The Geothermal Name to Trust in Washington Forgive the pride, but that would be us: Carlson Heating & AC, LLC! Washington, Kansas, residents have been looking to us to meet their geothermal heating and cooling needs for a number of years, now. We'd like to gain your confidence, too. If you've been wanting to "go geothermal" but have put it off, you can certainly 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 Carlson Heating & AC, LLC for the top of the line geothermal system installation and service in Washington - and beyond!