Energy consumption in buildings typically accounts for over 40 - 50 % of the total energy consumption of Central European countries. Provision of the energy services for the indoor environment produces a large amount of outdoor environment pollutants. The energy intensity (consumption in relation to the GDP) in Slovakia is higher than in the OECD countries. In the past, energy prices for consumers in Slovakia were very low and did not reflect the real value of energy. It is expected that energy prices in Slovakia will increase to world market levels in the next years.