Division (4)

For each building category, at least one reference building shall be established for new buildings and at least two for existing buildings subject to major renovation. Reference buildings can be established on the basis of building subcategories (e.g. differentiated by size, age, cost structure, construction material, use pattern or climatic zone) that take into account the characteristics of the national building stock. Reference buildings and their characteristics shall correspond to the structure of current or planned energy performance requirements.