We're Milaca's Primary Geothermal Contractor! Milaca, Minnesota, homeowners have all kinds of reasons for wanting a geothermal heating and cooling system: exceptional year-round comfort – no matter how crazy the seasonal variations stable operating efficiency energy efficiency (They’d be hard-pressed to find a more "green," more natural way to heat and cool their homes!) significant – sometimes outstanding – savings on their energy bills noteworthy installation and service from Willow River Geothermal , Milaca's geothermal professionals. Find out more about what a geothermal heating and cooling system can do to increase your family's comfort. Look at our Geothermal Savings Calculator. Then contact Willow River Geothermal . We sell, install, and service heating & cooling geothermal systems, the very best available today.