OKHE SMARTSmart water heater with electronic thermostat and the option of connection to HDO. It includes autodidactic algorithm and heats water if required. It is possible to switch to several modes (MANUAL, MANUAL HDO, OPTIMUM, PROG, SMART, ANTI FREEZE). The heater is controlled by means of the operating system Android/iOS.


Flow water heater HA-DR

Flow water heater HA-DRNEW FROM 1. 5. 2018

Characteristic of flow water heaters HA-DR

  • With electrical heating rated at 3,5 kW, 45 kW and 5 kW
  • An unpressurized water tap must be used
  • Mechanical protection to prevent the heating element from overheating
  • For just one supply point
  • Low-pressure flow heaters


Flow water heaters
HA-DR 135 (3,5 kW), HA-DR 145 (4,5 kW), HA-DR 155 (5,5 kW)

Technical data

TypesHA-DR 135 (3,5 kW)HA-DR 145 (4,5 kW)HA-DR 155 (5,5 kW)
Weight [kg] 0,7 0,7 0,7
Power consumption of the el. heating unit [W] 3500 4500 5500
Heating time from 10 °C to 60 °C by means of through-flow

Electrical connection 1 PE-N 230V/50Hz
Recommended circuit breaker size [A] 16 20 25
El. protection IP 24
Energy efficiency class A
Annual consumption [kWh·a–1] 460 472 466



Flow water heater HA-DR, HA-DR T