... pump: 1. working ambient temp. range: -25~45 degree. 2.floor heating,cooling,domestic hot water Monoblock EVI air to water ... auxiliary heater, pressure gage, compressor inside the indoor unit 2.auxiliary heater for option, you can choose from 1.5Kw ... , villas, offices, configuration forms don end equipment (fan coil, floor heating, thermal insulation, etc.), combine with indoor water luxury decoration ...