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What is a geothermal heat pump?

A geothermal heat pump is a heating and cooling system that transfers heat between a home and the ground. DOE describes shallow-earth temperatures of 40–70°F. For your project, plan for the ground loop as well as indoor equipment, and ask a geothermal designer to assess whether the property suits the system.

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By InstaBids editorial team with AI research agents. Updated

What this means for your home project

  1. Ask a geothermal designer or local professional engineer to assess whether your property suits a ground-source system. Source: U.S. Department of Energy, read 2026-10-31.
  2. Ask the contractor to determine the home’s heating and cooling requirements before selecting the heat pump size. Source: Province of Manitoba, read 2026-10-31.
  3. Ask the proposal to identify the heat pump, ground loop and indoor air or water distribution system separately. Source: Province of Manitoba, read 2026-10-31.
  4. Discuss landscaping restoration with the contractor before the ground-loop design is settled. Source: Province of Manitoba, read 2026-10-31.
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How do geothermal heat pumps work?

The Department of Energy describes shallow ground at 40–70°F as a heat source in winter and a place to release indoor heat in summer. A geothermal heat pump moves heat between that ground resource and the building. “Geothermal heat pumps (GHPs) or ground-source heat pumps (GSHPs) use the constant temperature of the shallow Earth (40–70°F/4.5–21°C) to provide heating and cooling solutions for buildings wherever the ground can be cost-effectively accessed to depths below seasonal temperature variations.” Source: U.S. Department of Energy, read 2026-10-31. “The thermal energy storage properties of the rocks and soils allow GHPs to act as a heat sink—absorbing excess heat during summer, when surface temperatures are relatively higher—and as a heat source during the winter, when surface temperatures are lower.” Source: U.S. Department of Energy, read 2026-10-31.

How does ENERGY STAR describe a geothermal heat pump?

ENERGY STAR describes equipment that uses the earth’s heat for space heating, cooling and often water heating. For a home project, distinguish the heat pump itself from the ground loop and the system that distributes heat indoors. “Geothermal heat pumps (GHPs) are among the most efficient and comfortable heating and cooling technologies currently available, because they use the earth's natural heat to provide heating, cooling, and often, water heating.” Source: ENERGY STAR, read 2026-10-31. “Each system typically includes three main components: a heat pump unit, loops for exchanging or circulating fluid and the air- or water-delivery system such as ductwork or a hydronic tubing system for in-floor heat.” Source: Province of Manitoba, read 2026-10-31.

How long does a geothermal system last?

The Province of Manitoba gives different lifespans for the buried loop and mechanical equipment: 50-plus years for ground loops and 20 to 24 years for heat pumps with regular maintenance. These are service-life estimates rather than a warranty for a particular installation. “The ground loops can last 50+ years and the mechanical components such as heat pumps can last 20 to 24 years with regular maintenance.” Source: Province of Manitoba, read 2026-10-31.

Do I need a large yard for a geothermal system?

A large yard is not the only possible layout. The Province of Manitoba describes horizontal ground loops and vertical loops using several boreholes in smaller areas. Ask a designer which configuration suits the site rather than assuming yard size alone decides suitability. “These loops can be installed horizontally in an easily excavated high-moisture field or in vertical loop configuration in smaller areas using several boreholes.” Source: Province of Manitoba, read 2026-10-31.

Can geothermal heat pumps provide domestic hot water?

Some can. The Province of Manitoba describes geothermal heat pumps that supply hot water on demand as well as heating and cooling. Ask whether the proposed equipment includes domestic hot water, rather than assuming every geothermal system provides it. “Some geothermal heat pumps can provide all your hot water needs on demand at the same high efficiencies as the heating/cooling cycles.” Source: Province of Manitoba, read 2026-10-31.

Are geothermal systems for new build homes only?

No. The Province of Manitoba explicitly says geothermal installations are not limited to new build homes. For an existing home, the ground-loop layout and indoor heat-delivery system still need a design suited to the building. “No, geothermal installations are not limited to only new build homes.” Source: Province of Manitoba, read 2026-10-31.

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