| Company Name | City | Phone Number |
| Actionaire Inc. | Aberdeen | (360) 538-0873 |
| Advanced Heating & Air | Cosmopolis | (360) 537-6505 |
| AR Heating & Cooling | South Bend | (360) 999-0928 |
| Bachers Heating & Cooling | Long Beach | (360) 214-2636 |
| Chehalis Sheet Metal | Chehalis | (360) 748-9221 |
| Diamond Heating | Seaside, OR | (503) 717-1667 |
| Energy Efficiency First | Olympia | (360) 236-9684 |
| Hanson Mechanical Systems LLC | Montesano | (360) 470-3993 |
| Infinite Heating and Cooling LLC | Longview | (360) 261-6545 |
| Magruder Heating & Cooling | Pe Ell | (360) 208-3665 |
| P & L Johnson | Astoria, OR | (503) 325-2180 |
| Precision Heating | Astoria, OR | (503) 861-1687 |
| Robbins Air Inc. | Aberdeen | (360) 538-7003 |
| Sunset Air | South Bend | (360) 972-6760 |
