Michigan Nursing Home Administrator (NHA) Practice Exam

What percentage of window glass area must be openable unless the room is artificially ventilated?

1. 25%

2. 35%

3. 45%

4. 55%

The correct answer is: 45%

The correct answer is based on regulations concerning natural ventilation for residential and institutional buildings, including nursing homes. For a room to have effective natural ventilation, a specific percentage of its window area must be openable to allow fresh air to circulate. This requirement ensures that adequate airflow can occur, promoting better air quality and comfort for residents. The standard that mandates openable window area is typically set at 45% of the total window glass area when the room does not have artificial ventilation. This percentage allows enough opportunity for air movement, which is critical in environments such as nursing homes where residents may have health vulnerabilities. The other percentages listed do not meet the required standard for openable window area necessary for effective natural ventilation. Lower percentages like 25%, 35%, or even 55% do not fulfill the same regulatory needs that have been established for promoting health and safety within the facility. Thus, 45% emerges as the correct requirement for ensuring sufficient ventilation in spaces without artificial systems in place.