How Geothermal Works As the seasons change from spring to winter, temperature fluctuates throughout the year. Some climates can range from blazing summers to frigid winters; Alaska included. Did you know there is a fairly consistent temperature, regardless of climate or season, just below the ground? The Earth's crust absorbs 47% of the sun's heat (energy) and is maintained in the ground a few feet under the surface. WaterFurnace geothermal systems extract this free heat source with an earth loop. This innovative technology salvages the sun's heat providing your home or office with central heating and cooling. Geothermal Heating During the heating cycle, a WaterFurnace geothermal heat pump uses the earth loop to extract heat from the ground. As the system pulls heat from the loop it circulates it through a conventional duct system as warm air. The same heat energy can also be put to use for a radiant floor system or domestic hot water heating. Geothermal Cooling During the cooling mode, cold, refreshing air is distributed throughout the house by reversing the heating process. Heat is not pulled, instead it is driven into the ground. The warm heat is pulled from your home and taken back into the earth loop. Your hot water heating can be fueled by this technique as well. For more information on how to get started with a geothermal system in the Alaska area, contact Energy Efficiency Associates. Start saving on your energy bills today.