CPV code 45331000 designates Heating, ventilation and air-conditioning installation work in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
45331000 sits under 45330000 (Plumbing and sanitary works) and groups 2 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.