Air Techniques offers many different models of dental dry vacuum system. Always use a vacuum system that is rated for at least the minimum number of simultaneous users in your practice. See the chart below for details:
| MODEL | SIMULTANEOUS USERS |
| V3 | 3 |
| V5 | 5 |
| V7 | 7 |
| 2V3 | 6 |
| 2V5 | 10 |
| 2V7 | 14 |
| 3V5 | 15 |
| 4V5 | 20 |
| V15 | 15 |
| 2V15 | 30 |
| 3V15 | 45 |
| 4V15 | 60 |
