Energy efficiency is a set of planned and implemented measures aimed at reducing the amount of energy used but without reducing the benefits that the use of this energy provides. To the contrast to the energy saving, which is always at a sacrifice of a certain levels of benefits and the quality of life, working conditions or the production level, the energy efficiency means maintaining the same level of these categories, but with lower energy consumption.
Energy efficiency is strongly promoted by the European Union. Within the EU strategy of growth named “Europe 2020”, a central place is given to Energy efficiency, that is one of the goals set up in the climate-energy package 20/20/20, which prescribes an increase in energy efficiency by 20% by the year 2020. A number of EU directives and local regulations require the implementation of energy efficiency measures in many areas, while local legislations sets up implementation of energy efficiency measures as a responsibilty of local government.