Abstract: A vapor is condensed onto a condensor whose upper portion promotes film-wise condensation and whose lower portion promotes drop-wise condensation. One embodiment of this invention uses a plastic condensing tube which has a metal condensor pipe inserted into the tube in its upper end. Grooves and aperatures in the wall of the pipe encourage the flow of condensate between the pipe and plastic tube to facilitate heat conduction between the two. Heat conduction between the plastic tube and metal pipe is facilitated by a liquid such as heat-sink grease. An alternate embodiment features a plastic-only heat condensor whose upper portion is treated to make it condense the vapor as a film and whose lower portion is untreated so as to condense the vapor as drops.