| Business | Phone |
| H F Clarke Ind Inc 1145 44 Ave Se #D, Calgary T2G 4X4 | (403) 299-0060 |
| Canadian Boiler Ind Inc 4001 16a St Se, Calgary T2G 3T5 | (403) 255-0186 |
| Davies Electric Co Ltd 2320 35 Ave Ne #5, Calgary T2E 6S9 | (403) 244-2161 |
| Quality Combustion & Controls Ltd 834, 3545 - 32 Ave NE, Calgary T1Y 6M6 | (403) 936-0065 |