Geothermal Heat Pump Systems Compared to Fossil Fuel-Based Systems

Type of Heating in Occupied Housing Units

Sources of Electricity (US & Canada)

Heating Cost Comparison Data

Fuel Cost Comparison of Various Heating Sources

Projected GHP Cost Advantage

Average Annual Ground Temperatures in North America

How a Refrigerator Works

3-Loop Transfer of Energy for GHPs

Geothermal Heating in Winter

Geothermal Cooling in Summer

Open-Loop Installation

Closed-Loop Horizontal Installation

Closed-Loop Slinky Coil Installation

Closed-Loop Vertical Installation

2-Loop Transfer of Energy for DX Systems

DX Borehole Installation

Digital Thermostat Schematic

Relative Cost of Heating Domestic Water

Geothermal 3-Ton System Cost Comparison

Geothermal Super Efficiency

Comparison of Energy Star Standards vs. Real Systems

Mechanical Advantage Analogy: The Lever

Energy Star Criteria (Tier 1 & 2)

European Market of Geothermal Heat Pumps

Growth of GHPs in the US Market