Geothermal is too expensive, but Dig Energy’s impossibly small drill rig might fix that

Dig Energy has emerged from stealth with a compact water-jet drilling rig designed to make geothermal heating and cooling affordable by cutting drilling costs up to 80%. The startup, which just secured $5 million in seed funding, aims to solve geothermal's main obstacle—high installation costs—with their impossibly small rig that can access tight spaces and drill straighter holes, potentially transforming the market for residential and commercial buildings.