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.
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Mottenhausen4 Dec 2019 15:17This thread will be added to my list whenever the horror of a north-facing orientation is discussed elsewhere, and the mandatory south-facing orientation is promoted instead.
But on the topic: here in the residential area, even now in winter, almost everyone lowers their roller shutters/blinds as soon as the sun shines for more than an hour at a time. So, completely normal.
But on the topic: here in the residential area, even now in winter, almost everyone lowers their roller shutters/blinds as soon as the sun shines for more than an hour at a time. So, completely normal.
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boxandroof4 Dec 2019 15:17Just google: hydraulic balancing, no buffer tank, no ERR. You will surely find guides or threads related to your heating system somewhere. Unfortunately, I’m not familiar with your specific heating system, but you will definitely be able to adjust it better yourself than the technicians.
chewbacca1234 Dec 2019 15:19Tego12 schrieb:
Roller blinds and/or venetian blinds at the bottom are not a good solution for rooms where you spend a lot of time, as we like to have an unobstructed view outside and both options interfere with that. Venetian blinds are probably slightly better than roller blinds in this regard, but having them down is still not ideal from the inside. When you are away, the best solution is of course to close everything up tightly to prevent overheating.
We have now built a patio roof over most of the south-facing side with a retractable awning underneath. When the sun is strong, we simply extend the awning… you won’t be able to look up into the sky anymore, but you have an almost completely clear view straight ahead and the sun does not shine through the windows, while it remains pleasantly bright inside. Since the awning extends 4.5 meters (15 feet) when fully rolled out, we can shade the windows from the outside almost independently of the sun’s position if needed. That of course sounds great, but our house is on a slope. The living area is on the ground floor, the bedrooms are in the basement level. We wanted to install an awning above the bedroom windows to provide shade for the future terrace below. We have already had an electrical connection installed for that.
I’m not sure if you can even install another awning above that. It might look a bit odd as well. I will send another picture attached, showing our house from the terrace side.
chewbacca1234 Dec 2019 15:22boxandroof schrieb:
Just Google: hydraulic balancing, no buffer tank, no ERR. You will surely find guides or forum threads related to your heating system. Unfortunately, I don’t know your heating system, but in any case, you will set it better for yourself than the technicians. Thanks, I’ll look that up right away. I really want to understand how to evaluate our heating system and grasp all the technical details. But the technician simply doesn’t get back to me, which is really frustrating. I just want to understand the device.
Opening windows is also possible with a mechanical ventilation system. We have a passive house, and still, I open the windows on sunny days.
Regarding the south-facing orientation after almost 2 years: South-facing windows are great, no doubt, but the terrace doesn’t necessarily have to face south.
Regarding the south-facing orientation after almost 2 years: South-facing windows are great, no doubt, but the terrace doesn’t necessarily have to face south.
I’m literally rolling on the floor right now, but not because it’s a silly question—rather because the “problem” surprised you.
Jokes aside... this is just how it is with large south-facing windows. We have the same, and it actually helps save money on heating in winter! So it’s not a problem, but a feature.
Summer will be even more fun when you’re sitting inside with the shutters closed and have to turn on the ceiling light because it’s too dark.
Here’s to external venetian blinds!
Jokes aside... this is just how it is with large south-facing windows. We have the same, and it actually helps save money on heating in winter! So it’s not a problem, but a feature.
Summer will be even more fun when you’re sitting inside with the shutters closed and have to turn on the ceiling light because it’s too dark.
Here’s to external venetian blinds!
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