Mainstream Electric LLC.

The company says it has been in business since 2000, and the state lists Todd and Elaine Damschen as principals since 2022, with Bradley Roberts, Harrison Petts, Gianugo Pischiutta and Joseph Finney added in 2024. The crew falls in the 51 to 75 worker range. Services advertised include furnace, heat pump and boiler repair, water heaters, panel upgrades, EV chargers, generators and duct cleaning. Mainstream says its technicians are company employees rather than subcontractors, that its HVAC techs are NATE-certified, and that jobs carry a one-year labor warranty plus manufacturer parts coverage. It also filed public work for the Spokane Housing Authority in 2013 as a subcontractor. This is a large residential service operation working several markets across the Inland Northwest, with 24/7 emergency dispatch and same-day appointments advertised. It fits a household that wants one call for a dead furnace, a slow main line and a panel upgrade, or a camera inspection before closing on an older house. The company's own guarantee terms exclude backups on drain clearing and sewer replacement, so anyone choosing on that point should read the terms first. Large commercial or new-construction mechanical contracts sit outside the service-and-repair mix the record shows. Spokane's housing stock makes sewer and electrical work unpredictable. Older homes on the South Hill and in neighborhoods like Logan and Garland often still have clay or cast-iron side sewers that root intrusion cracks, along with fuse boxes or undersized panels that can't carry a heat pump or EV charger. Newer builds in the Valley, Liberty Lake and Mead tend toward PVC lines and modern panels, so problems there lean more toward fixtures and equipment. A camera run before any sewer repair shows which pipe material you actually have, and that decides whether lining or digging makes sense.