UC300 is known as a floor heating controller with an input for external limiting floor temperature sensor. With redesign of the UC300 hardware, a new product, UI300, saw the light of day, a room unit with no control functionality. The UI300 features 1× digital input, 1× triac output, internal temperature and humidity sensor, and analogue input for an external Pt1000 sensor. All values are available in Modbus registers, same as at the other UI… room units.
Another model, UI309, contains an extra CO2 sensor, so it can be deployed e.g. at combined systems with floor heating and air recuperation unit.
More information could be found in the data sheet HERE.