This paper describes the process of intensification of condensation heat transfer on a single horizontal integral-fin tube due to the enhancement of condensate drainage. An analytical model of the drainage effect of a special longitudinal solid strip is presented. The so-called drainage parameter seems to be the most important in the model. Exemplary calculations have been made to investigate the effect of tube and strip geometry on the enhancement of the drainage process. The experimental investigations of the condensate drainage from a single horizontal integral-fin and unfinned tube by using a longitudinal solid drainage strip are presented in this paper. The condensation heat-transfer augmentation in the range 6-25% was achieved by means of a solid drainage strip.