This document summarizes mechanical system selections for several multi-unit residential buildings. It discusses selecting high-efficiency condensing boilers to replace aging central plants at a midrise apartment building. For garden apartments, it recommends replacing furnaces with fan coils served by smaller boiler plants. For another project, it proposes indirect water heaters to replace existing units. The document considers options for heating, ventilation, and domestic hot water and outlines the final selected systems for improved efficiency and durability.
