The Turbine Duke cabin has a maximum pressure differential of 4.7psi, which basically means the maximum possible difference between cabin pressure and outside air pressure is 4.7psi. In practical terms this means the Turbine Duke can maintain a cabin pressure equivalent to sea level while flying at 10,000ft (that is a cabin altitude of 0ft), and at the Turbine Duke’s service ceiling of 30,000ft it can maintain a cabin pressure equivalent to roughly 13,000ft (cabin altitude of 13,000ft)