Hello, we moved into our newly built house about six months ago, which was constructed as a KfW 50 house with a living area of approximately 145 sqm (1,560 sq ft) over two floors plus an attic (no basement). An IDM Aero/iPump 2-8 heat pump is installed, and there is underfloor heating everywhere.
Unfortunately, I don’t have details about the design of the underfloor heating, so I don’t know the pipe spacing or the target temperature used for sizing the heating system.
Our current problem is that not all rooms are warming up equally.
The setpoint temperature for the heating circuit is currently 23°C (73°F), with an eco mode temperature of 16°C (61°F). The heating curve is set at 0.44 (I increased it today to test the impact; it was previously set at 0.40). The parallel shift is set to 0°. The heating activation time 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 target temperature. In the children’s room, the thermostat is currently set to 6, but the thermometer in the room showed a temperature of 16.1°C (61°F) during the day. How can this be?
I’m running out of ideas about what could be causing the rooms not to warm properly.
Also, the energy consumption seems much too high in my opinion. Our total electricity consumption since 1.7. has been around 3600 kWh. :o
Does anyone have any ideas or advice?
Unfortunately, I don’t have details about the design of the underfloor heating, so I don’t know the pipe spacing or the target temperature used for sizing the heating system.
Our current problem is that not all rooms are warming up equally.
The setpoint temperature for the heating circuit is currently 23°C (73°F), with an eco mode temperature of 16°C (61°F). The heating curve is set at 0.44 (I increased it today to test the impact; it was previously set at 0.40). The parallel shift is set to 0°. The heating activation time 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 target temperature. In the children’s room, the thermostat is currently set to 6, but the thermometer in the room showed a temperature of 16.1°C (61°F) during the day. How can this be?
I’m running out of ideas about what could be causing the rooms not to warm properly.
Also, the energy consumption seems much too high in my opinion. Our total electricity consumption since 1.7. has been around 3600 kWh. :o
Does anyone have any ideas or advice?
RotorMotor schrieb:
I wouldn’t rule out the possibility that something is mixed up.
It could still be that the pipes lead to a different room and are warming that one instead.
Please post a photo.
As long as only the temperature difference between the rooms is off, but the heating essentially works, I would first adjust the heating circuits rather than the heat pump. I can do that tomorrow, I can’t access the distribution box right now since it’s in the child’s room and the little one is already asleep.
Yes, basically it does get warm or warmer. But even in the living room it only reaches about 20°C (68°F) when the thermostat is turned all the way up. That’s actually still too "cold".
R
RotorMotor12 Jan 2024 21:20It is important to understand that thermostats usually just switch heating on or off.
So, setting 6 does not necessarily make it warmer than setting 4 if both settings result in an open valve.
So, setting 6 does not necessarily make it warmer than setting 4 if both settings result in an open valve.
RotorMotor schrieb:
It is important to understand that thermostats usually only switch the valve fully on or off.
So, at setting 6, it does not necessarily get warmer than at setting 4 if the valve is open at both settings. I understand that. It's clear that the valve is open at both settings. But shouldn’t the flow rate be different when the thermostat is set to 1 (or 4, doesn’t matter) compared to 6?
R
RotorMotor12 Jan 2024 21:32OBpunkt schrieb:
I understand that. It’s clear that the valve is open in both settings. But shouldn’t the flow rate at thermostat setting 1 (or 4, doesn’t matter) and 6 be different? Clear or unclear, that’s the question here. 😉
If there are no special actuators installed, it’s simply open or closed.
So either there is flow (when the temperature is below the setpoint), or there is no flow (when the temperature is above the setpoint).
For hydraulic balancing, the valves under the thermal actuators need to be adjusted using a radiator key.
This changes the flow rate accordingly.
RotorMotor schrieb:
Clear or not clear, that is the question here. 😉
If no special actuators are installed, it’s simply open or closed.
So either there is flow (temperature below the setpoint), or no flow (temperature above the setpoint).
For the hydraulic balancing, the adjusters under the thermal actuators must be turned with a radiator key.
This changes the flow rate accordingly. Okay, thanks. I’ll take a photo of it tomorrow, maybe that will help us figure it out.
Thanks anyway for the responses. 🙂
Here are the photos from the distribution box on the first floor.
On the left is Child 2’s room, the affected bedroom that is not heating properly. The second open valve is the bathroom; it does get warm there, but in my opinion, it does not reach the 23°C (73°F) target temperature. I haven’t placed a thermometer there yet.
On the left is Child 2’s room, the affected bedroom that is not heating properly. The second open valve is the bathroom; it does get warm there, but in my opinion, it does not reach the 23°C (73°F) target temperature. I haven’t placed a thermometer there yet.
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