The Construction Process
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There are two parts to installing a Geothermal Heating System,
which consist of the actual Geothermal Ground Heat Exchanger that
will be installed by Parker Geothermal, and the HVAC portion where
it is married to your ductwork or radiant heat connection done by
your HVAC contractor. There are three types of installations that
Parker Geothermal will install.
Closed Loop Installations
A loop fluid (usually water and antifreeze solution) is circulated
through the loops to the geothermal unit. This solution is sealed
and requires no maintenance. The pipe is a special high-density
material that is used extensively by the natural gas industry. All
underground joints are thermally fused. A properly installed closed
loop has a long life expectancy.
Open Loop Installations
Open installations actually pump water from an underground aquifer
through the geothermal unit and then discharge that water to a drainage
ditch or pond. The geothermal unit processes the heat energy from
the water just like a closed loop installation. Discharging water
to a "return" well is sometimes effective, but sending
water to a pond or lake is considered more reliable.
Standing Column Well System
Standing column wells, also called turbulent wells or Energy Wells,
have become an established technology in the northeastern United
States. Standing wells are typically six inches in diameter and
may be as deep as 1500 ft. Temperate water from the bottom of the
well is withdrawn, circulated through the heat pump's heat exchanger,
and returned to the top of the water column in the same well.