... design, the compressor and water part system is split design for cold area to install inside ... Strong low-temperature heating capacity Normal heat pump is difficult to heat below zero 5 °C , ... technology Principle Technical specification:OEM and ODM service is welcomed.If you need more infomation, pls ... air to water,low temp, -25 DC, split, CE, EN14511-2:2011, EN14511-2:2007, NFPAC, EURO-VENT, ENERGY ...