CPV code 42510000 designates Heat-exchange units, air-conditioning and refrigerating equipment, and filtering machinery in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
42510000 sits under 42500000 (Cooling and ventilation equipment) and groups 5 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.