... pump, you will see below advantages:1. Compressor and water system split design, can install inside the house in cold ... Compressor protection5. Over/under voltage protectionHouse heating, cooling and hot water option. EVI technology Principle Technical specification:OEM and ODM service ... evi air to water,low temp, -25 DC, split, CE, EN14511-2:2011, EN14511-2:2007, NFPAC, EURO-VENT, ENERGY-STAR, DOE ...