Geothermal installation involves drilling ground loops and connecting them to a heat pump system that exchanges thermal energy with the earth at consistent temperatures typically between 45-75 degrees Fahrenheit. These systems operate 25-50 percent more efficiently than air-source units by leveraging stable ground temperatures year-round.
Loop Configuration Types
Closed-loop systems use sealed plastic piping buried 100-400 feet deep vertically or 3-6 feet deep horizontally, circulating antifreeze solution. Open-loop systems pump groundwater directly from wells. Installation depth and loop length depend on heating load calculations, soil thermal conductivity, and available space. A typical 2-ton system requires 1,200-2,500 feet of loop piping.
Installation Complexity
Geothermal installation requires specialized drilling equipment, licensed well contractors in many jurisdictions, and precise loop flushing and pressure testing to IGSHPA standards. System commissioning involves charge verification, flow rate testing (typically 3-5 gallons per minute per ton), and ground thermal conductivity testing. Initial costs range from 15,000 to 30,000 dollars but deliver 30-40 percent lower operating costs compared to conventional HVAC systems.