A Geostar Aston 4-ton geothermal heat pump and blower assembly replaced an oil-burning furnace, was adapted to existing duct work, and connected to a 350-ft vertical loop installed under this Aurora, NY homeowner’s driveway. Note the now-empty oil tank in the background to the right and the loop pipes entering the basement along the side wall of the stone-and-mortar basement. In addition to air conditioning and heating (at approximately one-third the cost), the system also pre-heats her potable hot water. Incentives reduced the net installed price by 50%.