A mechanical floor is a specialized level of a building that houses the mechanical and electrical equipment that controls the building's systems. There are several synonyms for the term mechanical floor, including the equipment floor, the utility floor, and the mezzanine level. Other possible terms include mechanical penthouse, technical floor, and service level. The mechanical floor is often located near the top of the building, as it is necessary to have easy access to the rooftop for the installation and maintenance of the equipment. Whatever term is used, the mechanical floor is an essential part of any modern, high-rise building.