What is the minimum net clear opening of an exit window located at the grade floor of a single residence?

The minimum net clear opening of an exit window located at the grade floor of a single residence is established to ensure that occupants can safely exit through the window in case of an emergency. A net clear opening of 5 square feet is mandated by building codes for ground-level exit windows because this size provides sufficient space for a person to escape quickly and safely. Adequate exit windows are essential for life safety, particularly in scenarios like a fire where rapid evacuation may be necessary.

While other options suggest various sizes, the choice of 5 square feet is specifically indicated to meet code requirements for emergency egress. It balances the need for safety with architectural considerations, thereby enabling effective escape without compromising the structural integrity of the building.