| Business | Phone |
| Andover Controls-Acs Ottawa 2350 Stevenage Dr #8, Ottawa K1G 3W3 | (613) 738-2447 |
| Honeywell 1682 Woodward Dr, Ottawa K2C 3R8 | (613) 228-3600 |
| Regulvar Canada Inc 170 Laurier Ave W, Ottawa K1P 5V5 | (613) 565-2129 |
| Psi Mechanical Svc Inc 880 Wellington St #808, Ottawa K1R 6K7 | (613) 233-1414 |
| Bascon Control Technologies 880 Wellington St #807, Ottawa K1R 6K7 | (613) 727-1100 |
| Belnor Engineering Inc 1501 Carling Ave, Ottawa K1Z 7M1 | (613) 729-6660 |
| Controls Depot 2150 Thurston Dr #105, Ottawa K1G 5T9 | (613) 248-1212 |