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 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 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
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.