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.
Well, it can’t get very hot since you have a heat pump.
The temperature only rises as high as the flow temperature allows. Because the valves are always open, you distribute the energy evenly and can then set the desired temperatures (flow rate) directly at the heating circuit manifold (HKM).
It takes a while, but afterwards you don’t need to adjust the heat pump anymore and will always have the required temperatures throughout the entire house. The heat pump saves the supplied energy (electricity) because it only provides as much as necessary, and the compressor starts will also decrease.
A positive side effect is that you can fully benefit from the self-regulating effect of a hydronic underfloor heating system and utilize the energy coming from outside (sunlight). This energy will then be distributed to the other rooms and does not stay only on the south side.
The temperature only rises as high as the flow temperature allows. Because the valves are always open, you distribute the energy evenly and can then set the desired temperatures (flow rate) directly at the heating circuit manifold (HKM).
It takes a while, but afterwards you don’t need to adjust the heat pump anymore and will always have the required temperatures throughout the entire house. The heat pump saves the supplied energy (electricity) because it only provides as much as necessary, and the compressor starts will also decrease.
A positive side effect is that you can fully benefit from the self-regulating effect of a hydronic underfloor heating system and utilize the energy coming from outside (sunlight). This energy will then be distributed to the other rooms and does not stay only on the south side.
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boxandroof8 Dec 2019 10:32Once the heat pump is properly set up, it needs to heat every room continuously 24/7, otherwise it will not provide enough warmth. However, thermostats limit the time during which rooms are heated. You adjust the bedrooms during the balancing process.
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Daniel-Sp8 Dec 2019 10:37In a new build, you won’t experience significant temperature differences between the rooms unless you have planned for it in advance and properly insulated the partition walls. You might achieve a 2°C (3.6°F) difference, but hardly 18°C (64°F) in the bedroom and 24°C (75°F) in the bathroom, especially if the rooms are adjacent.
Best regards, Daniel
Best regards, Daniel
chewbacca1238 Dec 2019 10:56Daniel-Sp schrieb:
In a new build, you won’t experience large temperature differences between rooms. Unless you planned for it in advance and insulated the partition walls accordingly. You might achieve a 2K difference, but hardly 18°C (64°F) in the bedroom and 24°C (75°F) in the bathroom, especially if the rooms are adjacent.
Regards, Daniel Hmm, okay!
The bathroom and bedroom are opposite each other, so there is a hallway in between.
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Daniel-Sp10 Dec 2019 00:19Hello,
and what does the heating engineer say?
and what does the heating engineer say?
chewbacca12310 Dec 2019 02:51Daniel-Sp schrieb:
Hi,
what does the heating engineer say? Hey, he made several adjustments. He also mentioned right away that the compressor pulses are way too high and so on. However, as you already said, the ERR units have not been removed.
I’m closely monitoring the situation now and fine-tuning as needed. Hoping that it will be okay for the most part.
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