The energy information system is the result of a joint development project between IRI UL and Metronik d.o.o., and the architecture is such that UL systems are independent. The basic EIS includes energy accounting (legal obligation), and the upgrade can also collect data from calculating meters for electricity and heat (energy products). The system enables the production of various reports, both by building levels and by using energy, energy, costs and emissions of greenhouse gases, as well as the production of various comparative analyzes that are the basis for data verification and support for energy management of UL buildings.