GT-PX Geothermal Split Heat Pump (Best)

• Up to 4.2 COP (closed loop)
• Up to 24.5 EER (closed loop)
• Up to 4.7 COP (open loop)
• Up to 29.4 EER (open loop)
• Two-stage unloading scroll compressor
• Puron refrigerant
• Compatible with many furnaces and air handlers
• 10-year limited warranty on all compressor & major refri...geration components. 5-year limited warranty on other parts

GSW Geothermal Water-to-Water Heat Pump (Better)

• Up to 3.3 COP (closed loop)
• Up to 16.2 EER (closed loop)
• Up to 4.0 COP (open loop)
• Up to 20.6 EER (open loop)
• Single stage scroll compressor
• Heating or chilled water applications
• 10-year limited warranty on all compressor and major refrige...ration components. 5-year limited warranty on other parts