| Business | Phone |
| Agombar Mechanical 189 Huron Cres, Thunder Bay P7A 3K3 | (807) 577-3551 |
| Allied Air Systems 448 Frontenac Bay, Thunder Bay P7C 1M6 | (807) 475-3626 |
| Gibson Refrigeration & Air 457 Bernard St, Thunder Bay P7C 4H6 | (807) 623-2694 |
| Hubbard Refrigeration-Air Cond 1500 Hilldale Pl, Thunder Bay P7B 5E5 | (807) 473-7792 |
| Jon Petrick's Heating & Mech 4 Onion Lake Rd, Thunder Bay P7B 5N1 | (807) 767-7391 |
| Ken's Refrigeration 126 Glendale Cres, Thunder Bay P7C 1N1 | (807) 577-3486 |
| Le Clair Heating & Sheet Metal 2613 Mcgregor Pl, Thunder Bay P7E 5G9 | (807) 623-4655 |
| Mastercraft Heating & Sheet 339 Shuniah St, Thunder Bay P7A 3A3 | (807) 344-1630 |
| Nichols Refrig & Air Cond 206 Carl Ave, Thunder Bay P7B 4Z5 | (807) 767-7230 |
| Prestige Fireplaces Heating 755 Tungsten St, Thunder Bay P7B 6T1 | (807) 346-4353 |
| Rengor Enterprises Ltd 1490 Broadway Ave, Thunder Bay P7C 5N5 | (807) 473-0845 |
| Beebe Mechanical Systems Ltd 345 May St N, Thunder Bay P7C 3R3 | (807) 623-4181 |
| Service Tech 116 Pennock Dr, Thunder Bay P7C 4V1 | (807) 474-9324 |
| Steve's Heating 215 Christina St W, Thunder Bay P7E 4P5 | (807) 939-1079 |
| Union Energy 565 Central Ave, Thunder Bay P7B 5R5 | (807) 346-1610 |
| Ward's Heating & Mechanical 833 Onion Lake Rd, Thunder Bay P7B 5N1 | (807) 768-9779 |
| Collier Heating & Sheet Metal 369 Cumberland St N, Thunder Bay P7A 4P4 | (807) 623-3855 |
| Freeze Flame Mech Systems Htg 534 Edison Rd, Thunder Bay P7B 5S3 | (807) 345-9174 |