Developers are creating a new subdivision of homes in Kennewick, Wash. But instead of providing traditional heating and cooling equipment, they are installing underground geothermal systems, reports The subdivision has 18 lots; the long-term plan is to build 400 homes. It will be Washington’s first all geothermal neighborhood and it will be the largest subdivision of its kind in the country.

The developers say this geothermal system is extremely energy-efficient and residents who move in could save more than $1,000 on their energy bills each year, about 50% to 70% than conventional heating and cooling technologies.