What is the maximum allowable cabin altitude during flight?

The maximum allowable cabin altitude during flight for the ERJ 170/175 is 8,000 feet. This limitation is in place to ensure passenger comfort and safety by maintaining an environment that simulates conditions at lower elevations, preventing issues related to hypoxia and decompression sickness. Operating the aircraft with the cabin altitude maintained below this threshold helps to comply with safety regulations laid down by aviation authorities, allowing passengers and crew to remain comfortable and healthy throughout the flight.

In general, cabins are pressurized for optimal living conditions, and 8,000 feet is considered the upper limit for recreational flight to avoid significant physiological effects on individuals, especially those who may be sensitive to altitude changes. Further, exceeding this recommended cabin altitude could lead to increased risk and discomfort, making it crucial for pilots to adhere to this limitation for safe operational practices.