| Nace | Description | Number of Company |
|---|---|---|
| 28.25.03 | Manufacture of air-conditioning equipment (including those used in motor vehicles) | 206 |
| 28.25.04 | Manufacture of heat exchanger units, air or other gases for liquefying machines and machines and devices used for filtering and purification of air / gas | 142 |
| 33.20.45 | Installation of industrial type heating, air conditioning and refrigeration devices and equipment | 487 |
| 43.22.03 | Installation and repair of water and sewage systems at buildings and other construction projects (sanitary installation works including installation of sprinkler systems, installation of fire fighting systems, laying sewerage systems, etc.) | 945 |
| 43.22.05 | Gas installation activities (including installation works for supply of oxygen gases in hospitals) | 338 |
| 43.22.06 | Repair and maintenance of ventilation, refrigeration and air conditioning systems in buildings and other construction projects (including repair and maintenance of domestic boilers and burners, heating systems and non-electric solar heat co | 3316 |
| 43.22.07 | Installation of ventilation, refrigeration and air conditioning systems in buildings and other construction projects (including installation of domestic boilers and burners, heating systems and non-electric solar heat collectors) | 533 |
| 46.74.03 | Wholesale trade of sanitary system and heating materials (sink faucet, valve, valves, plugs, t-pieces, links, etc.) (except boilers and radiators) | 892 |
| 46.74.04 | Wholesale trade of iron or steel central heating radiators, central heating boilers (including combi boilers) and their parts (except steam generators and boilers producing hot water) | 585 |
| 46.74.06 | Wholesale trade of metal reservoirs, tanks, vats and similar containers with a capacity> 300 liters (except those for central heating purposes and those with mechanical or thermal equipment) | 23 |
