The rebar cage for each concrete pier contains 120 linear feet of HDPE (high density polyethylene) tubing which forms the ‘ground loop’ for the geothermal heat exchange (ground source heat pump). (Photo courtesy Bryan Mekechuk)

The rebar cage for each concrete pier contains 120 linear feet of HDPE (high density polyethylene) tubing which forms the ‘ground loop’ for the geothermal heat exchange (ground source heat pump). (Photo courtesy Bryan Mekechuk)

The rebar cage for each concrete pier contains 120 linear feet of HDPE (high density polyethylene) tubing which forms the ‘ground loop’ for the geothermal heat exchange (ground source heat pump). (Photo courtesy Bryan Mekechuk)