Final answer:
The net clear opening of an emergency escape window on the 2nd story must be at least 5.7 sq ft to comply with safety codes.
Step-by-step explanation:
The student is asking about building safety requirements, specifically the minimum size for an emergency escape window on the second story of a building. The correct answer to the question is that a bedroom emergency escape window located on the 2nd story must have a net clear opening of at least 5.7 sq ft. This information is based on building codes which specify the minimum opening size to ensure that occupants have a viable means of escape in case of an emergency, like a fire.
It is important not to confuse this requirement with thermal performance or heat loss calculations described for a hypothetical house, which are unrelated to the question and mention different measurements, such as window area in square meters and heat loss in watts per degree Celsius.The minimum net clear opening area required for a bedroom emergency escape window located on the 2nd story is 5 square feet (Option A).According to safety building codes, the net clear opening is the actual opening through which a person can escape. In the case of a bedroom emergency escape window, it needs to be large enough for a person to crawl through in the event of an emergency.Option A, which corresponds to 5 square feet, is the correct answer as it meets the minimum requirement for the net clear opening area.