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.
chewbacca12320 Dec 2019 14:26guckuck2 schrieb:
Keep in mind that usually all rooms are accessed through the hallway. No matter how well you insulate, it rarely gets truly cold there. The "worst" spot is right by the heat control valve. yes, that's correct
chewbacca12320 Dec 2019 14:27Daniel-Sp schrieb:
The nearly 10K difference in the bedroom is good, and the temperature is already dropping by 1.5K.
It's surprising how high the hallway temperatures are despite a large temperature difference and low flow rate. Maybe the screed still needs another day or two to stabilize. I would wait until tomorrow before making any changes. I remain concerned about the main bathroom; it seems underheated with the underfloor heating system. You might need to add supplemental heating there if necessary.
Have you downloaded "Opendta" yet?
What is your house’s heating load, heating only without hot water? Hey, I’ve downloaded Opendta now.
Where exactly do I need to enter information? I can’t directly paste the Excel table there. I’ve never used this before and can’t find any instructions online.
D
Daniel-Sp20 Dec 2019 16:53When you transfer data to a USB drive, you will receive not only the Excel spreadsheet but also additional files. The ones with a date in the filename and the extension .dta can be opened with the program opendta.
chewbacca12321 Dec 2019 09:00Daniel-Sp schrieb:
When you transfer data to a USB drive, you not only get the Excel spreadsheet but also additional files. The ones with a date in their name and the extension .dta can be opened with the program opendta. So, now I have the graphic. See attached. I did not log data from the 16th to the 18th. D
Daniel-Sp21 Dec 2019 09:16On the statistics page, you can check the duration of a heating cycle—what does it say there?
chewbacca12321 Dec 2019 09:28Daniel-Sp schrieb:
On the statistics page, you can see how long a heating cycle lasts. What does it say there?Attached is the screenshot. I’m also not entirely satisfied with the temperatures this morning.