The number of high-rise buildings with enclosing structures made of glass is growing rapidly every year. High transparency of buildings is becoming one of the reasons of high-energy consumption. The problem of energy saving in glass structures is becoming more and more urgent. The innovative double-skin glass facade system has proven to be energy efficient in European countries. In the future, this design will significantly reduce the energy load of the building. The object of research is an innovative systems Сlosed cavity facade (CCF). The purpose of this work is to analyze the energy efficiency of the innovative system Closed cavity facade. The energy consumption of a building with classic glazing (a) and Сlosed cavity facades are considered. Method. In the analytical study, to determine the unknown characteristics of the closed cavity facade systems, the ANSYS software package was used - a universal system of finite element analysis. The services Autodesk Insight and Autodesk Green Building Studio estimated building energy consumption, electricity consumption by month, carbon dioxide emissions, total energy costs for the year and for the life cycle, etc. Results. In the analytical study, the classification of double facades by the ventilation method and by the geometry of the inter-contour space is presented, the main advantages are revealed. As a result of mathematical modelling, the calculated heat transfer resistance was determined for the Facade with a closed cavity Rcalc = 1.93 m2∙K/W. The result for the Closed Cavity Facade system was 35.7% more efficient than classical glazing. The average energy consumption for a building with classic glazing was determined - 374 kW / m2 / year with classic glazing and the average energy consumption for a building with a closed cavity facade - 219 kW / m2 / year. The difference in power consumption is 41.4%.