An atrium should not be listed as a separate property use in Portfolio Manager; the atrium floor property use should be included in the total floor property use for the office. The atrium is defined as the actual floor area at the base of the atrium. For example, if property A has an atrium that occupies 500 square feet on the base level and extends up three stories, it would be necessary to enter 500 square feet to account for the atrium. If property B has an atrium that occupies 500 square feet on the ground level and extends up five stories, it would also be necessary to enter 500 square feet for the atrium. The operating hours of the atrium are the total hours per week that the atrium is in use; this should correspond to the hours of operation for the rest of the office. The number of occupants should include the total number of workers in the atrium, including receptionist, security guards, or others who spend the majority of their day in this space. The number of PCs should include the total number of personal computers that are located in the atrium. The energy use in this common area of the property should be included in the total energy consumption for the property.