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Knowledge Base document #3391

Using open window detection with FRITZ!DECT 350

To save energy, you can use the door/window contact FRITZ!DECT 350 for open window detection in combination with your FRITZ! radiator controls. The radiator control keeps the valve closed as long as the door/window contact signals that the window is 'open'. The symbol is shown on the display of the radiator control and then the antifreeze function is enabled:

Note:All instructions on configuration and settings given in this guide refer to the latest FRITZ!OS for the FRITZ!Box.

1 Using a FRITZ! door/window contact for open window detection

  1. Click on 'Smart Home' in the FRITZ!Box user interface.
  2. Click on 'Devices and Groups' in the 'Smart Home' menu.
  3. Click on the (Edit) button for the radiator control you want to regulate using the door/window contact. With FRITZ!OS 8, click on the (Edit) button for the door/window contact.
  4. Select the desired radiator control under 'Open window detection for radiator control'.
  5. Click on 'Apply' to save the settings.

To save energy and minimize DECT radiation, FRITZ! radiator controls only communicate with the FRITZ!Box at certain intervals. Therefore, the FRITZ! door/window contact may not notify the radiator control that the door or window was opened until about three minutes later, so the radiator control does not react until then.



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