Air-to-water heat pump 8kW without heating element. Outdoor unit AWHP 8 MRB / Indoor unit BLWSI48OH. Without electric heating (OH) = Connection option for one external heat source: can be combined with a second heat source. With built-in, weather-dependent heating circuit control for 1 pump heating circuit, 3 mixing circuits, 2 hot water boilers and a buffer tank 40L (integrated). Integrated IWR Alpha with full graphic color display with menu-driven text. Fully integrated hybrid features. Photovoltaic function (PV). Outdoor temperature sensor included. Power-regulated compressor. Filled with R410A refrigerant. Built-in starting current limitation via frequency converter. No freezing of the outdoor unit. 10 liter expansion tank, pressure gauge, safety valve and quick vent.