CPV code 45331200 designates Ventilation and air-conditioning installation work in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
45331200 sits under 45331000 (Heating, ventilation and air-conditioning installation work) and groups 3 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.