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.
chewbacca1236 Dec 2019 18:22guckuck2 schrieb:
30.9 degrees at 3 degrees outside temperature is way too high. The return temperature is only 0.2 K below the supply temperature, meaning the heating energy stays in the water. Probably all ERR closed?!
I would complain about the system. Nothing is working properly. What do you mean by all ERR closed?
We are currently heating all rooms via the thermostats.
chewbacca1236 Dec 2019 18:56Climbee schrieb:
chewbacca123, didn’t someone here mention that they spent a few hours thoroughly going through the user manual to optimize their heating system settings?
I think you won’t be able to avoid that either. I was actually offered help, which is why I’m asking these questions.S
Smialbuddler6 Dec 2019 19:33guckuck2 schrieb:
It is also noticeable that 49 degrees Celsius (120°F) is used for hot water, which is quite high and therefore energy-intensive. 45 degrees Celsius (113°F) should be sufficient, and depending on the size of the storage tank and usage patterns, even less might be adequate. How does this align with legionella prevention? I know (from the gas heating context) about the guideline to keep 60 degrees Celsius (140°F) in the storage tank, which is still commonly found online. Are there alternative methods to prevent legionella growth in this case?