What is the main disadvantage of using Independent Service in a fire situation?

The main disadvantage of using Independent Service in a fire situation is that doors fully open automatically upon arrival. This feature can be problematic because it increases the risk of smoke and fire entering the elevator and can compromise the safety of the occupants. In emergencies, it is crucial to control access to the elevator space to prevent hazardous conditions, and automatic door opening can make it difficult to manage the situation effectively.

Being able to keep doors closed helps maintain a barrier against smoke and heat, protecting both firefighters and civilians who may be using the elevator. Automatic opening can also create additional challenges when coordinating the evacuation or their entry into the building during firefighting operations.