Air-to-water heat pump 16kW with heating element. Outdoor unit AWHP 16 TR-2 / Indoor unit BLWSI1116MHC. Refrigerant: R410A. With built-in heating circuit control for one pump circuit with high-efficiency pump, status monitoring, system diagnostics and fault detection. Weather-dependent control for one heating circuit and hot water heating. Integrated IWR Alpha with full graphic display and menu-driven text display. Fully integrated hybrid function. Photovoltaic function (PV). Max. flow temperature +60 °C. Built-in starting current limitation via frequency converter. 8 liter expansion tank, pressure gauge and safety valve.