Tacoma Looks to Us for Geothermal Heating & Cooling! We're Vaughn Mechanical. And we're known throughout Tacoma, Washington, for our geothermal heating and cooling knowledge. Residents turn to us for ... first-class geothermal system installation and service qualified, highly trained personnel who understand every detail of geothermal heating and cooling - and know how to help you understand geothermal systems from one of the industry's most credible names - WaterFurnace recommendation on how to maximize the potential from their geothermal heating and cooling installation Of course, a significant reason people look to us to begin with is for the savings they can get on their energy bills with a geothermal system. Want a preview? Give our Geothermal Savings Calculator a go. Then take the next step and contact Vaughn Mechanical. We'll walk you through more of what makes geothermal systems the premium choice for year-round heating and cooling comfort in Tacoma.