German climatologist and geophysicist who, in 1915, published as expanded version of his 1912 book The Origin of Continents and Oceans. This work was one of the first to suggest continental drift and plate tectonics. He suggested that a supercontinent he called Pangaea had existed in the past, broke up starting 200 million years ago, and that the pieces drifted to their present positions.
Geothermal heating system price varies depending on the type of loop system, usually either vertical or horizontal. On average, a typical home of 2500 square feet, with a heating load of 60,000 BTU and a cooling load of 60,000 BTU will cost between $20,000 to $25,000 to install.
1 CostHelper readers report spending $12,000-$15,000 for complete installation of a geothermal system, at an average cost of $13,400; and a reader in Iowa spent $35,000 to install three geothermal units (one for each floor of a 6,500-square-foot barn which was converted into a bed and breakfast). CostHelper readers report spending $12,000-$15,000 for complete installation of a geothermal system, at an average cost of $13,400; and a reader in Iowa spent $35,000 to install three geothermal units (one for each floor of a 6,500-square-foot barn which was converted into a bed and breakfast).