When installing a geothermal heating system, choose the right type of the system based on the space and water source availability, location and ground type. Follow the specific instructions of the manufacturer for installing the system. Dig the trenches deep enough, and use an anti-freeze if the system is a closed-loop one. When using an antifreeze in a closed-loop geothermal system, mix it with water before filling in the pipes.
Talk to a professional to help you choose the right geothermal heating system. Geothermal heating systems are broadly of two types: open-loop and closed-loop. Choose an open-loop system if a clean water source such as a well is available and if local regulations permit it.
Closed-loop systems are of three types: pond, vertical and horizontal. Select a pond system if the water body is located near the home, has a good water quantity and quality, and is adequately deep. A vertical system is appropriate for locations with minimal available space and shallow soil. Horizontal systems are the most cost-effective and are suitable for newly constructed homes with sufficient space.
Horizontal systems require trenches that are a minimum of 4 feet in depth. Vertical systems need 100- to 400-foot-deep trenches with a diameter of 4 inches. Pond systems require 8-foot-deep trenches.
Specific installation instructions with respect to laying pipes and making electrical connections vary from one manufacturer to the other. Talk to the manufacturer regarding the most appropriate installation procedure.