The 3.5-ton, 14-loop, geo-thermal, direct-exchange, EarthLinked® heating and cooling system is efficient and easy to service, says the manufacturer. Unlike other geothermal systems that rely on plastic tubing to transfer water and anti-freeze through a large intermediate loop, EarthLinked circulates refrigerant through highly conductive copper earth loops, enabling more direct transfer of thermal energy from the earth, says the company.
ECR Technologies, Inc., P.O. Box 3271, Lakeland, FL 33802; 863-701-0096, ext. 23; www.ecrtech.com (website).