Colorado Neighborhood Tests Geothermal Heating for Homes
Ken Caryl Ranch, a newly completed residential development in Littleton, Colorado, is pioneering the use of geothermal heating and cooling systems in nearly 100 homes. This project is a collaboration between Dandelion Energy and Lennar, aiming to accelerate the adoption of residential geothermal technology.
Each home in the development is equipped with a ground-source heat pump, utilizing boreholes between 200 and 500 feet deep to access consistent sub-surface temperatures of around 50°F. A water loop circulates through these boreholes, allowing heat exchange with the earth, and a heat pump in the basement provides the necessary heating or cooling.
The project leverages Dandelion's lightweight drill rig technology, which enables the installation of multiple boreholes per day, significantly reducing deployment time and costs compared to traditional single-site installations. The geothermal systems use approximately 25% of the electricity required by air-source heat pumps during cold periods, thereby reducing peak demand and reliance on fossil fuels.
Ken Caryl Ranch is part of a broader initiative by Dandelion and Lennar to install geothermal systems in over 1,500 homes across Metro Denver by 2027, with ambitions to scale nationally to 10,000 homes annually. This initiative aligns with the Department of Energy's projections that geothermal systems could be installed in 7 million U.S. homes by 2035, potentially reducing winter grid peak demand by over 40 GW and saving about $4 billion annually in grid costs.
The average upfront cost for geothermal systems in new homes is approximately $25,000. Incentives from Xcel Energy, offering rebates up to $25,000 per home, and a $2,000 state tax credit per system in Colorado, further support the financial viability of these installations.