Numerical and experimental analysis of a passive room-dehumidifying system using the sorption property of a wooden attic space

The results of a passive room dehumidifying system using an existing attic space as a chamber, wood as a desiccant material, and optimized ventilation and solar energy for system operation, are reported in that paper. Numerical calculations, field measurements were carried out as well, in a test house in Japan over hot and humid summers in 2003 and 2004. The results and conclusions are presented.