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.
I would currently adjust the thermostat very cautiously.
The bedroom is now warmed up, and with the current outside temperatures (we had 15°C (59°F) yesterday), it doesn’t cool down rapidly overnight. You could even turn off the heating completely and there would still be too much heat in the room.
That’s why it doesn’t make much sense to make significant temperature changes right now. When it gets colder again, there is a risk that you have overcompensated and the room becomes too cold.
The bedroom is now warmed up, and with the current outside temperatures (we had 15°C (59°F) yesterday), it doesn’t cool down rapidly overnight. You could even turn off the heating completely and there would still be too much heat in the room.
That’s why it doesn’t make much sense to make significant temperature changes right now. When it gets colder again, there is a risk that you have overcompensated and the room becomes too cold.
chewbacca12318 Dec 2019 09:11bortel schrieb:
then simply close it completely in the walk-in closet and bedroom... and if you notice anything, gradually adjust it to the desired temperatureBut I thought it was important that nothing should be completely closed off?chewbacca12318 Dec 2019 09:12guckuck2 schrieb:
I would currently adjust the controls very cautiously.
The bedroom is already heated, and with the current outdoor temperatures (we had 15°C (59°F) yesterday), it doesn’t cool down rapidly overnight. You could even turn off the heating completely and still have too much warmth in the room.
So it doesn’t really make sense to make major adjustments now. When it gets colder again, there’s a risk that you’ve overdone it and the room becomes too cold.You’re right. Our heating technician will come by again in the next few days; he should at least check the living area and bathroom, because at 20.8°C (69°F) the bathroom feels too cold for me. If necessary, I will simply turn off the bedroom heating completely. Because when you go from that sauna-like bedroom to the bathroom in the morning, you get chills.
D
Daniel-Sp18 Dec 2019 09:14A minimum airflow rate must be ensured. How warm is it where you are now, also around 15°C (59°F)?
chewbacca12318 Dec 2019 09:15Daniel-Sp schrieb:
The minimum air flow must definitely be ensured. How warm is it currently where you are, also 15°C (59°F)?No, we currently have 7°C (45°F) here (Rhineland-Palatinate).D
Daniel-Sp18 Dec 2019 09:28Then I’m waiting for the table...
Regarding the bathroom again. I see this critically: 3 exterior walls, roof, and floor, with hardly any adjacent heated rooms, and probably no underfloor heating beneath the bathtub and shower. So there is little heating surface area for the room with the highest heat demand. A wall heating system should have been installed here to meet the heating requirements. At least you can add heat as needed with the towel radiator. Do you keep the door to the hallway open? I would do that during unused times so that warmth from the hallway can flow into the bathroom.
Regarding the bathroom again. I see this critically: 3 exterior walls, roof, and floor, with hardly any adjacent heated rooms, and probably no underfloor heating beneath the bathtub and shower. So there is little heating surface area for the room with the highest heat demand. A wall heating system should have been installed here to meet the heating requirements. At least you can add heat as needed with the towel radiator. Do you keep the door to the hallway open? I would do that during unused times so that warmth from the hallway can flow into the bathroom.
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