The idea of this work is to analyze condensation of steam-air mixture in a baffled shell and tube condenser with one path tube. Film Theory was used to consider the effects of heat and mass transfer on each other. Accordingly heat and mass transfer equations through proposed algorithm were solved simultaneously for each of baffle spacing considered as a control volume in this work. The predicted outlet temperature of both gas (air-water vapor mixture) and cooling media and total condensation rate is compared with the available experimental data taken from a typical semi-industrial condenser. A very good consistency of the analytical approach with the experimental data is achieved and presented.