We're Pulaski County's Primary Geothermal Contractor! Pulaski County, Indiana, residents have all kinds of reasons for desiring a geothermal heating and cooling system: exceptional year-round comfort – no matter how extreme the weather 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 – often outstanding – savings on their energy bills superior installation and maintenance from Gast Heating & Cooling Inc., Pulaski County's geothermal experts. Discover more about what a geothermal heating and cooling system can do to benefit your family's comfort. Check out our Geothermal Savings Calculator. Then contact Gast Heating & Cooling Inc.. We sell, install, and maintain WaterFurnace geothermal systems, the finest available today.