What is a lake loop or river loop?
AThe pipe is anchored to the bottom of a water body of sufficient depth, and extracts heat directly from the water. The pipe must be weighted to avoid shifting, and must be protected at the point of entry into the lake to avoid being severed by ice movement in the spring. The position is determined to avoid damage from boat anchors. The amount of heat extracted from the water is so low and diffuse that there is no ecological damage to marine life or aquatic systems, even in the immediate vacinity of the loop.
