A simplified method of calculation of the heat transfer coefficients taking into account the influence of mass transport during boiling of multicomponent mixtures has been elaborated. The results of calculation were successfully confirmed in ternary system experiments (methanol-isopropanol-water) performed for different hydrodynamic conditions such as: pool boiling and liquid evaporation at the free surface of the falling film. The experimental data covered wide range of heat fluxes from 6 to 230 kW/m(2).