. >> reporr: kathiy's company aims to cost the cost of that process, which involves drifing hundredseet down to install a narrow u shaped pipe. water travels through the ground staysh the pipe where it 50 or 60 degrees. that water is piped up to a heat pump which uses vapor compression to take the heat from the water, the heats it further, and then pushes hot air out to heat the house in winter. >> you can feel theat he >> reporter: when it's hot take hot air from the house and cooling it in the pump. the technology suspect new. it dates back some 70 years. but dandelion's prices are new. before dandelion, she worked at alphabet's r and d arm x, developing a product that converts sea water to. fu that project ended when x couldn't fine a commercial market for it. with geothermal, she sees a market and says the sky is the limit. >> fust people usingl oil in the northeast are spending tens of billions of dollars per year just buying fuel. you have to make it worth people's while. h, reporter: her pi new systems for no money downey nerntded bulk rates with a contractor to do 20 installs in