The Pond/Lake System
Pond or Lake Systems (Closed Loop) may be the most economical closed loop system to install and has many advantages for producing energy savings. This system utilizes a nearby body of water such as a lake or a pond. As with the Vertical and Horizontal Systems it is a closed loop of sealed and pressurized plastic pipe and water or an antifreeze fluid solution. Instead of inserting the pipe into a vertical well or laying the pipe in a horizontal trench the pipe is submerged into a body of water (pond or lake) where it can utilize the consistent temperature and outstanding heat transfer characteristics of the water. No wells and very little trenching are required cutting installation costs. Once again the Pond or Lake System is not subject to the cruel outside air temperatures that all air-to-air heat pumps are subject to year after year.