Dražice NTR/HV series boilers, like OKC NTR fast heaters, are designed to be placed on the floor of the utility room, with hot water being prepared using the existing high temperature boiler connected to the built-in heat exchanger.

The main difference between the HV series boilers is in the connection points - while the NTR boiler is connected to the heat exchanger at the side outlets of the unit, the NTR/HV series boiler is connected at the top. This allows the unit to be installed in locations where a piping connection could not otherwise be made, as well as saving space.

These DHW boilers are available in two different versions: the OKC NTR/HV, which is a round boiler similar in design to the conventional NTR series, and the OKH NTR/HV, or cantilevered DHW boiler, whose main advantage is its handier, more compact size.

The OKC NTR/HV boilers are available in 100, 125 and 160 litre capacities.

OKH NTR/HV boilers are available in 100 and 125 litre capacities.

Technical info can be seen below.