Horizontal (Trenched or Bored) Loop
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 about
4 to 6 feet [1.2 to 1.8 meters] deep with multiple pipes placed in the
trench at different depths. Normally, several hundred feet [over 100
meters] of trench is required, but where space permits these loops are
considered desirable.
Pond Loops