All comparisons
Head-to-head
Air-Source vs Geothermal Heat Pumps
Compare air-source and geothermal heat pumps on climate performance, installation cost, efficiency, site requirements, and when each option fits.
Side-by-side comparison
| Factor | Air-source | Geothermal |
|---|---|---|
| Heat source | Outdoor air | Ground or groundwater loop |
| Typical install cost | Lower equipment + install | Higher (drilling / excavation) |
| Cold-weather capacity | Varies by model; check COP @ 5°F | Generally more stable |
| Site needs | Outdoor unit clearance | Land or water-loop access |
| Cooling | Yes (reversible) | Yes (reversible) |
| Best first check | Design temp capacity + ducts | Loop design + geology |
Editorial summary for research—not a substitute for AHRI matched-system data or a site-specific load calculation. Read our methodology.