The emergency department should have at least 145m2 of total internal area for a 100-bed hospital. It requires immediate access to critical care areas like the operating theatre, intensive care unit, blood bank, and laboratory. The emergency department entrance must be clearly marked and separate from the main hospital entrance. It should open into a spacious lobby with a porch to protect patients arriving by ambulance from the weather. Clinical areas of the emergency department should be located on the ground floor for easy accessibility.