IX International congress “Energy efficiency. XXI century”

The congress “Energy efficiency. XXI century. Engineering methods for reducing the energy consumption in buildings” took place in St. Petersburg on 11 November 2015. The article describes the main reports of the plenary meeting, primarily devoted to the Russian laws in the energy saving field. Furthermore, the summary of reports of the section “Building thermophysics: increasing the energy efficiency of residential and public buildings during the major repairs and reconstruction” is given.