Hydro-Pro | Swimming Pool Heat Pumps | Compressor type: Rotary; COP at A27/W26: 5.74; Nominal water flow / h: 5,300 L / 1,166 gal; Noise level (1m) : 54 dB(A); Power supply (Voltage): 230 V; Warranty: Two years for heat pump, seven years for compressor and heat exchanger; Water connection: 50 mm / 1½ inch