Geothermal HVAC Systems

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Geothermal Heating & Cooling Systems in Great Falls, MT | Energy-Saving HVAC

Efficient Comfort from the Ground Up

If you’re looking for a smarter way to heat and cool your home in Montana, geothermal HVAC might be the answer. At Northern Heating & Cooling, we install high-efficiency ground source heat pump systems that use the earth’s stable underground temperatures to deliver year-round indoor comfort. With energy savings up to 50% compared to traditional HVAC systems, geothermal is a sustainable solution built for Great Falls winters and summers alike.

Go Green with Geothermal HVAC

Geothermal systems work by transferring heat between your home and the ground—taking advantage of the constant underground temperature to warm your home in winter and cool it in summer. Unlike air-source heat pumps, these systems don’t rely on outdoor air conditions, making them an excellent fit for Montana’s unpredictable climate. Over time, geothermal HVAC in Montana can slash your energy bills while significantly reducing your carbon footprint.



Whether you live in Fox Farm, Gibson Flats, or the edge of Black Eagle, our team can help design a custom geothermal solution to suit your property and energy goals.

Geothermal Services We Offer

We specialize in full geothermal HVAC system installation for residential properties across Cascade County. Our certified technicians also service and maintain existing geothermal systems, whether we installed them or not.


Each geothermal system includes:

Ground loop installation

Horizontal or vertical piping loops placed underground to exchange heat with the earth

Indoor heat pump unit

Transfers heat between your home and the loop field

Optional desuperheater

For supplemental hot water generation

Every project is custom-engineered to your property, energy needs, and land type.

Is Geothermal Right for You?

Geothermal isn’t a one-size-fits-all solution, but it’s an excellent investment if:


  • You plan to stay in your home long-term
  • You have enough land for loop installation (or suitable drilling access)
  • You want consistent comfort regardless of weather
  • You’re looking to lower your heating and cooling costs over time

Many homeowners in Great Falls qualify for federal tax credits and Montana energy rebates that significantly reduce upfront costs—ask us about current incentives

Our Geothermal Installation Process

Installing a geothermal system is a multi-step project that requires experienced hands. Here’s what to expect:

The whole process is handled by our in-house team—no subcontractors—ensuring accountability from start to finish.

Site Evaluation:

We assess your property to determine the best loop type and layout

Loop Field Installation:

We dig trenches or drill boreholes for the underground loops

Indoor Unit Installation:

We install the geothermal heat pump in place of your furnace or AC

System Testing:

We pressure test the loop, ensure everything runs efficiently, and walk you through system controls

Geothermal FAQs

  • How long do geothermal systems last?

    The underground loop system can last over 50 years, and the indoor heat pump unit typically runs 20–25 years with regular maintenance.

  • Can geothermal be added to an existing home?

    Yes! We frequently retrofit geothermal systems into existing homes, provided there’s adequate land or drill access. We’ll help assess if your home is a candidate.

  • Do geothermal systems provide both heating and cooling?

    Absolutely. One system handles both functions seamlessly, switching between heating and cooling modes as needed.

  • What’s the cost of a geothermal installation in Montana?

    Costs vary based on your property and system size. However, federal tax credits, state rebates, and long-term energy savings often make it more affordable than expected.

  • Can geothermal systems also heat water?

    Yes. A desuperheater can be added to preheat your domestic water, increasing efficiency and lowering water heating costs.

Let’s design a geothermal system for your home or business

Interested in geothermal HVAC in Montana? Contact us for a site assessment and free consultation. We’ll help you determine if geothermal is the right choice and guide you through every step of the process.