Central room temperature controller for ERR underfloor heating

Say goodbye to the idea that the heat pump heats individual rooms.

Imagine your entire house with the rooms as a large water circuit.

For each room, you have an adjustable access that determines how much water flows through in what time.

The entire circuit is heated to a certain temperature.

To bring a room to the desired temperature, you must allow a certain amount of water in, depending on the room size.

If all rooms are the same size, that's no problem; you simply let the same amount of water in everywhere.

But rooms are always different sizes, so you have to let in the appropriate amount for each room.

You regulate this via the access (manifold of the underfloor heating, where you can set the flow rate).

Unfortunately, in some rooms, not enough water fits to heat them to the desired temperature (usually the bathrooms because they are small and higher temperatures are desired).

Now you can either create space for more water (reduce pipe spacing or wall heating) or increase the water temperature.

Increasing the temperature (this is the known flow temperature) indeed brings the desired warmth into the bathroom, but the other rooms also become warmer.

So you have to reduce the amount of water there until you reach your desired temperature.

This whole process is called thermal balancing.

Now, there is the problem that at low outside temperatures the heat is no longer sufficient.

You could increase the amount coming into each room, but then you would have the problem of having to adjust everything again precisely so that it fits and you are also limited by the smaller rooms where no more water fits.

But our heating system knows from the outdoor sensor that the outside temperature is dropping.

So it increases the flow temperature to compensate.

Since all rooms were previously adjusted to their correct temperature during thermal balancing, this works.

That is the heating curve of the heating system, which defines how much the flow must be changed when the outside temperature changes.

This is now a simplified representation but depicts the fundamental function.

Thank you for this detailed explanation. I had read that you can be exempted from the installation of the -ERR- for a fee. In this respect, it would make sense to get this exemption and omit ERR completely, right?