This paper describes the development of a design of massecuite reheater incorporating a modular form of finned tube banks having a number of features of interest to the sugar industry. Current practice has been to install finned tube reheaters of rectangular cross section with the tubes welded into and protruding through the end walls, the tubes being a permanent fixture in the reheater. Current practice had further been to use the reheaters in a non-pressurised application. The author believed that a circular cross section vessel could offer a simpler design approach to these reheaters.