The Geothermal Name to Trust in Seattle Forgive the over confidence, but that would be us: Vaughn Mechanical! Seattle, Washington, residents have been looking to us to meet their geothermal heating and cooling needs for years, now. We'd like to earn your trust, as well. If you've been wanting to "go geothermal" but have been holding off, you can definitely trust us on this: given today's shifting economy, there's never been a better time to find out the savings a geothermal heating and cooling system can offer. Want proof? Do a little simple math with our Geothermal Savings Calculator. Then contact Vaughn Mechanical for the top of the line geothermal system installation and service in Seattle - and beyond! Oh ... and talk about trust: We install geothermal heating and cooling systems by WaterFurnace. That's a name that resonates in the geothermal industry.