CUP is an abbreviation for Central Utility Plant. A central utility plant is the epicenter of the mechanical, electrical and sometimes plumbing systems that serve the building or many buildings on a site.
The CUP is home to all major mechanical, electrical, and plumbing equipment. Most equipment that supports the operation of the campus will be at the CUP. Some examples include power, water, and air conditioning equipment. More specifically, the generators, chillers, boilers, main pumps, central receiving, or centralized air compressor or other utility systems.
Many people refer to the CUP as the heart of a building system, while others refer to it as the workhorse. Either way, the CUP is the center point for building systems. It does most, if not all, the work to supply connected buildings.