| Business | Phone |
| Valley Mechanical Inc 10 N 10th Ave, Walla Walla 99362 | (509) 522-0548 |
| Blue Mountain Heating & Coolng 904 N 4th Ave, Walla Walla 99362 | (509) 525-4868 |
| Sure Temp Mechanical 620 Ash St, Walla Walla 99362 | (509) 522-0089 |
| Schaefer Refrigeration Inc 2929 E Isaacs Ave, Walla Walla 99362 | (509) 525-2076 |
| Independent American Refrig 1007 W Rose St, Walla Walla 99362 | (509) 520-2453 |
| Grassi 1445 W Rose St, Walla Walla 99362 | (509) 529-9700 |