| Business | Phone |
| On-Site Power Ltd 1700 Varsity Estates Dr Nw #94, Calgary T3B 2W9 | (403) 247-0150 |
| Petro-Tech Heaters Ltd 410 38a Ave Se, Calgary T2G 1X4 | (403) 255-0177 |
| Ramex Exchanger Inc 327 Scenic Glen Bay Nw, Calgary T3L 1H7 | (403) 547-8333 |
| Energy Transfer Systems 6915 32 Ave Nw #2, Calgary T3B 0K6 | (403) 247-0578 |