How Geothermal Works As the seasons move from spring to winter, temperature fluctuates throughout the year. Some climates can vary from sweltering summers to freezing winters; Annapolis included. Did you know there is a pretty constant temperature, regardless of climate or season, just below the ground? The Earth's crust absorbs 47% of the sun's heat (energy) and is sustained in the ground a few feet under the surface. WaterFurnace geothermal systems tap into this free heat with an earth loop. This ingenious technology recovers the sun's heat supplying your home or office with central heating and cooling. Geothermal Heating In the heating cycle, a WaterFurnace geothermal heat pump employs the earth loop system to extract the heat from the ground. With delivery through a classic duct system, the geothermal system pulls heat from the loops and circulates it as warm air. Options are available to use that same heat energy to provide hot water heating and radiant floor heat. Geothermal Cooling During the cooling mode, cool, conditioned air is circulated throughout the house by doing the exact opposite as the heating process. Heat is not extracted, instead it is pushed into the ground. The warm heat is pulled from your home and transferred back into the earth loop. Your hot water heating can be fueled by this process as well. For more information on how to get started with a geothermal system in the Annapolis area, contact Continental Services. Start saving on your energy bills today.