How does the ventilation (open window) function work on the EB Therm 500?
The ventilation function automatically turns the heat off for 15 minutes if it detects that the temperature drops by more than three degrees in less than one minute. This feature is preset to On but can be turned off in the Installer menu under Functions. When active, the display will show 'Ventilation' as the operating status. (Page 20)
From the official Ebeco EB Therm 500 Floor Heating Thermostat manual, page 20
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