This category contains data on various Energy Star rated products. These are US products that reach a certain standard for energy usage. The data in each subcategory uses a typical yearly usage value to calculate the energy used per year. The relevant electricity emission factor, based on that entered in the metadata section is then used to calculate the kgCO2 per year. If no country has been entered in the metadata then the default US electricity emission factor is used. In each subcategory there is a profile item value option for quantity, this defaults to 1 if nothing is entered by the user.