Theben KNX OpenTherm Boiler Interface

£179.77 + VAT

  • The KNT-OT-Box S serves as an interface between the boilers with OpenTherm (bus system in heating and ventilation technology) and the KNX system (building system technology)
  • This enables the bidirectional exchange of data between the OpenTherm boiler and the heat distribution via the KNX system (individual room control)
  • In combination with the OT-Box (9070712) from the RAMSES 856 top2 OT (8569132) also heating systems without OpenTherm interface can be controlled
  • Device and KNX bus module can be swapped independently of each other
  • Removable KNX bus module
  • Button for OT-test-program
  • The following functions are available with the KNT- OT-box:
  • Customised flow control
  • Weather-compensation flow control
  • Control of domestic hot water
  • Energy optimization of domestic hot water with solar support
  • Legionella protection program
  • Screed drying program
SKU: 8559201 Category: Tag:


Operating voltage KNX Bus voltage, ≤10 mA
Width 4 modules
Installation type DIN rail
Rated impulse with stand voltage 4 kV
Ambient temperature 0°C … 45°C
Protection class III
Type of protection IP 20



German manufacturer with of high quality KNX components including actuators, binaries and DALI.


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