The Geothermal Name to Trust in Madison Forgive the over confidence, but that would be us: Affordable Geothermal LLC! Madison, South Dakota, homeowners 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 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 discover the savings a geothermal heating and cooling system can offer. Want proof? Do a little simple math with our Geothermal Savings Calculator. Then contact Affordable Geothermal LLC for the very best geothermal system installation and service in Madison - and beyond! Oh ... and talk about trust: We install geothermal heating and cooling systems by WaterFurnace. That's a name that resounds in the geothermal industry.