Department of Environmental Engineering(DIAm) University of Calabria P.Bucci 87036 Arcavacata di Rende Italy;
Department of Environmental Engineering(DIAm) University of Calabria P.Bucci 87036 Arcavacata di Rende Italy;
Department of Environmental Engineering(DIAm) University of Calabria P.Bucci 87036 Arcavacata di Rende Italy;
DHW energy sources; DHW production systems; Survey; Chi-square test;