Domestic hot water & heating. Auto-defrost&anti-freezing function. High efficiency with brand compressor. Work in -25oC~43oC. Product Features: 1.Three modes:hot water, heating, hot water + heating. Applying to hot water and heating(floor heating or fan coil heating).2.LCD display wire controller.3.Heating control combined with rooom temperature controller.4.Control solar collecter working(one ...