This logic group provides the optimum flow temperature for underfloor heating based on the measured outdoor temperature. A Nord outdoor temperature sensor is best suited for the measurement.

The following inputs are necessary for the logic group:
- "Min. flow temperature default" - minimum permitted flow and
- "Max. flow temperature default" - Maximum permitted flow.
These must be clarified with the HVAC installer.

- "Tmax" and
- "Tmin"
These inputs are for the maximum outdoor temperatures reached in summer and the minimum temperatures reached in winter in this region. There are tables for each region, which can be found on the internet.

The "Slope" or "Shift" input refers to the heating curve. This can be shifted and thus the slope of the heating curve can be influenced.

The mixer is controlled via a comparator module that moves a blind actuator (short-time object) up or down or open or closed in the event of a SETpoint - ACTUAL deviation. (Do not set the transmission cycle of the ACTUAL VALUE MEASURER too frequently).