Efficient Heating and Cooling From the Ground Up
Geothermal heat pumps tap into stable underground temperatures to deliver the most efficient heating and cooling available — ideal for homeowners committed to long-term energy savings and comfort. Harmon Heating & Cooling designs, installs, and maintains geothermal systems across central Indiana.
Geothermal systems cost more upfront than traditional equipment but deliver operating savings that pay back the investment over 10–15 years. If you're thinking long-term and want to minimize energy bills and environmental impact, a geothermal heat pump is the gold standard.
Geothermal is one option for highly efficient heating and cooling. Compare it to our heat pump options or traditional furnace and central AC setups. Or add air quality upgrades to maximize indoor comfort alongside your geothermal system.
Maximum Efficiency
35+ Years of Experience
Long-Term Savings
Armstrong Air Certified
Local to Fishers
From full closed-loop installation to diagnosing loop, compressor, and control problems — the same team handles it all.
Your geothermal system isn't heating or cooling, the compressor won't run, or you're seeing unusual sounds or performance drops. We diagnose loop, compressor, and control problems. Explore geothermal repair.
Design and install a closed-loop geothermal system sized for your home's heating and cooling needs. We handle loop design, indoor unit placement, and system balancing. Explore geothermal installation.
A geothermal system delivers decades of low operating bills — but only when it stays properly maintained. Our maintenance plan covers annual tune-ups that keep the compressor, controls, and ground loop performing at their best year after year.
A new HVAC system is a real investment, and Harmon Heating & Cooling works with Service Finance to help make that investment manageable. Whether you're replacing an aging furnace before winter or upgrading to a more efficient central AC system, financing options are available so an unexpected repair or planned upgrade doesn't have to wait.
Our team can walk you through financing options through Service Finance at the time of your estimate, so you know what to expect before any work begins.
Contact Us to ApplyDon't wait on a failing furnace or AC — get your system installed today and spread the cost into manageable monthly payments.
Flexible terms keep payments predictable, so a new system fits your budget instead of draining your savings all at once.
Financing makes it easier to step up to a more efficient Armstrong system that lowers your energy bills month after month.
We design and service geothermal systems across Central Indiana. Fishers is our home base, with Westfield just west, Noblesville north and east, Carmel to the north, and Fortville and Pendleton to the southeast and south.
Don't see your city listed? Harmon Heating & Cooling serves additional communities throughout Central Indiana beyond our primary service area — reach out and we'll let you know if we cover your address.
Geothermal is one path to efficient comfort. These are the alternatives we can walk you through, and the same team handles all of them.
Geothermal installation is complex and requires careful system design, but the long-term efficiency and comfort payoff is substantial. Harmon Heating & Cooling will assess your property, explain the investment and savings, and install a system you can rely on for decades.
Call 317-588-8303 to discuss whether geothermal makes sense for your home.
