What is the maximum altitude for single pack operations in the CRJ 200?

The maximum altitude for single pack operations in the CRJ 200 is 25,000 feet. This altitude is specified to ensure safe and effective performance of the aircraft's environmental control system, particularly when operating with only one pack functioning. At higher altitudes, the one operational pack may struggle to maintain adequate cabin pressure and temperature, potentially compromising passenger comfort and safety. Therefore, pilots must adhere to this limitation to ensure that the aircraft can maintain a safe operating environment for all onboard.