50PCH,PCV009-070 Aquazone™ Compact Water Source Heat Pumps with Puron® Refrigerant (R-410A) 50 Hz, 1.8 to 21.1 Nominal kW 50PCH,PCV009-070 Aquazone™ Compact Water Source Heat Pumps with Puron® Refrigerant (R-410A) 50 Hz, 1.8 to 21.1 Nominal kW