High energy demand associated to the massive use of air conditioning systems requires careful consideration
of passive cooling strategies, with evaporative cooling being recognized as a useful possibility
for that purpose. One important factor that influences the performance of evaporative cooling systems
is the media material that supports water evaporation process. In this work evaporative cooling capabilities
of different building and textile materials were experimentally determined. The major purpose of
the study was to select an evaporative cooling material to be used in a more complex passive cooling unit
under research development. A test tunnel was constructed for this particular work and the behavior of
several samples was analyzed. Results show that among the studied materials a polyester spacer fabric
with honeycomb structure presents best performance.