Clean Energy 101: Geothermal Heat Pumps

Geothermal heat pumps (GHPs) use the constant temperature of the earth to provide efficient heating and cooling with zero direct emissions. While installation costs are higher than fossil fuel alternatives, the Inflation Reduction Act provides tax credits and rebates that can reduce these costs by up to 50%. In the U.S. Midwest, GHPs can reduce emissions by 85-90% compared to gas or propane furnaces and use approximately 80% less energy annually. The document highlights 'networked geothermal' systems for campuses and neighborhoods as a way to achieve over 500% efficiency and lower individual costs through economies of scale.

• Geothermal heat pumps are highly efficient systems that can reduce energy costs by up to 50% and produce no direct emissions, unlike combustion-based systems like gas furnaces.
• Networked geothermal systems, which connect multiple buildings via shared piping, can reach efficiencies exceeding 500%, meaning five units of energy are produced for every one unit input.
• In the U.S. Midwest, geothermal heat pumps are projected to produce approximately 85% fewer emissions than gas furnaces and 90% fewer than propane furnaces through 2050, while using about 80% less annual energy than standard fossil fuel furnaces.
• The Inflation Reduction Act (IRA) significantly lowers the high upfront costs of geothermal installations; a 30% federal tax credit combined with rebates can reduce household project costs by up to 50%, potentially saving up to $15,000.
• Geothermal heat pumps are particularly effective in cold climates, such as Minnesota, where they maintain high output and efficiency during winter months and use four times less electricity on extreme cold days than air-source heat pumps.

APA

RMI (2023). Clean Energy 101: Geothermal Heat Pumps. https://rmi.org/resources/clean-energy-101-geothermal-heat-pumps/

Chicago

RMI. Clean Energy 101: Geothermal Heat Pumps. 2023. https://rmi.org/resources/clean-energy-101-geothermal-heat-pumps/.

Wikipedia

{{cite report |author=RMI |title=Clean Energy 101: Geothermal Heat Pumps |date=29 March 2023 |url=https://rmi.org/resources/clean-energy-101-geothermal-heat-pumps/ |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{rmi2023clean, author = {{RMI}}, title = {{Clean Energy 101: Geothermal Heat Pumps}}, institution = {RMI}, year = {2023}, month = mar, url = {https://rmi.org/resources/clean-energy-101-geothermal-heat-pumps/}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }