Take a look at successful geothermal installations in homes, businesses, schools and more across the Midwest.
These homeowners have significantly lowered their utility bills - and improved their comfort - with geothermal technology.
"We are very satisfied with the heating and cooling, and the temperature control. Since there is no combustion, the air isn't too dry in winter."
"The comfort, safety, strength and quietness of the geothermal radiant floor heat is unequaled in any other type of system on the market today."
"I like the air conditioning side of the system for the fact there in no noise in the summer when sitting on the deck. I also like the even heat in the winter."
Commercial & government buildings
Whether it's a hospital, warehouse or sports facility, geothermal provides significant business energy savings.
Albert Lea City Ice Arena
Use of geothermal and other energy-savers significantly reduced energy bills for this facility's major expansion.
Alliant Energy Dubuque Office
This 20,000-square-foot downtown office building uses filtered Mississippi River water and VFD-controlled pumps.
Dubuque County Courthouse
First-year savings to taxpayers for heating and cooling this historic building was $6,000 in natural gas, $3,000 in water and $2,000 in electricity.
Great River Medical Center
The nation's largest water-source geothermal system brought a $400,000 per year reduction in operating, maintenance and energy costs for this health care campus.
Mason City YMCA
This community recreation, sports and physical rehabilitation center will save about $50,000 per year with their new geothermal system.
Schools & churches
From college campuses to community churches, geothermal is keeping students and worshippers comfortable.
Cedar Rapids Schools
"The savings in energy and operating costs compared to ordinary systems make geothermal an attractive choice."
Dubuque Community Church
"These low costs have enabled us to use money that would have previously used for utilities for the ministry of helping."
Students at a few of Dubuque's schools are enjoying the comforts of advanced energy technology.
Grace Community Church
Over time, this Eyota, Minnesota, congregation will reduce heating costs by 36 percent and cooling costs by 43 percent.
Luther College - Center For The Arts
"While it was a challenge to accommodate the concerns of everyone on the design/build team, it was well worth the effort in the end."