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 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 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.
Types of Geothermal underground systems
Horizontal Loops
Horizontal Loops are installed in areas where the soil
conditions allow for economical excavation. Taking up more
land area than any other loop type, they are used where space
permits. Trenches are normally 5 feet deep. Normally, several
hundred feet of trench is required.
Vertical Loops
Vertical Loops are used extensively where land area is limited.
A pair of pipes with a special U-Bend assembly at the bottom
are inserted into a bore hole that averages between 150 to
250 feet in depth per ton of equipment.
Open Loops
Open loop systems use water from a surface or underground
source - such as a pond, lake or well.
The water is pumped into the heat pump unit where the heat
is extracted; the water is then discharged back into the
original source.
Lake Loops
Lake Loops are usually very economical to install. If a pond or
lake at least 8 feet deep is available, lake loops can utilize the
water (rather than soil) for heat transfer. Reduced installation
costs are characteristic of this type of loop system.