Do I need to change the heating curve?
No, you normally do not need to change the heating curve. It's good if it's set to a moderate level that suits your house.
If you have previously reduced the heat with radiator thermostats or underfloor heating control, it may be good to open these and then slightly lower the heating curve. When using Ngenic Tune, it's best if you have radiator thermostats and underfloor heating at maximum as a starting point, and thereafter only lower the temperature in the rooms you want a bit cooler. This is more important for heat pumps than for district heating systems.
Tips for those who have used Ngenic Tune for a while:
- Check the history of the "Control Point Adjustment" value during the months of November - March.
- If the Control Point Adjustment is over +4 on average for these months, it may be a good idea to slightly lower the heating curve. (green bars)
- If the Control Point Adjustment is below -4 on average for these months, it may be a good idea to raise the heating curve a little. (red bars)
Control Point Adjustment is a value for how Ngenic Tune adjusts your controller. If there are positive values, it means that the controller should "brake", i.e., send out a lower temperature water to the radiators. Negative values mean that it should heat a little extra. The outdoor temperature that your heating system 'believes' it is outside, is the sum of the measured temperature and 'Control Point Adjustment'. When it's warm outside, the Control Point Adjustment doesn't need to 'brake' anything. Normally, the heating system does not heat when it's warmer than about 20 degrees Celsius outside.
In-depth
Avoid ‘breaking’ the curve in combination with Ngenic Tune. A common linear curve is preferable. Check for suitable minimum and maximum supply temperatures so that it is suitable for your particular house. For example, underfloor heating should not have too high a maximum supply temperature while radiators can handle significantly higher temperatures.
A too high minimum supply temperature can make it difficult to save extra energy when you travel away and use schedules in the Ngenic Tune app.
In addition to raising and lowering the slope of the curve, there is sometimes the possibility of shifting the entire curve upwards or downwards. It may sometimes be appropriate to adjust the curve in this way instead. For example, if it is too hot or too cold regardless of outdoor temperature.