RCD20 room unit
Digital room unit RCD20

Digital room unit RCD20

The RCD20 digital room unit allows you to easily and comfortably control your heating system from your living room. It is compatible with Seltron heating controllers.


The RCD20 digital room unit is designed to control room temperature in conjunction with a Seltron heating controller. It features a minimalist design and an easy-to-use interface with a large backlit display and a clear keypad.

Key features of the RCD20 Digital Room Unit

  • Display of actual and set temperature.
  • Display of measured temperatures on the controller.
  • Set up with a smart device and Bluetooth connection.
  • User functions PARTY, ECO, HOLIDAYS, FIREPLACE and one-time switch-on of the domestic water heating.
  • Large backlit screen.
  • A modern and elegant look.
Ninja Column 1
Maximum 2 x room units per heating controller WDC, WXD, KXD, KUD, KPD
Maximum 1 x room unit per heating controller CMP, AHC, AHD
Wired connection to the controller
Option to connect an additional temperature sensor
PARTY function - activate comfort mode
ECO function - activate energy-saving mode
HOLIDAY function - activate holiday mode
Fireplace function - activate operation for parallel heating e.g. with a fireplace
SANITARY WATER function - one-time, instant-on heating of sanitary water
Display of actual and set temperature
Display of temperatures measured on the controller
Outdoor temperature display
Display of the temperature of the ester
On the wall
CommunicationModbus, wired connection
Power supply12 V DC, bus line
Own consumption< 0,02 W
Watch accuracy+/- 1 s (24 h) at 20 °C
Degree of protectionIP 20 according to SIST EN 60529
Safety classIII according to SIST EN 60730-1
Type of temperature sensorsRTD Murata NTC (10 kE)
Housing materialPC+ABS thermoplastic
Permissible ambient temperature0÷40 °C
Storage temperature-20÷65 °C
Product weight115 g
Number of pieces per packing unit24 pieces
Dimensions of the RCD20 room unit

We offer

  • Purchase advice and free home viewing.
  • Assistance in obtaining grants from the ECO-FUND.
  • A wide network of verified, professionally trained installers and technicians throughout Slovenia.

Please send us a brief description of what you are interested in and your details. We will contact you and work with you to find the right solution.

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The Seltron service will be closed from 27 December to 29 December 2023.
Any emergencies or issues that arise during our absence will be dealt with as soon as the service reopens on 3 January 2024.
Thank you for your understanding.

Opening hours of the Seltron store on 30 December 2023.
  • from 7.00 to 12.00