Before the homeowner turns up the thermostat, before the HVAC contractor installs the equipment, and before you place the loops and grout the borehole, there is Step 1: the drilling of a good hole that stays open and allows for the loop to be installed to the required depth.
One of Colorado’s largest geothermal projects recently drew to a close. Solaire Apartments in Brighton, Colo., is entirely heated and cooled by ground-source heat pumps.