The EarthLinked geothermal heat pump enables the direct transfer of energy with the earth without the need to pump water through an intermediate heat exchange loop. The system's enclosed compressor unit is insulated and quiet, so it can be installed in a basement or utility room, out of sight and immune to weather changes, states the manufacturer. The company says it is minimally invasive to a property, making ground loop installations faster and simpler. According to the manufacturer, the system typically operates in an efficiency range of 350 percent to 400 percent, thereby delivering 3-1/2 to 4 units of heat for every unit of electrical energy required to operate it.

ECR Technologies, 3536 DMG Dr., Lakeland, Florida 33811; 863-701-0096, ext. 24 or 866-211-6102, ext. 24; 863-701-7796 or 866-224-3409 (fax); info@ecrtech.com; www.ecrtech.com.