The heat collecting capacity of the earth and or the earth's ground waters and surface waters exist as potential energy sources for home heating and cooling. Techniques and devices associated with use of the earth's thermal energy capabilities are presented and evaluated in this four-chapter report. Included in these chapters are: (1) descriptions of available types of earth and water-coupled systems; (2) advantages and drawbacks of earth thermal systems (with evaluative decision-making procedures); (3) descriptions of individual projects on earth and water-coupled systems and heat pumps; and (4) lists of resources, literature, and organizations affiliated with earth and water sources and heat pump technology. Explanatory diagrams are also provided for study and analysis. (ML)