IDM iPump 2-8 Optimization / Adjustment

Hello, we moved into our newly built house about half a year ago, which was built as a KfW 50 house with a living area of approximately 145 sqm over 2 floors + attic (no basement). An IDM Aero/iPump 2-8 heat pump is installed, and there is underfloor heating everywhere. Unfortunately, I have no details about the design of the underfloor heating, so I do not know the pipe spacing and also do not know with which target temperature the heating system was calculated.

Our current problem is that not all rooms get (equally) warm. Currently, the setpoint temperature for the heating circuit is 23°, the temperature for eco mode is 16°. The heating curve is currently at 0.44 (I increased it today to test the effect, before it was set to 0.40). Parallel shift is set to 0°. The switch-on time for heating is set to 15 minutes. All thermostats in the rooms to be heated are set between 3 and 6, but we still do not reach the setpoint temperature. In the children's room, the thermostat is currently at 6; according to the thermometer in the room, the temperature during the day was 16.1°. How can that be?

I am slowly running out of ideas about what this could be caused by and why the rooms do not warm up. In my opinion, the consumption is also way too high. Our total electricity consumption since 1.7. is about 3600 kWh. :o

Does anyone have an idea or advice?

Why don't you have the documents for your newly built house? Can you get them yourself? 16 degrees? Was the window open the whole time? Could the heating circuits be mixed up? Otherwise, look into the topic of thermal balancing.

Why don’t you have the documents for your newly built house? Can you get them? 16 degrees? Was the window open the whole time? Could heating circuits be swapped? Otherwise, look into the topic of hydraulic balancing.

It’s not our house, just rented ;) No, with the current outside temperatures the indoor temperature would probably have been much lower. Nothing should be swapped; the valves in the manifold open and close as they should. According to the sight glass, the flow rate is 2 l/min, which is the maximum when the thermostat is set to 6. I also suspect that no hydraulic/thermal balancing was done. But of course, it could also be that something on the heat pump itself would still need to be adjusted. With the heating curve, it should actually be warm everywhere, shouldn’t it? Isn’t 0.44 actually too high for a new building?

If it is rented, you could have the landlord come by. 16 degrees is really quite cold. The distribution box could also be mislabeled. I would almost assume that. With a flow rate of 2l/min, it is not understandable why it is no warmer than 16 degrees. How much flow do the rooms that are warming up show? What else distinguishes the rooms from the children's room?

If it is rented, you could have the landlord come by. 16 degrees is really very cold already. The distribution box could also be mislabeled. I would almost assume that. At 2l/min flow not warmer than 16 degrees is not comprehensible. How much flow do the rooms that get warm show? What else distinguishes the rooms from the children's room?

I also first suspected it was mislabeled, but since the flow rate in the sight glass changes as soon as I set the thermostat to a different value... In the living room, for example, the thermostat is set to 4 and the sight glass also shows 2l/min. Apart from the size, the rooms here do not really differ. Do you think there is any setting directly on the heat pump that I could change first so that it is optimally set from the heat pump side? Then based on that, see how it affects the individual rooms?

I would still not rule out that something is switched around. So it could still be that the pipes lead into another room and warm it up. Just post a photo. As long as only the temperature between the rooms doesn't match, but it basically gets warm, I wouldn't do anything with the heat pump at first, but with the heating circuits.