Envision Geothermal Systemby WaterFurnace

The Envision Series geothermal system can save homeowners up to 70% on their utility bills, the maker says. The highly efficient system's two-speed compressor units reach a 5.0 COP in heating and a 30 EER in cooling in ground-loop applications. Available in seven single-speed and five dual-capacity sizes, the Envision series uses environmentally friendly R-410A refrigerant, and features microprocessor control that sequences all components during operation for optimum performance. 800.436.7283. www.waterfurnace.com.