How many oxygen masks are located at each PSU on the ERJ 175?

Each Passenger Service Unit (PSU) on the ERJ 175 is equipped with three oxygen masks. This design ensures that there is an appropriate amount of oxygen supply available for passengers in case of an emergency, adhering to safety regulations and providing a means of securing passenger safety during decompression scenarios.

The arrangement of three masks allows for adequate distribution among passengers, particularly in a configuration where multiple individuals may need access simultaneously. It's crucial that the masks are easily deployable and accessible, which is a standard in aircraft design to enhance passenger safety. The provision of three masks at each PSU supports efficient and timely access to oxygen for passengers seated in proximity during emergency situations.