The room temperature is measured and then compared to the set temperature.  The flame height automatically adjusts to achieve the set temperature.

1. Select Thermostatic Mode from the left sidebar.
2. Touch the color wheel to set the temperature. Blue is the lowest temperature setting and red is the highest.

After touching the color wheel, the new set temperature is shown in the middle of the circle for approx. 3 seconds.  After 3 seconds, the room temperature is shown in the middle of the circle.  An arrow either above or below the room temperature indicates the flame height going up or down to reach set temperature.