Ground-source heat pumps, which tap into the stable temperatures found hundreds of feet beneath the Earth’s surface, are a super-efficient way to heat and cool homes. They’re also quite expensive to ...

Homebuilder Lennar is partnering with Dandelion Energy in metro Denver on what the companies say will be one of the country’s largest residential deployments of geothermal heating and cooling.

Over the next two years, homebuilder Lennar is outfitting more than 1,500 new Colorado homes with Dandelion Energy’s geothermal systems in one of the largest residential geothermal rollouts in the US.