Play icon The triangle icon that indicates to play Add impressive durability and less-intrusive trenching methods and the scales begin to tip, at least in the new-home market. And once the system is paid off, the annual return on investment can approach 20 percent. You'll pay several thousand more up front, but in many cases, the payback can come in as little as two or three years. Commensurate savings are common for larger homes. ![]() home can be heated and cooled for about $1 a day. In a technology defined by numbers, here's a fact that everyone will understand: With a geothermal system–they're also called geo-exchange systems–a reasonably tight 2000-sq.-ft. What's so compelling about geothermal technology? Energy efficiency. ![]() Slowly but surely, homeowners are beginning to take notice. When the numbers for the '97-'98 season are tallied, the industry expects similar gains. Though the number of geothermal systems sold today is still less than 1 percent of the domestic heating market, sales for fall 1997 through spring 1998 were up nearly 22 percent from the year before. ![]() And now, thanks to improved equipment and changing attitudes, doors are beginning to open. Proponents of geothermal heating and cooling systems have been pounding on the door of public acceptance for almost two decades.
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