| # | Raison sociale | Rôle | Nombre de projets |
|---|---|---|---|
| 1 | 3H Contracting | fluides (installation) | 0 |
| 2 | A & A Mechanical Inc | fluides (installation) | 0 |
| 3 | Abbott & Associates Inc | fluides (installation) | 1 |
| 4 | A B I Mechanical | fluides (installation) | 0 |
| 5 | Able Products Company | fluides (installation) | 1 |
| 6 | A & B Mechanical | fluides (installation) | 0 |
| 7 | ABUS August Bremicker Söhne KG | fluides (installation) | 0 |
| 8 | Aca (air Conditioning Appliance Corp) | fluides (installation) | 0 |
| 9 | Acc Contractors | fluides (installation) | 2 |
| 10 | ACCO Engineered Systems | fluides (installation) | 10 |
| 11 | ACCO Engineered Systems | fluides (installation) | 0 |
| 12 | ACCO Engineered Systems | fluides (installation) | 6 |
| 13 | Accura Mechanical Inc | fluides (installation) | 1 |
| 14 | Accurate Air | fluides (installation) | 1 |
| 15 | Accurate Air Systems | fluides (installation) | 1 |
| 16 | Ace Air Tech Inc | fluides (installation) | 1 |
| 17 | ACE Energi & Klimat AB | fluides (installation) | 1 |
| 18 | Ace Heating & Cooling | fluides (installation) | 1 |
| 19 | A C General Inc | fluides (installation) | 1 |
| 20 | Acker and Sons | fluides (installation) | 1 |
