Bryant Geothermal Heat Pumps GWUp to 25.7 EERUp to 3.8 COP GZUp to 30.5 EERUp to 5.1 COP GPUp to 30 EERUp to 4.6 COP GCUp to 37 EERUp to 5.2 COP GBUp to 28.1 EERUp to 5.2 COP