internal_id_type[1] = 10: Building Type
internal_id[1] = 1: One- and Two-family Houses
internal_id[1] = 6: Apartment Buildings (3-6)
internal_id[1] = 9: Row Houses
internal_id[1] = 11: Semi-detached Houses
internal_id[1] = 38: Apartment Buildings: 7 and More Apartments
internal_id[1] = 100: Total
internal_id_type[2] = 130: Heat Source for Heat Pumps
internal_id[2] = 0: Total
internal_id[2] = 1: Air
internal_id[2] = 2: Ground Probe
internal_id[2] = 3: Ground Collector
internal_id[2] = 4: Solar-Thermal Energy and Ice Storage