DZ Dražice OKC 300 NTR / HP DHW cylinder for heat pump 286 l heat pump hot water boiler, heat exchanger 3,2 m2, Ø670 h-1585 mm, ready for electric heating Back to: Domestic water heaters for heat pump (large heat exchanger surface + solar heating readiness) Description DZ Dražice NTR / HP hot water boilers for heat pumps (large heat exchanger surface) For more information, see: http://www.dzd.cz