What is the minimum size for a residential emergency escape window?

The minimum size for a residential emergency escape window is established to ensure occupants can safely exit in case of an emergency, such as a fire, and that emergency responders can enter if necessary. According to the International Residential Code, the required net clear opening for emergency escape and rescue windows is a minimum of 5.7 square feet (or 5 square feet in some situations when the window is located at or below ground level).

This dimension ensures that the opening is sufficiently large for most people to escape easily and for rescuers to gain access. The measured size must account for any obstructions or elements that could reduce the available opening, highlighting the importance of not just the window's overall size but the net clear dimensions specifically.

Given these standards, the choice of 5.7 square feet is correct as it meets the safety requirements set forth in the code, ensuring adequate escape for residents in emergencies. In contrast, options indicating smaller sizes do not comply with these critical safety regulations and therefore cannot be considered correct.