What is Energy Efficient Economy

This chapter provides methodology for setting energy performance of residential buildings in European region and estimation of difference in energy performance as a tool for managers in public sector. The study deals with how to estimate energy performance for areas, where, due to its size, it is not possible to get technical parameters of particular buildings when data for setting energy performance are not or partially available and often inconsistent. Practical use of methodology is in providing essential data for subsequent determination of investment intensity of retrofit of buildings for the needs of public sector. It researches potential effects of retrofitting of all existing houses in the passive standard in region on overall improving of its energy performance. Final value represents maximum possible performance assuming all existing buildings corresponded to passive standard. This methodology can be generalized and used as tool for decision-making on energy performance at regional level in environment of insufficient data.