... to 4.8, 410A 3. House heating & cooling +DWH 4. CE approved Goldsun EVI split air source heat pump --air source ... . Heat exchanger: Plate type heat exchanger6. LCD controller.Multi Protection1. Auto-defrosting function2. High/low pressure protection3. Overload protection4. Compressor protection5 ... pump(evi air to water,low temp, -25 DC, split, CE, EN14511-2:2011, EN14511-2:2007, NFPAC, EURO-VENT, ENERGY ...