| Business | Phone |
| Bredan Mechanical Systems Inc W229n2494 State Road 164 100, Waukesha 53186 | (262) 521-9919 |
| Columbia Mechanical S40w24210 Rockwood Way, Waukesha 53189 | (262) 574-0613 |
| Superior Mechanical Insulation 300 W Main St, Waukesha 53186 | (262) 650-6750 |
| Raab Mechanical Inc 1516 S West Ave, Waukesha 53189 | (262) 547-0801 |
| Mechanical Installation & Svc 525 Progress Ave, Waukesha 53186 | (262) 513-4688 |