ᐅ Underfloor heating with an air-to-water heat pump. House gets too warm when the sun is shining.
Created on: 4 Dec 2019 14:18
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chewbacca123
Hello everyone,
I have a general question.
We moved into our new build four months ago. The living area on the ground floor has three large floor-to-ceiling windows facing south. We have underfloor heating and an air-to-water heat pump.
It provides a really comfortable temperature inside the house, but we have a problem – whenever the sun is shining in winter, even if it’s -2°C (28°F) outside, the temperature suddenly rises to 24°C (75°F) in the living room. It gets uncomfortably warm in here, and the underfloor heating can’t be turned down quickly.
Should we assume that the large floor-to-ceiling windows are responsible for the heat gain? A photo of the south-facing side of the house is attached.
What would you do – always lower all the blinds as soon as sunlight is forecast? That seems quite annoying...
We have motorized blinds controlled by Somfy. Would you consider buying a sensor that automatically lowers the blinds at a certain temperature?
Thanks in advance for your replies.
I have a general question.
We moved into our new build four months ago. The living area on the ground floor has three large floor-to-ceiling windows facing south. We have underfloor heating and an air-to-water heat pump.
It provides a really comfortable temperature inside the house, but we have a problem – whenever the sun is shining in winter, even if it’s -2°C (28°F) outside, the temperature suddenly rises to 24°C (75°F) in the living room. It gets uncomfortably warm in here, and the underfloor heating can’t be turned down quickly.
Should we assume that the large floor-to-ceiling windows are responsible for the heat gain? A photo of the south-facing side of the house is attached.
What would you do – always lower all the blinds as soon as sunlight is forecast? That seems quite annoying...
We have motorized blinds controlled by Somfy. Would you consider buying a sensor that automatically lowers the blinds at a certain temperature?
Thanks in advance for your replies.
chewbacca12322 Jan 2020 10:58pffreestyler schrieb:
Are there similar comparisons for gas? Somehow, I only seem to find comparisons related to heat pumps?Definitely, why not start a thread about itB
boxandroof22 Jan 2020 11:00pffreestyler schrieb:
Are there similar comparisons available for gas? I somehow only ever see comparisons for heat pumps.For such comparisons, you can simply look at the amount of heat energy, which reflects the house’s consumption. This is relatively comparable to gas usage.It has already been mentioned that it makes sense to specify the heat energy as well. Just knowing the electricity consumption doesn’t tell you whether the house uses a lot or little energy, or whether the heat pump is running efficiently or not.
pffreestyler schrieb:
Are there any comparisons like this for gas as well? Somehow, I only ever see comparisons for heat pumps? I’m interested in that too. I monitor my consumption, and it doesn’t seem particularly low to me.
B
boxandroof22 Jan 2020 11:36Altai schrieb:
I’m also interested in this, I track my consumption too and it doesn’t seem to be very low. Search engines are familiar with this heat pump consumption database. In the table, there is a value called "Total kWh heat meter," which is the heat amount recorded by the heat meter for various houses, including information about the living area. This value more or less corresponds to the gas consumption in kWh of a house.
M4rvin schrieb:
Where can you see the amount of heat? I can’t read my heating system; the control unit only shows a rough electricity consumption. It depends on the heat pump, and I’m not familiar with yours. However, it should be noted that the heat meters integrated into the devices themselves are sometimes very inaccurate. They are not suitable for comparisons, troubleshooting, or monitoring improvements, but they might be sufficient for rough estimates. To calculate the annual performance factor, an external heat meter that is or was calibrated is more appropriate.
M4rvin schrieb:
We also have a small house without a basement!
Where can you see the heat output? I can’t read my heating system; the control unit only shows a rough electricity consumption.
The picture shows the consumption before I started adjusting anything!
If you read the values there, I would be very cautious with the consumption data. Most heating manufacturers don’t actually measure the data but calculate the values based on runtime, heat output, etc., and the result often differs significantly from the actual consumption. I would definitely double-check that.
The most practical solution is a separate small energy meter connected to the heat pump. That will then show the actual electricity consumption.
With my AI system using Luxtronik 2.0, there is a dedicated menu point showing heat output for heating and hot water.
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