Carrier® Product Categories » Geothermal Heat Pumps Carrier® GT-PE Outdoor Split Geothermal Heat Pump Geothermal Split for Outdoor Installations Carrier® GT-PG Geothermal Heat Pump High-Efficiency Geothermal Unit for Excellent Performance Carrier® GT-PX Split Geothermal Heat Pump Excellent Performance in a Geothermal Split Unit with Exceptional Versatility Carrier® GT-PX Geothermal Heat Pump Ultra-High-Efficient Geothermal Unit for Total Home Comfort Carrier® GT-PW Water-to-Water Geothermal Heat Pump Geothermal Water-to-Water for Radiant and Hydronic Applications Carrier® GT-PW Water-to-Water High-Temp Geothermal Heat Pump High-Temperature Hot-Water Heating for Radiant/Hydronic Applications