CPV code 09324000 designates Long-distance heating in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
09324000 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 09320000 (Steam, hot water and associated products).