I want to extend the lenght of the warm air outlet hose of my mobile airconditioner. Is that possible?

We do not promote the extension of the lenght. Although there is a condens water reservoir, there is always some moist air coming out the airconditioner. When the hose is extended, there is a possibility that the warm air cools down and moist condenses in the hose and flows back in the airconditioner. In time, this might cause damage to the airconditioner.