Product use periods defined as the product life spans stipulated for each product * materials catalog (11th edition, 3-6, pages 23 to 26) and EnergyPlus, a U.S. energysaving software *3. Sets double-glazing glass as the standard glass for region 1 and Europe and singlepane glass (FL3) as the standard glass for other regions according to the energy-saving standard regional categories *4.