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.
D
Daniel-Sp5 Jan 2020 20:48I’m not familiar with DV-WP. Does such a system require a combination storage tank?
Daniel-Sp schrieb:
I’m not familiar with DV heat pumps. Does a system like that require a combined storage tank?No idea if a storage tank is mandatory for a DV system.
Lüumel developed a storage solution where the domestic hot water is heated directly by the heating water as it flows through. So, there is no separate hot water storage tank. In our terms, this is called a stratified storage tank, which means it has different temperatures at the top than at the bottom.
Buy an infrared thermometer for around 15 euros, I found errors in the hydraulic balancing of my system. Some heating circuits throttled the heat pump too early because the return temperature rose too quickly.
And one of the three heating circuits in a room was throttled too much, which doesn’t make sense since the others provide more heat.
In the hallway, it was the other way around.
Etc.
Now wait another 24 hours and see if it has made a difference.
And one of the three heating circuits in a room was throttled too much, which doesn’t make sense since the others provide more heat.
In the hallway, it was the other way around.
Etc.
Now wait another 24 hours and see if it has made a difference.
D
Daniel-Sp10 Jan 2020 00:29M4rvin schrieb:
Soon a technician will come for the hydraulic balancing—what should I pay attention to? What definitely needs to be done? Make sure to get a detailed documentation of the underfloor heating system. This should include the installation spacing, the actual installed circuit lengths (not just the pre-calculated ones), pipe diameters (also for the pipes connected to the manifold), the hydraulic diagram, and the installed components. You should receive an explanation of the functionality and operation of the flow meters, and ask if there are any additional flow restrictors in the supply and return lines. Also inquire about any additional bypass valves and how to operate them.
These are details you’ll otherwise have to chase up by phone later. Ask Chewbacca123 for more.
You’ll have to perform the thermal balancing yourself during the next proper winter anyway.
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