Ground Heat Pump Queen VV16DC Single PC/SOL/VVB. With 250 liter storage tank and connections for external hot water tank.  HxWxD:  Queensland 5-12: 1710x650x705 (RH 1800), Queensland 16: 1910x650x705 (RH 2000)  With overheating removal which is supplied via a thermostatically controlled  circulation pump (variable speed) and is connected to an external  hot water tank  Comes without heat exchanger for solar and solar control (see Accessories for DC  model)