Fialko, N., Navrodskaya, R., Stepanova, A. and Gnedash, G. 2017. EFFICIENCY OF ELEMENTS OF COMBINED HEATUTILISATION SYSTEM FOR HEATING OF WATER AND COMBUSTION AIR. Thermophysics and Thermal Power Engineering. 37, 5 (Nov. 2017), 75-83. DOI:https://doi.org/https://doi.org/10.31472/ihe.5.2015.09.