What is a characteristic of a proper egress window in terms of safety regulations?

A proper egress window must allow easy escape in an emergency, which is a critical safety aspect of building codes and regulations. This requirement ensures that in the event of a fire or other emergencies, occupants can quickly and safely exit from sleeping areas without excessive difficulty. Egress windows are designed to provide a means of escape that is readily accessible and usable, considering practicality and user capability—for example, they must open without the use of special tools and should not be blocked by security bars or screens.

While other options discuss certain characteristics that may be related to egress windows, they do not directly address the primary function of the window pertaining to safety in emergencies. For instance, the requirement for height from the ground or operability from outside may not necessarily contribute to the immediate safety of occupants needing to escape. The focus on easy escape is essential for ensuring the effectiveness of egress windows as safety features in a dwelling.