| 570 - 579 : AIR CONDITIONING, VENTILATION | ||
|---|---|---|
| 570 | Air Conditioning, Ventilation (Grouped) | |
| 571 | Central air conditioning | |
| 572 | Air heating only | |
| 573 | Local air conditioning | |
| 574 | Air heating only | |
| 575 | Air treatment | |
| 576 | Mechanical ventilation services | |
| 577 | Unit ventilation | |
| 578 | Other types of air conditioning | |
| 579 | Parts and accessories | |