Packaged rooftop units (RTUs) are the workhorses of the commercial market, providing cooling to approximately 60% of U.S. commercial building floor area. While it is impossible to know exactly how many are currently in operation, some estimate that there are about 15 million RTUs installed in commercial buildings in the U.S.
RTUs often lose efficiency over time, particularly if they are older or have not been properly maintained, leading to higher energy bills and lower occupant comfort. Replacing RTUs can be an expensive proposition, though, and building owners and managers may be hesitant to make such large investments. In this case, the best solution may be for contractors to suggest retrofitting these units with energy-saving upgrades, which can save money as well as improve occupant comfort.