INCREASE OF ENCLOSING STRUCTURES THERMAL PROPERTIES OF NARFU BRICK BUILDING
Microclimate of premises is formed under the influence of heat exchange processes with the external environment through enclosing parts, heating mode, internal heat input and other factors. Building materials can collapse over time, changing their thermal properties, during the buildings operation. The main direction in decreasing the heating costs is increasing the thermal resistance of enclosing structures by their insulation. Research of thermal properties, comparison of actual and calculated values of enclosing parts thermal resistance of NARFU brick building before and after insulation is an actual task in terms of energy saving. The estimation of thermal protection and energy efficiency of the NARFU brick building was made by calculation and by instrumental measurement in full-scale conditions. The paper presents the results of a five-year study of the enclosing structures of the NARFU built in the first half of the last century, which were reconstructed. Calculated and actual thermal resistances of enclosing structures before and after insulation, their comparison with the normative values for sanitary and hygienic requirements and energy saving conditions are given. The experiments confirmed the convergence of the calculated and actual values of the thermal resistance of the outer wall in all cases of instrumental measurements. As a result of the reconstruction, the energy efficiency class of building B was achieved