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.


Stationary 1 MPa


Stacionary 1 MPa heater

  • Electric storage water designed for placing on the floor with volumes of 300–1000 litres. The heater is supplied as a separate storage reservoir. The temperature range of heating is 5–74 °C. Different electric heating flange units of the R and SE series from the accessories section may be selected for electric heating. Water heaters of the volume 400 l and 500 l are insulated with hard polyurethane foam with the thickness of 50 mm and provided with white painted steel case. Water heaters of the volume 750 l and 1000 l are insulated with soft polyurethane foam (foam rubber) with the thickness of 80 mm which is supplied separately together with the reservoir.

Main application

  • Heating of hot service water in premises with the possibility to use low tariffs of electric supply (night tariff).


  • Safety valve


OKCE 400 S, OKCE 500 S

Cut of OKCE 400

OKCE 750 S, OKCE 1000 S

Cut of OKCE 750


Stationary 1 MPa
OKCE 300 S, OKCE 400 S, OKCE 500 S, OKCE 750 S, OKCE 1000 S



Technical data

TypeOKCE 300 SOKCE 400 SOKCE 500 SOKCE 750 SOKCE 1000 S
Volume [l] 314 395 455 750 1000
Weight [kg] 80 97 106 175 225
Max. operating overpressure in the tank [MPa] 1
Max. warm water temperature [°C] 90
Heating period from 10 °C to 60 °C Based on selected power input of the built-in unit
Load profile XL XXL XXL XXL XXL
Daily electricity consumption [kWh] 20.09 25.6 25.58    
Mixed water V40 [l] 419.08 521.89 640.08    



OKCE 400 S