... Source Heat Pump 1.-25 DC low temp, EVI design 2.Cop to 4.8, 410A 3. ... cooling.Goldsun uses the most advanced low Temp Enhanced Vapour Injection compressor technology and ... heating.Reliable Components1. Hitachi EVI Scroll Compressor.2. Throttle type : Amerson Alco Thermal Expansion Valve3 ... heat pump(evi air to water,low temp, -25 DC, split, CE, EN14511-2:2011, EN14511-2:2007, NFPAC, EURO-VENT, ENERGY ...