The article presents results of energy inspection of educational building “Gidrocorpus-2” of Saint-Petersburg State Polytechnical University. The energy audit was realized for estimation of use efficiency of energy resources and determination of opportunities for its increase. According to the results of energy audit the analyses of state of energy consumption are provided. The class of energy efficiency is defined. The recommendations and possible opportunities of energy saving and increase of power efficiency of “Gidrokorpus-2” is presented in conclusion of article.