?

The Vent, Enter, Isolate, and Search (VEIS) technique is particularly well suited for scenarios where smoke is present, as it indicates potential fire involvement and an environment that requires systematic searching for victims or hot spots. In this scenario, grey smoke seeping out of an open window suggests that there is a fire likely underway, and the smoke color indicates that the fire could be in a smoldering or transitional state, providing valuable information about the fire's behavior.

The presence of grey smoke can imply a less than fully developed fire, often allowing for more effective and safer engagement by firefighters. Allowing for ventilation through an open window before entering helps in reducing the heat and improving visibility while conducting a search. This technique is designed for situations where there may be trapped victims or the potential for fire spread, making it critical to isolate the room or area to prevent the fire from escalating.

In contrast, scenarios such as dense black smoke seeping from doors indicate more dangerous conditions that may require different approaches, such as prioritizing ventilation over immediate entry. No smoke visible and clear, calm conditions do not signify an urgent need for the VEIS technique, as these conditions do not suggest an active fire threat or the need to search for victims.