The Geothermal Name to Trust in Cresco Forgive the pride, but that would be us: Johnson Comfort Systems, Inc.! Cresco, Iowa, homeowners have been looking to us to satisfy their geothermal heating and cooling needs for years, now. We'd like to earn your assurance, as well. If you've been wanting to "go geothermal" but have put it 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 Johnson Comfort Systems, Inc. for the finest geothermal system installation and service in Cresco - 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.