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The
earth absorbs almost 50% of all solar energy and remains a nearly
constant temperature of 50°F to 70°F depending on geographic location.
Working with an underground loop system, a Bryant climatemaster. geothermal unit
utilizes this constant temperature to exchange energy between your home
and the earth as needed for heating and cooling.
In winter, water circulating inside a sealed loop absorbs heat from the
earth and carries it to the unit. Here it is compressed to a higher
temperature and sent as warm air to your indoor system for distribution
throughout your home.
In the summer, the system reverses and expels heat from your home to the
cooler earth via the loop system. This heat exchange process is not only
natural, but is a truly ingenious and highly efficient way to create a
comfortable climate in your home.
Eveleth, MN 
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ŠNortemp
Heating and Cooling 2005 [Nortemp Inc.]. All right reserved.
Revised: July 25 2008