Patent ID: 7357830

Claim:
A humidity exchange device comprising at least one first cavity and a first intermediate volume separated from said at least one first cavity by a first water-vapor-permeable structure, at least one second cavity and a second intermediate volume separated from said at least one second cavity by a second water-vapor-permeable structure, said first and second intermediate volume connected to one another by a closed air-stream circuit, the air-stream circuit confiqured to let only an air stream that is not heated or cooled by the excuange device flow in the air-stream circuit, the at least one first cavity and the first intermediate volume exchanging water-vapor between a first air stream flowing through the at least one first cavity and said air stream flowing in said closed air-stream circuit, and the at least one second cavity and the second intermediate volume exchanging water-vapor between a second air stream flowing through the at least one second cavity and said air stream flowing in said closed air-stream circuit.