How Geothermal Works No matter what climate you live in, the temperature throughout the year varies. For some climatic zones that means hot summers that cool to frigid winters, and Rochester is no exception. What many people don't realize is that the temperature underground (regardless of climate or season) stays fairly consistent all year. The ground is able to sustain a higher rate of constant temperature because it absorbs 47% of the sun's energy (heat) as it hits the Earth's surface. WaterFurnace geothermal systems are able to draw from this free energy with an earth loop. This technology is then put to use to equip 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 draw heat from the ground. As the system pulls heat from the loop it circulates it through a standard duct system as warm air. The same heat energy can also be used for a radiant floor system or household hot water heating. Geothermal Cooling During the cooling mode, cold, conditioned air is distributed throughout the house by doing the exact opposite as the heating process. Heat is not pulled, instead it is driven into the ground. The warm heat is extracted from your home and moved 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 Rochester area, contact Gast Heating & Cooling Inc.. Start saving on your energy bills today.