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
C
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.
You do need to read up a bit. But that applies to any type of heating system. Of course, you can just leave it on the factory settings, but then it usually runs suboptimally. You wouldn’t set up a TV based on the manufacturer’s preset settings instead of your own preferences.
By the way, hydraulic balancing is not inherently related to the heat pump. It always needs to be done (or arranged) regardless of the heating method.
By the way, hydraulic balancing is not inherently related to the heat pump. It always needs to be done (or arranged) regardless of the heating method.
chewbacca1231 Oct 2020 09:59Well, about a year ago I was just as shocked to find out that you basically have to do everything yourself. I spent hours, days, and nights working on it and puzzling over it. It was extremely hot inside the house, then far too cold, and the heating system was very inefficient.
But now I would say it’s working really well—after I closed the bypass valve again.
And all of this thanks to the amazing team here in the forum. I’ve received so much help here, it’s incredible. A big thank you once again!
But now I would say it’s working really well—after I closed the bypass valve again.
And all of this thanks to the amazing team here in the forum. I’ve received so much help here, it’s incredible. A big thank you once again!
chewbacca123 schrieb:
...
A technician from the manufacturer Novelan came as well.
He basically checked all my settings and adjusted the bypass valve from almost closed to almost fully open. According to him, this is completely fine, as it would only release excess pressure. The valve needs to be open that far.
Interestingly, I had exactly the same issue. In summer, someone from Stiebel visited several times because my heat pump stopped producing hot water properly. Now that I switched back to heating mode, the unit started short-cycling like crazy.
The technician also opened the bypass valve fully. I even mentioned that I had disabled the ERR and that all circuits were always open... well...
H
hampshire1 Oct 2020 10:38If there is a builder reading who is still choosing their contractors: go with those who are passionate about their profession and the technology they install. This may cost a little more, but it clearly pays off, especially when it comes to heat pumps.
A
Alessandro1 Oct 2020 11:12Mycraft schrieb:
You do have to read a bit. But that applies to any type of heating system. Of course, you can just run it on factory settings, but it usually won’t operate optimally that way. You don’t set up a TV based on the manufacturer’s preset either—you adjust it to your own needs.
By the way, hydraulic balancing has nothing to do specifically with the heat pump. It always needs to be done no matter what type of heating system you have. That’s true to some extent. But a heating system is much more complex than a TV. I’m deliberately choosing an energy-efficient device with a specific seasonal performance factor. I’ve also been adjusting the heating curve so that the temperature in my home is 22.5°C (72.5°F), with all thermostats/valves fully open. Whether these settings are correct, I’m not sure. My heat pump is also short-cycling excessively.
Similar topics