Learn · Geothermal
How Geothermal HVAC Works
The ground a few feet down stays ~55°F year-round. Geothermal uses that stable temperature for ultra-efficient comfort.
What geothermal does differently
Geothermal is a heat pump that exchanges heat with the ground instead of the outdoor air, through a buried ground loop. Because the earth a few feet down stays around 55°F all year, the system never fights extreme outdoor temperatures — which makes it one of the most efficient ways to heat and cool a home.
When geothermal is worth considering
It's a strong fit for homeowners staying long-term, building new, or with land for a loop field — anyone prioritizing the lowest long-run operating cost and willing to invest more upfront.
Failure modes to watch for
- Undersized or poorly designed loop — the system can't keep up in extremes.
- Loop or pump leaks — rare but require specialized service.
Proof
Geothermal rewards careful design and installation.
What to do next
Compare lifetime cost in our efficiency & value guide, explore geothermal services, or request an assessment.
About the author
Kenneth Ferrell · Founder
Kenneth Ferrell founded Ferrell's Air Conditioning & Heating in Shelbyville, Kentucky in 1980. With more than four decades in heating and cooling, he built the company into a Carrier Factory Authorized Dealer staffed by NATE-certified technicians and earned Carrier's President's Award. He still believes in honest prices and treating customers like neighbors.